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batctl: page allocation failure

B.A.T.M.A.N. Philipp Psurek 4 participants 10 messages Feb 27, 2016 – Feb 28, 2016 Batman advanced

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Philipp Psurek

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Hi all,

I've got this error with

# batctl -v
batctl 2016.0-4-g7a3d563 [batman-adv: 2016.0-83-g884fb2d]

on

# uname -rmpio
3.4.107-01996-g67bdc52 armv7l ARMv7 Processor rev 4 (v7l) sun7i GNU/Linux

I know the kernel is old, I can take a recent one if needed, but maybe this is not necessary.

The module has been compiled with
CONFIG_BATMAN_ADV_DEBUG=y
CONFIG_BATMAN_ADV_BLA=y
CONFIG_BATMAN_ADV_DAT=y
CONFIG_BATMAN_ADV_NC=y
CONFIG_BATMAN_ADV_MCAST=y
CONFIG_BATMAN_ADV_BATMAN_V=n

and batctl as usual but without stripping. The problem occurs while calling “batctl o”. There should be an output of 336 lines …

Please tell me if you need more information. Thanx in advance and thank you for B.A.T.M.A.N. advanced.

Best regards,
Philipp

----------------------------------

[Feb28 00:10] batman_adv: B.A.T.M.A.N. advanced 2016.0-83-g884fb2d (compatibility version 15) loaded [ +11,632829] batman_adv: bat0: Adding interface: eth0

[  +0,277590] batman_adv: bat0: The MTU of interface eth0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[  +0,058799] batman_adv: bat0: Interface activated: eth0
[  +3,173715] batman_adv: bat0: Adding interface: fastd-wup
[  +0,279096] batman_adv: bat0: The MTU of interface fastd-wup is too small (1426) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[  +0,055496] batman_adv: bat0: Interface activated: fastd-wup
[ +23,247415] bat0: no IPv6 routers present
[Feb28 00:13] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,100723] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,113138] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,110864] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,094211] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,084540] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,082817] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,095673] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,014683] Mem-info:
[  +0,015332] DMA per-cpu:
[  +0,042295] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,043583] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,019240] Normal per-cpu:
[  +0,042920] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,046456] CPU    1: hi:  186, btch:  31 usd:   1
[  +0,030888] HighMem per-cpu:
[  +0,042776] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,046066] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,276204] active_anon:38221 inactive_anon:11325 isolated_anon:0
[  +0,000006]  active_file:95385 inactive_file:84158 isolated_file:0
[  +0,000006]  unevictable:0 dirty:4 writeback:0 unstable:0
[  +0,000004]  free:8954 slab_reclaimable:9981 slab_unreclaimable:2508
[  +0,000005]  mapped:2159 shmem:153 pagetables:326 bounce:0
[  +0,467038] DMA free:10956kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7228kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,043062] lowmem_reserve[]: 0 500 762 762
[  +0,478788] Normal free:22160kB min:2324kB low:2904kB high:3484kB active_anon:64100kB inactive_anon:10132kB active_file:183792kB inactive_file:159760kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:16kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32696kB slab_unreclaimable:8700kB kernel_stack:624kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,041810] lowmem_reserve[]: 0 0 2095 2095
[  +0,485438] HighMem free:2692kB min:260kB low:564kB high:868kB active_anon:47524kB inactive_anon:30992kB active_file:101640kB inactive_file:86064kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:0kB writeback:0kB mapped:3940kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,041504] lowmem_reserve[]: 0 0 0 0
[  +0,019167] DMA: 1167*4kB 178*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 10956kB
[  +0,128889] Normal: 3738*4kB 576*8kB 112*16kB 21*32kB 2*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 22152kB
[  +0,141889] HighMem: 143*4kB 67*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2692kB
[  +0,155726] 179706 total pagecache pages
[  +0,031546] 0 pages in swap cache
[  +0,075081] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,023894] Free swap  = 0kB
[  +0,027333] Total swap = 0kB
[  +0,039682] 262144 pages of RAM
[  +0,020541] 9168 free pages
[  +0,024887] 9338 reserved pages
[  +0,019097] 9130 slab pages
[  +0,025110] 116719 pages shared
[  +0,024278] 0 pages swap cached
[  +4,207166] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,095872] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,104340] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,102166] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,087528] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,080231] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,078142] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,084396] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,011576] Mem-info:
[  +0,014689] DMA per-cpu:
[  +0,041725] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041762] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,017817] Normal per-cpu:
[  +0,041821] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,041736] CPU    1: hi:  186, btch:  31 usd:   0
[  +0,018844] HighMem per-cpu:
[  +0,041736] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041724] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,274703] active_anon:38228 inactive_anon:11330 isolated_anon:0
[  +0,000006]  active_file:95390 inactive_file:84151 isolated_file:0
[  +0,000006]  unevictable:0 dirty:1 writeback:0 unstable:0
[  +0,000004]  free:8958 slab_reclaimable:9981 slab_unreclaimable:2512
[  +0,000005]  mapped:2159 shmem:153 pagetables:326 bounce:0
[  +0,449747] DMA free:10956kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7228kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017854] lowmem_reserve[]: 0 500 762 762
[  +0,474747] Normal free:22180kB min:2324kB low:2904kB high:3484kB active_anon:64124kB inactive_anon:10152kB active_file:183800kB inactive_file:159744kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:0kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32696kB slab_unreclaimable:8708kB kernel_stack:624kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017908] lowmem_reserve[]: 0 0 2095 2095
[  +0,460057] HighMem free:2696kB min:260kB low:564kB high:868kB active_anon:47528kB inactive_anon:30992kB active_file:101652kB inactive_file:86052kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:4kB writeback:0kB mapped:3940kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017830] lowmem_reserve[]: 0 0 0 0
[  +0,015840] DMA: 1167*4kB 178*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 10956kB
[  +0,116928] Normal: 3745*4kB 582*8kB 111*16kB 20*32kB 2*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 22180kB
[  +0,117676] HighMem: 138*4kB 70*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2696kB
[  +0,135363] 179706 total pagecache pages
[  +0,024050] 0 pages in swap cache
[  +0,067731] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,018842] Free swap  = 0kB
[  +0,018837] Total swap = 0kB
[  +0,034725] 262144 pages of RAM
[  +0,017828] 9175 free pages
[  +0,021957] 9338 reserved pages
[  +0,017803] 9130 slab pages
[  +0,021957] 116699 pages shared
[  +0,021958] 0 pages swap cached
[  +2,546832] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,095887] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,104208] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,102153] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,087828] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,080248] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,078215] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,084403] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,011576] Mem-info:
[  +0,014684] DMA per-cpu:
[  +0,041729] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041796] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,017822] Normal per-cpu:
[  +0,041724] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,041730] CPU    1: hi:  186, btch:  31 usd:   0
[  +0,018883] HighMem per-cpu:
[  +0,041723] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041867] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,274716] active_anon:38235 inactive_anon:11327 isolated_anon:0
[  +0,000007]  active_file:95391 inactive_file:84152 isolated_file:0
[  +0,000006]  unevictable:0 dirty:2 writeback:0 unstable:0
[  +0,000004]  free:8953 slab_reclaimable:9981 slab_unreclaimable:2512
[  +0,000005]  mapped:2159 shmem:153 pagetables:326 bounce:0
[  +0,449493] DMA free:10956kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7228kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017933] lowmem_reserve[]: 0 500 762 762
[  +0,474739] Normal free:22160kB min:2324kB low:2904kB high:3484kB active_anon:64128kB inactive_anon:10140kB active_file:183804kB inactive_file:159748kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:4kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32696kB slab_unreclaimable:8708kB kernel_stack:624kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017916] lowmem_reserve[]: 0 0 2095 2095
[  +0,460179] HighMem free:2696kB min:260kB low:564kB high:868kB active_anon:47552kB inactive_anon:30992kB active_file:101652kB inactive_file:86052kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:4kB writeback:0kB mapped:3940kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017960] lowmem_reserve[]: 0 0 0 0
[  +0,015846] DMA: 1167*4kB 178*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 10956kB
[  +0,116798] Normal: 3742*4kB 583*8kB 112*16kB 19*32kB 2*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 22160kB
[  +0,117768] HighMem: 128*4kB 75*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2696kB
[  +0,135597] 179708 total pagecache pages
[  +0,024101] 0 pages in swap cache
[  +0,067730] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,018843] Free swap  = 0kB
[  +0,018838] Total swap = 0kB
[  +0,034639] 262144 pages of RAM
[  +0,017816] 9170 free pages
[  +0,021964] 9338 reserved pages
[  +0,017874] 9130 slab pages
[  +0,021970] 116692 pages shared
[  +0,021963] 0 pages swap cached
[  +2,795628] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,100163] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,112606] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,109882] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,092898] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,081964] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,080373] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,095661] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,018246] Mem-info:
[  +0,016190] DMA per-cpu:
[  +0,042907] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,045696] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,021567] Normal per-cpu:
[  +0,043237] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,042809] CPU    1: hi:  186, btch:  31 usd:   1
[  +0,027782] HighMem per-cpu:
[  +0,044187] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,044017] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,276192] active_anon:38230 inactive_anon:11333 isolated_anon:0
[  +0,000006]  active_file:95396 inactive_file:84156 isolated_file:0
[  +0,000005]  unevictable:0 dirty:2 writeback:0 unstable:0
[  +0,000005]  free:8953 slab_reclaimable:9981 slab_unreclaimable:2512
[  +0,000005]  mapped:2159 shmem:153 pagetables:326 bounce:0
[  +0,467447] DMA free:10956kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7228kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,024492] lowmem_reserve[]: 0 500 762 762
[  +0,475389] Normal free:22176kB min:2324kB low:2904kB high:3484kB active_anon:64128kB inactive_anon:10164kB active_file:183824kB inactive_file:159764kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:4kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32696kB slab_unreclaimable:8708kB kernel_stack:624kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,024240] lowmem_reserve[]: 0 0 2095 2095
[  +0,461051] HighMem free:2680kB min:260kB low:564kB high:868kB active_anon:47532kB inactive_anon:30992kB active_file:101652kB inactive_file:86052kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:4kB writeback:0kB mapped:3940kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,023810] lowmem_reserve[]: 0 0 0 0
[  +0,016839] DMA: 1167*4kB 178*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 10956kB
[  +0,117735] Normal: 3738*4kB 584*8kB 113*16kB 22*32kB 1*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 22200kB
[  +0,118592] HighMem: 124*4kB 75*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2680kB
[  +0,141032] 179710 total pagecache pages
[  +0,024246] 0 pages in swap cache
[  +0,067845] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,019040] Free swap  = 0kB
[  +0,018966] Total swap = 0kB
[  +0,035160] 262144 pages of RAM
[  +0,017932] 9177 free pages
[  +0,022041] 9338 reserved pages
[  +0,022998] 9127 slab pages
[  +0,022106] 116679 pages shared
[  +0,022100] 0 pages swap cached
[Feb28 00:14] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,096010] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,105164] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,102095] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,087646] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,080242] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,078150] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,084499] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,011602] Mem-info:
[  +0,014690] DMA per-cpu:
[  +0,041744] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041755] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,017817] Normal per-cpu:
[  +0,041737] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,041729] CPU    1: hi:  186, btch:  31 usd:   0
[  +0,018845] HighMem per-cpu:
[  +0,041735] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041725] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,274696] active_anon:38218 inactive_anon:11333 isolated_anon:0
[  +0,000005]  active_file:95399 inactive_file:84165 isolated_file:0
[  +0,000006]  unevictable:0 dirty:3 writeback:0 unstable:0
[  +0,000004]  free:8965 slab_reclaimable:9971 slab_unreclaimable:2505
[  +0,000005]  mapped:2158 shmem:153 pagetables:326 bounce:0
[  +0,449546] DMA free:11020kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7164kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,018135] lowmem_reserve[]: 0 500 762 762
[  +0,474663] Normal free:21940kB min:2324kB low:2904kB high:3484kB active_anon:64128kB inactive_anon:10164kB active_file:183836kB inactive_file:159796kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:4kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32672kB slab_unreclaimable:8680kB kernel_stack:632kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017894] lowmem_reserve[]: 0 0 2095 2095
[  +0,460232] HighMem free:2632kB min:260kB low:564kB high:868kB active_anon:47508kB inactive_anon:30992kB active_file:101652kB inactive_file:86056kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:8kB writeback:0kB mapped:3936kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017921] lowmem_reserve[]: 0 0 0 0
[  +0,015956] DMA: 1167*4kB 186*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 11020kB
[  +0,116870] Normal: 3667*4kB 586*8kB 112*16kB 23*32kB 1*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 21948kB
[  +0,117813] HighMem: 110*4kB 76*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2632kB
[  +0,135376] 179719 total pagecache pages
[  +0,024043] 0 pages in swap cache
[  +0,067725] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,018915] Free swap  = 0kB
[  +0,018849] Total swap = 0kB
[  +0,034626] 262144 pages of RAM
[  +0,017849] 9194 free pages
[  +0,022185] 9338 reserved pages
[  +0,017842] 9115 slab pages
[  +0,021995] 116689 pages shared
[  +0,021957] 0 pages swap cached
#1 lore raw

Hi Philipp,

Unfortunately, this is a known issue. The only workaround available right now is increasing RAM. Which I guess is not possible for you with your ARM device.

Matthias Schiffer has been working on a solution:

https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2015-June/013339.html

Not sure whether he would still be inclined to work on that after the lack of feedback he had gotten or whether he still has the time for that.

Regards, Linus

PS: How much (free and in total) RAM does your device have, which device is it exactly? Just that others know how much RAM is needed to read from debugfs with a 300+ nodes setup right now.

Quoted 258 lines · Philipp Psurek

Hi all,

I've got this error with

# batctl -v
batctl 2016.0-4-g7a3d563 [batman-adv: 2016.0-83-g884fb2d]

on

# uname -rmpio
3.4.107-01996-g67bdc52 armv7l ARMv7 Processor rev 4 (v7l) sun7i GNU/Linux

I know the kernel is old, I can take a recent one if needed, but maybe this is not necessary.

The module has been compiled with
CONFIG_BATMAN_ADV_DEBUG=y
CONFIG_BATMAN_ADV_BLA=y
CONFIG_BATMAN_ADV_DAT=y
CONFIG_BATMAN_ADV_NC=y
CONFIG_BATMAN_ADV_MCAST=y
CONFIG_BATMAN_ADV_BATMAN_V=n

and batctl as usual but without stripping. The problem occurs while calling “batctl o”. There should be an output of 336 lines …

Please tell me if you need more information. Thanx in advance and thank you for B.A.T.M.A.N. advanced.

Best regards,
Philipp

----------------------------------

[Feb28 00:10] batman_adv: B.A.T.M.A.N. advanced 2016.0-83-g884fb2d (compatibility version 15) loaded [ +11,632829] batman_adv: bat0: Adding interface: eth0

[  +0,277590] batman_adv: bat0: The MTU of interface eth0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[  +0,058799] batman_adv: bat0: Interface activated: eth0
[  +3,173715] batman_adv: bat0: Adding interface: fastd-wup
[  +0,279096] batman_adv: bat0: The MTU of interface fastd-wup is too small (1426) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[  +0,055496] batman_adv: bat0: Interface activated: fastd-wup
[ +23,247415] bat0: no IPv6 routers present
[Feb28 00:13] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,100723] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,113138] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,110864] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,094211] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,084540] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,082817] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,095673] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,014683] Mem-info:
[  +0,015332] DMA per-cpu:
[  +0,042295] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,043583] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,019240] Normal per-cpu:
[  +0,042920] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,046456] CPU    1: hi:  186, btch:  31 usd:   1
[  +0,030888] HighMem per-cpu:
[  +0,042776] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,046066] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,276204] active_anon:38221 inactive_anon:11325 isolated_anon:0
[  +0,000006]  active_file:95385 inactive_file:84158 isolated_file:0
[  +0,000006]  unevictable:0 dirty:4 writeback:0 unstable:0
[  +0,000004]  free:8954 slab_reclaimable:9981 slab_unreclaimable:2508
[  +0,000005]  mapped:2159 shmem:153 pagetables:326 bounce:0
[  +0,467038] DMA free:10956kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7228kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,043062] lowmem_reserve[]: 0 500 762 762
[  +0,478788] Normal free:22160kB min:2324kB low:2904kB high:3484kB active_anon:64100kB inactive_anon:10132kB active_file:183792kB inactive_file:159760kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:16kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32696kB slab_unreclaimable:8700kB kernel_stack:624kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,041810] lowmem_reserve[]: 0 0 2095 2095
[  +0,485438] HighMem free:2692kB min:260kB low:564kB high:868kB active_anon:47524kB inactive_anon:30992kB active_file:101640kB inactive_file:86064kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:0kB writeback:0kB mapped:3940kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,041504] lowmem_reserve[]: 0 0 0 0
[  +0,019167] DMA: 1167*4kB 178*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 10956kB
[  +0,128889] Normal: 3738*4kB 576*8kB 112*16kB 21*32kB 2*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 22152kB
[  +0,141889] HighMem: 143*4kB 67*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2692kB
[  +0,155726] 179706 total pagecache pages
[  +0,031546] 0 pages in swap cache
[  +0,075081] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,023894] Free swap  = 0kB
[  +0,027333] Total swap = 0kB
[  +0,039682] 262144 pages of RAM
[  +0,020541] 9168 free pages
[  +0,024887] 9338 reserved pages
[  +0,019097] 9130 slab pages
[  +0,025110] 116719 pages shared
[  +0,024278] 0 pages swap cached
[  +4,207166] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,095872] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,104340] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,102166] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,087528] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,080231] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,078142] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,084396] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,011576] Mem-info:
[  +0,014689] DMA per-cpu:
[  +0,041725] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041762] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,017817] Normal per-cpu:
[  +0,041821] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,041736] CPU    1: hi:  186, btch:  31 usd:   0
[  +0,018844] HighMem per-cpu:
[  +0,041736] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041724] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,274703] active_anon:38228 inactive_anon:11330 isolated_anon:0
[  +0,000006]  active_file:95390 inactive_file:84151 isolated_file:0
[  +0,000006]  unevictable:0 dirty:1 writeback:0 unstable:0
[  +0,000004]  free:8958 slab_reclaimable:9981 slab_unreclaimable:2512
[  +0,000005]  mapped:2159 shmem:153 pagetables:326 bounce:0
[  +0,449747] DMA free:10956kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7228kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017854] lowmem_reserve[]: 0 500 762 762
[  +0,474747] Normal free:22180kB min:2324kB low:2904kB high:3484kB active_anon:64124kB inactive_anon:10152kB active_file:183800kB inactive_file:159744kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:0kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32696kB slab_unreclaimable:8708kB kernel_stack:624kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017908] lowmem_reserve[]: 0 0 2095 2095
[  +0,460057] HighMem free:2696kB min:260kB low:564kB high:868kB active_anon:47528kB inactive_anon:30992kB active_file:101652kB inactive_file:86052kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:4kB writeback:0kB mapped:3940kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017830] lowmem_reserve[]: 0 0 0 0
[  +0,015840] DMA: 1167*4kB 178*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 10956kB
[  +0,116928] Normal: 3745*4kB 582*8kB 111*16kB 20*32kB 2*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 22180kB
[  +0,117676] HighMem: 138*4kB 70*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2696kB
[  +0,135363] 179706 total pagecache pages
[  +0,024050] 0 pages in swap cache
[  +0,067731] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,018842] Free swap  = 0kB
[  +0,018837] Total swap = 0kB
[  +0,034725] 262144 pages of RAM
[  +0,017828] 9175 free pages
[  +0,021957] 9338 reserved pages
[  +0,017803] 9130 slab pages
[  +0,021957] 116699 pages shared
[  +0,021958] 0 pages swap cached
[  +2,546832] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,095887] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,104208] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,102153] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,087828] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,080248] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,078215] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,084403] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,011576] Mem-info:
[  +0,014684] DMA per-cpu:
[  +0,041729] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041796] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,017822] Normal per-cpu:
[  +0,041724] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,041730] CPU    1: hi:  186, btch:  31 usd:   0
[  +0,018883] HighMem per-cpu:
[  +0,041723] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041867] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,274716] active_anon:38235 inactive_anon:11327 isolated_anon:0
[  +0,000007]  active_file:95391 inactive_file:84152 isolated_file:0
[  +0,000006]  unevictable:0 dirty:2 writeback:0 unstable:0
[  +0,000004]  free:8953 slab_reclaimable:9981 slab_unreclaimable:2512
[  +0,000005]  mapped:2159 shmem:153 pagetables:326 bounce:0
[  +0,449493] DMA free:10956kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7228kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017933] lowmem_reserve[]: 0 500 762 762
[  +0,474739] Normal free:22160kB min:2324kB low:2904kB high:3484kB active_anon:64128kB inactive_anon:10140kB active_file:183804kB inactive_file:159748kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:4kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32696kB slab_unreclaimable:8708kB kernel_stack:624kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017916] lowmem_reserve[]: 0 0 2095 2095
[  +0,460179] HighMem free:2696kB min:260kB low:564kB high:868kB active_anon:47552kB inactive_anon:30992kB active_file:101652kB inactive_file:86052kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:4kB writeback:0kB mapped:3940kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017960] lowmem_reserve[]: 0 0 0 0
[  +0,015846] DMA: 1167*4kB 178*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 10956kB
[  +0,116798] Normal: 3742*4kB 583*8kB 112*16kB 19*32kB 2*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 22160kB
[  +0,117768] HighMem: 128*4kB 75*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2696kB
[  +0,135597] 179708 total pagecache pages
[  +0,024101] 0 pages in swap cache
[  +0,067730] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,018843] Free swap  = 0kB
[  +0,018838] Total swap = 0kB
[  +0,034639] 262144 pages of RAM
[  +0,017816] 9170 free pages
[  +0,021964] 9338 reserved pages
[  +0,017874] 9130 slab pages
[  +0,021970] 116692 pages shared
[  +0,021963] 0 pages swap cached
[  +2,795628] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,100163] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,112606] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,109882] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,092898] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,081964] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,080373] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,095661] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,018246] Mem-info:
[  +0,016190] DMA per-cpu:
[  +0,042907] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,045696] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,021567] Normal per-cpu:
[  +0,043237] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,042809] CPU    1: hi:  186, btch:  31 usd:   1
[  +0,027782] HighMem per-cpu:
[  +0,044187] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,044017] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,276192] active_anon:38230 inactive_anon:11333 isolated_anon:0
[  +0,000006]  active_file:95396 inactive_file:84156 isolated_file:0
[  +0,000005]  unevictable:0 dirty:2 writeback:0 unstable:0
[  +0,000005]  free:8953 slab_reclaimable:9981 slab_unreclaimable:2512
[  +0,000005]  mapped:2159 shmem:153 pagetables:326 bounce:0
[  +0,467447] DMA free:10956kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7228kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,024492] lowmem_reserve[]: 0 500 762 762
[  +0,475389] Normal free:22176kB min:2324kB low:2904kB high:3484kB active_anon:64128kB inactive_anon:10164kB active_file:183824kB inactive_file:159764kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:4kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32696kB slab_unreclaimable:8708kB kernel_stack:624kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,024240] lowmem_reserve[]: 0 0 2095 2095
[  +0,461051] HighMem free:2680kB min:260kB low:564kB high:868kB active_anon:47532kB inactive_anon:30992kB active_file:101652kB inactive_file:86052kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:4kB writeback:0kB mapped:3940kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,023810] lowmem_reserve[]: 0 0 0 0
[  +0,016839] DMA: 1167*4kB 178*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 10956kB
[  +0,117735] Normal: 3738*4kB 584*8kB 113*16kB 22*32kB 1*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 22200kB
[  +0,118592] HighMem: 124*4kB 75*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2680kB
[  +0,141032] 179710 total pagecache pages
[  +0,024246] 0 pages in swap cache
[  +0,067845] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,019040] Free swap  = 0kB
[  +0,018966] Total swap = 0kB
[  +0,035160] 262144 pages of RAM
[  +0,017932] 9177 free pages
[  +0,022041] 9338 reserved pages
[  +0,022998] 9127 slab pages
[  +0,022106] 116679 pages shared
[  +0,022100] 0 pages swap cached
[Feb28 00:14] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,096010] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,105164] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,102095] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,087646] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,080242] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,078150] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,084499] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,011602] Mem-info:
[  +0,014690] DMA per-cpu:
[  +0,041744] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041755] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,017817] Normal per-cpu:
[  +0,041737] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,041729] CPU    1: hi:  186, btch:  31 usd:   0
[  +0,018845] HighMem per-cpu:
[  +0,041735] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041725] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,274696] active_anon:38218 inactive_anon:11333 isolated_anon:0
[  +0,000005]  active_file:95399 inactive_file:84165 isolated_file:0
[  +0,000006]  unevictable:0 dirty:3 writeback:0 unstable:0
[  +0,000004]  free:8965 slab_reclaimable:9971 slab_unreclaimable:2505
[  +0,000005]  mapped:2158 shmem:153 pagetables:326 bounce:0
[  +0,449546] DMA free:11020kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7164kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,018135] lowmem_reserve[]: 0 500 762 762
[  +0,474663] Normal free:21940kB min:2324kB low:2904kB high:3484kB active_anon:64128kB inactive_anon:10164kB active_file:183836kB inactive_file:159796kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:4kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32672kB slab_unreclaimable:8680kB kernel_stack:632kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017894] lowmem_reserve[]: 0 0 2095 2095
[  +0,460232] HighMem free:2632kB min:260kB low:564kB high:868kB active_anon:47508kB inactive_anon:30992kB active_file:101652kB inactive_file:86056kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:8kB writeback:0kB mapped:3936kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017921] lowmem_reserve[]: 0 0 0 0
[  +0,015956] DMA: 1167*4kB 186*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 11020kB
[  +0,116870] Normal: 3667*4kB 586*8kB 112*16kB 23*32kB 1*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 21948kB
[  +0,117813] HighMem: 110*4kB 76*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2632kB
[  +0,135376] 179719 total pagecache pages
[  +0,024043] 0 pages in swap cache
[  +0,067725] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,018915] Free swap  = 0kB
[  +0,018849] Total swap = 0kB
[  +0,034626] 262144 pages of RAM
[  +0,017849] 9194 free pages
[  +0,022185] 9338 reserved pages
[  +0,017842] 9115 slab pages
[  +0,021995] 116689 pages shared
[  +0,021957] 0 pages swap cached
#2 lore raw
Quoted 5 lines · Linus Lüssing

Hi Philipp,

Unfortunately, this is a known issue. The only workaround available right now is increasing RAM. Which I guess is not possible for you with your ARM device.

This is not correct, this issue has been fixed with kernel 4.4.

If you can't update your kernel to version 4.4, you need to backport the following two commits:

5cec38ac866bfb8775638e71a86e4d8cac30caae
"fs, seq_file: fallback to vmalloc instead of oom kill processes"

0f930902eb8806cff8dcaef9ff9faf3cfa5fd748
"fs, seqfile: always allow oom killer"

(the second commit's log message is a bit misleading, I guess the author meant "avoid" instead of "allow")

Regards,
Matthias

Quoted 275 lines

Matthias Schiffer has been working on a solution:

https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2015-June/013339.html

Not sure whether he would still be inclined to work on that after the lack of feedback he had gotten or whether he still has the time for that.

Regards, Linus

PS: How much (free and in total) RAM does your device have, which device is it exactly? Just that others know how much RAM is needed to read from debugfs with a 300+ nodes setup right now.

Quoted 258 lines · Philipp Psurek

Hi all,

I've got this error with

# batctl -v
batctl 2016.0-4-g7a3d563 [batman-adv: 2016.0-83-g884fb2d]

on

# uname -rmpio
3.4.107-01996-g67bdc52 armv7l ARMv7 Processor rev 4 (v7l) sun7i GNU/Linux

I know the kernel is old, I can take a recent one if needed, but maybe this is not necessary.

The module has been compiled with
CONFIG_BATMAN_ADV_DEBUG=y
CONFIG_BATMAN_ADV_BLA=y
CONFIG_BATMAN_ADV_DAT=y
CONFIG_BATMAN_ADV_NC=y
CONFIG_BATMAN_ADV_MCAST=y
CONFIG_BATMAN_ADV_BATMAN_V=n

and batctl as usual but without stripping. The problem occurs while calling “batctl o”. There should be an output of 336 lines …

Please tell me if you need more information. Thanx in advance and thank you for B.A.T.M.A.N. advanced.

Best regards,
Philipp

----------------------------------

[Feb28 00:10] batman_adv: B.A.T.M.A.N. advanced 2016.0-83-g884fb2d (compatibility version 15) loaded [ +11,632829] batman_adv: bat0: Adding interface: eth0

[  +0,277590] batman_adv: bat0: The MTU of interface eth0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[  +0,058799] batman_adv: bat0: Interface activated: eth0
[  +3,173715] batman_adv: bat0: Adding interface: fastd-wup
[  +0,279096] batman_adv: bat0: The MTU of interface fastd-wup is too small (1426) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
[  +0,055496] batman_adv: bat0: Interface activated: fastd-wup
[ +23,247415] bat0: no IPv6 routers present
[Feb28 00:13] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,100723] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,113138] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,110864] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,094211] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,084540] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,082817] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,095673] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,014683] Mem-info:
[  +0,015332] DMA per-cpu:
[  +0,042295] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,043583] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,019240] Normal per-cpu:
[  +0,042920] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,046456] CPU    1: hi:  186, btch:  31 usd:   1
[  +0,030888] HighMem per-cpu:
[  +0,042776] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,046066] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,276204] active_anon:38221 inactive_anon:11325 isolated_anon:0
[  +0,000006]  active_file:95385 inactive_file:84158 isolated_file:0
[  +0,000006]  unevictable:0 dirty:4 writeback:0 unstable:0
[  +0,000004]  free:8954 slab_reclaimable:9981 slab_unreclaimable:2508
[  +0,000005]  mapped:2159 shmem:153 pagetables:326 bounce:0
[  +0,467038] DMA free:10956kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7228kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,043062] lowmem_reserve[]: 0 500 762 762
[  +0,478788] Normal free:22160kB min:2324kB low:2904kB high:3484kB active_anon:64100kB inactive_anon:10132kB active_file:183792kB inactive_file:159760kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:16kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32696kB slab_unreclaimable:8700kB kernel_stack:624kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,041810] lowmem_reserve[]: 0 0 2095 2095
[  +0,485438] HighMem free:2692kB min:260kB low:564kB high:868kB active_anon:47524kB inactive_anon:30992kB active_file:101640kB inactive_file:86064kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:0kB writeback:0kB mapped:3940kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,041504] lowmem_reserve[]: 0 0 0 0
[  +0,019167] DMA: 1167*4kB 178*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 10956kB
[  +0,128889] Normal: 3738*4kB 576*8kB 112*16kB 21*32kB 2*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 22152kB
[  +0,141889] HighMem: 143*4kB 67*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2692kB
[  +0,155726] 179706 total pagecache pages
[  +0,031546] 0 pages in swap cache
[  +0,075081] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,023894] Free swap  = 0kB
[  +0,027333] Total swap = 0kB
[  +0,039682] 262144 pages of RAM
[  +0,020541] 9168 free pages
[  +0,024887] 9338 reserved pages
[  +0,019097] 9130 slab pages
[  +0,025110] 116719 pages shared
[  +0,024278] 0 pages swap cached
[  +4,207166] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,095872] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,104340] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,102166] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,087528] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,080231] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,078142] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,084396] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,011576] Mem-info:
[  +0,014689] DMA per-cpu:
[  +0,041725] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041762] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,017817] Normal per-cpu:
[  +0,041821] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,041736] CPU    1: hi:  186, btch:  31 usd:   0
[  +0,018844] HighMem per-cpu:
[  +0,041736] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041724] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,274703] active_anon:38228 inactive_anon:11330 isolated_anon:0
[  +0,000006]  active_file:95390 inactive_file:84151 isolated_file:0
[  +0,000006]  unevictable:0 dirty:1 writeback:0 unstable:0
[  +0,000004]  free:8958 slab_reclaimable:9981 slab_unreclaimable:2512
[  +0,000005]  mapped:2159 shmem:153 pagetables:326 bounce:0
[  +0,449747] DMA free:10956kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7228kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017854] lowmem_reserve[]: 0 500 762 762
[  +0,474747] Normal free:22180kB min:2324kB low:2904kB high:3484kB active_anon:64124kB inactive_anon:10152kB active_file:183800kB inactive_file:159744kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:0kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32696kB slab_unreclaimable:8708kB kernel_stack:624kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017908] lowmem_reserve[]: 0 0 2095 2095
[  +0,460057] HighMem free:2696kB min:260kB low:564kB high:868kB active_anon:47528kB inactive_anon:30992kB active_file:101652kB inactive_file:86052kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:4kB writeback:0kB mapped:3940kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017830] lowmem_reserve[]: 0 0 0 0
[  +0,015840] DMA: 1167*4kB 178*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 10956kB
[  +0,116928] Normal: 3745*4kB 582*8kB 111*16kB 20*32kB 2*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 22180kB
[  +0,117676] HighMem: 138*4kB 70*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2696kB
[  +0,135363] 179706 total pagecache pages
[  +0,024050] 0 pages in swap cache
[  +0,067731] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,018842] Free swap  = 0kB
[  +0,018837] Total swap = 0kB
[  +0,034725] 262144 pages of RAM
[  +0,017828] 9175 free pages
[  +0,021957] 9338 reserved pages
[  +0,017803] 9130 slab pages
[  +0,021957] 116699 pages shared
[  +0,021958] 0 pages swap cached
[  +2,546832] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,095887] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,104208] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,102153] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,087828] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,080248] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,078215] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,084403] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,011576] Mem-info:
[  +0,014684] DMA per-cpu:
[  +0,041729] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041796] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,017822] Normal per-cpu:
[  +0,041724] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,041730] CPU    1: hi:  186, btch:  31 usd:   0
[  +0,018883] HighMem per-cpu:
[  +0,041723] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041867] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,274716] active_anon:38235 inactive_anon:11327 isolated_anon:0
[  +0,000007]  active_file:95391 inactive_file:84152 isolated_file:0
[  +0,000006]  unevictable:0 dirty:2 writeback:0 unstable:0
[  +0,000004]  free:8953 slab_reclaimable:9981 slab_unreclaimable:2512
[  +0,000005]  mapped:2159 shmem:153 pagetables:326 bounce:0
[  +0,449493] DMA free:10956kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7228kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017933] lowmem_reserve[]: 0 500 762 762
[  +0,474739] Normal free:22160kB min:2324kB low:2904kB high:3484kB active_anon:64128kB inactive_anon:10140kB active_file:183804kB inactive_file:159748kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:4kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32696kB slab_unreclaimable:8708kB kernel_stack:624kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017916] lowmem_reserve[]: 0 0 2095 2095
[  +0,460179] HighMem free:2696kB min:260kB low:564kB high:868kB active_anon:47552kB inactive_anon:30992kB active_file:101652kB inactive_file:86052kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:4kB writeback:0kB mapped:3940kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017960] lowmem_reserve[]: 0 0 0 0
[  +0,015846] DMA: 1167*4kB 178*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 10956kB
[  +0,116798] Normal: 3742*4kB 583*8kB 112*16kB 19*32kB 2*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 22160kB
[  +0,117768] HighMem: 128*4kB 75*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2696kB
[  +0,135597] 179708 total pagecache pages
[  +0,024101] 0 pages in swap cache
[  +0,067730] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,018843] Free swap  = 0kB
[  +0,018838] Total swap = 0kB
[  +0,034639] 262144 pages of RAM
[  +0,017816] 9170 free pages
[  +0,021964] 9338 reserved pages
[  +0,017874] 9130 slab pages
[  +0,021970] 116692 pages shared
[  +0,021963] 0 pages swap cached
[  +2,795628] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,100163] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,112606] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,109882] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,092898] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,081964] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,080373] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,095661] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,018246] Mem-info:
[  +0,016190] DMA per-cpu:
[  +0,042907] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,045696] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,021567] Normal per-cpu:
[  +0,043237] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,042809] CPU    1: hi:  186, btch:  31 usd:   1
[  +0,027782] HighMem per-cpu:
[  +0,044187] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,044017] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,276192] active_anon:38230 inactive_anon:11333 isolated_anon:0
[  +0,000006]  active_file:95396 inactive_file:84156 isolated_file:0
[  +0,000005]  unevictable:0 dirty:2 writeback:0 unstable:0
[  +0,000005]  free:8953 slab_reclaimable:9981 slab_unreclaimable:2512
[  +0,000005]  mapped:2159 shmem:153 pagetables:326 bounce:0
[  +0,467447] DMA free:10956kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7228kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,024492] lowmem_reserve[]: 0 500 762 762
[  +0,475389] Normal free:22176kB min:2324kB low:2904kB high:3484kB active_anon:64128kB inactive_anon:10164kB active_file:183824kB inactive_file:159764kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:4kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32696kB slab_unreclaimable:8708kB kernel_stack:624kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,024240] lowmem_reserve[]: 0 0 2095 2095
[  +0,461051] HighMem free:2680kB min:260kB low:564kB high:868kB active_anon:47532kB inactive_anon:30992kB active_file:101652kB inactive_file:86052kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:4kB writeback:0kB mapped:3940kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,023810] lowmem_reserve[]: 0 0 0 0
[  +0,016839] DMA: 1167*4kB 178*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 10956kB
[  +0,117735] Normal: 3738*4kB 584*8kB 113*16kB 22*32kB 1*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 22200kB
[  +0,118592] HighMem: 124*4kB 75*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2680kB
[  +0,141032] 179710 total pagecache pages
[  +0,024246] 0 pages in swap cache
[  +0,067845] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,019040] Free swap  = 0kB
[  +0,018966] Total swap = 0kB
[  +0,035160] 262144 pages of RAM
[  +0,017932] 9177 free pages
[  +0,022041] 9338 reserved pages
[  +0,022998] 9127 slab pages
[  +0,022106] 116679 pages shared
[  +0,022100] 0 pages swap cached
[Feb28 00:14] batctl: page allocation failure: order:4, mode:0x40d0
[  +0,096010] [<c00153a4>] (unwind_backtrace+0x0/0x134) from [<c00af79c>] (warn_alloc_failed+0xe0/0x118)
[  +0,105164] [<c00af79c>] (warn_alloc_failed+0xe0/0x118) from [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc)
[  +0,102095] [<c00b1ff0>] (__alloc_pages_nodemask+0x574/0x7cc) from [<c00b22ac>] (__get_free_pages+0x10/0x24)
[  +0,087646] [<c00b22ac>] (__get_free_pages+0x10/0x24) from [<c0108bd8>] (seq_read+0x238/0x490)
[  +0,080242] [<c0108bd8>] (seq_read+0x238/0x490) from [<c00eb3f4>] (vfs_read+0x98/0x174)
[  +0,078150] [<c00eb3f4>] (vfs_read+0x98/0x174) from [<c00eb8a0>] (sys_read+0x38/0x78)
[  +0,084499] [<c00eb8a0>] (sys_read+0x38/0x78) from [<c000ecc0>] (ret_fast_syscall+0x0/0x30)
[  +0,011602] Mem-info:
[  +0,014690] DMA per-cpu:
[  +0,041744] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041755] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,017817] Normal per-cpu:
[  +0,041737] CPU    0: hi:  186, btch:  31 usd:   0
[  +0,041729] CPU    1: hi:  186, btch:  31 usd:   0
[  +0,018845] HighMem per-cpu:
[  +0,041735] CPU    0: hi:   90, btch:  15 usd:   0
[  +0,041725] CPU    1: hi:   90, btch:  15 usd:   0
[  +0,274696] active_anon:38218 inactive_anon:11333 isolated_anon:0
[  +0,000005]  active_file:95399 inactive_file:84165 isolated_file:0
[  +0,000006]  unevictable:0 dirty:3 writeback:0 unstable:0
[  +0,000004]  free:8965 slab_reclaimable:9971 slab_unreclaimable:2505
[  +0,000005]  mapped:2158 shmem:153 pagetables:326 bounce:0
[  +0,449546] DMA free:11020kB min:1180kB low:1472kB high:1768kB active_anon:41260kB inactive_anon:4176kB active_file:96108kB inactive_file:90808kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:260096kB mlocked:0kB dirty:0kB writeback:0kB mapped:3224kB shmem:488kB slab_reclaimable:7164kB slab_unreclaimable:1340kB kernel_stack:176kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,018135] lowmem_reserve[]: 0 500 762 762
[  +0,474663] Normal free:21940kB min:2324kB low:2904kB high:3484kB active_anon:64128kB inactive_anon:10164kB active_file:183836kB inactive_file:159796kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:512064kB mlocked:0kB dirty:4kB writeback:0kB mapped:1472kB shmem:4kB slab_reclaimable:32672kB slab_unreclaimable:8680kB kernel_stack:632kB pagetables:1304kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017894] lowmem_reserve[]: 0 0 2095 2095
[  +0,460232] HighMem free:2632kB min:260kB low:564kB high:868kB active_anon:47508kB inactive_anon:30992kB active_file:101652kB inactive_file:86056kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:268224kB mlocked:0kB dirty:8kB writeback:0kB mapped:3936kB shmem:120kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
[  +0,017921] lowmem_reserve[]: 0 0 0 0
[  +0,015956] DMA: 1167*4kB 186*8kB 80*16kB 32*32kB 18*64kB 5*128kB 3*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 11020kB
[  +0,116870] Normal: 3667*4kB 586*8kB 112*16kB 23*32kB 1*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 21948kB
[  +0,117813] HighMem: 110*4kB 76*8kB 37*16kB 13*32kB 7*64kB 1*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2632kB
[  +0,135376] 179719 total pagecache pages
[  +0,024043] 0 pages in swap cache
[  +0,067725] Swap cache stats: add 933557, delete 933557, find 273255/316856
[  +0,018915] Free swap  = 0kB
[  +0,018849] Total swap = 0kB
[  +0,034626] 262144 pages of RAM
[  +0,017849] 9194 free pages
[  +0,022185] 9338 reserved pages
[  +0,017842] 9115 slab pages
[  +0,021995] 116689 pages shared
[  +0,021957] 0 pages swap cached
author
#3 lore raw
In reply to Linus Lüssing

Hi Linus,

thank you for your answer. (Un)fortunately I can not reproduce the page allocation failure any more after adding one more Batman device to the Ethernet or moving some files through NFS.

Am Sonntag, den 28.02.2016, 14:27 +0100 schrieb Linus Lüssing:
[…]

Quoted 2 lines

PS: How much (free and in total) RAM does your device have, which device is

The ARM device is a Cubieboard with Allwinner A20 CPU and 1 GiB RAM. The RAM usage was not different to this output [1], but I can not assure this. Anyway the system has plenty of RAM and was idle

Quoted 2 lines

it exactly? Just that others know how much RAM is needed to read from debugfs with a 300+ nodes setup right now.

There is no problem watching the originators on an 32 MiB RAM OpenWrt router with 3.10.49 mips.

I'm sorry bothering you with this issue. Have a lot of fun developing B.A.T.M.A.N. advanced.

Best regards,
Philipp

[1] # cat /proc/meminfo

MemTotal:        1011224 kB
MemFree:           18044 kB
Buffers:           61100 kB
Cached:           825416 kB
SwapCached:            0 kB
Active:           383532 kB
Inactive:         548588 kB
Active(anon):      24220 kB
Inactive(anon):    21984 kB
Active(file):     359312 kB
Inactive(file):   526604 kB
Unevictable:           0 kB
Mlocked:               0 kB
HighTotal:        270336 kB
HighFree:            988 kB
LowTotal:         740888 kB
LowFree:           17056 kB
SwapTotal:       4194300 kB
SwapFree:        4194300 kB
Dirty:              1580 kB
Writeback:             0 kB
AnonPages:         45656 kB
Mapped:             3844 kB
Shmem:               616 kB
Slab:              47596 kB
SReclaimable:      37300 kB
SUnreclaim:        10296 kB
KernelStack:         792 kB
PageTables:         1004 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     4699912 kB
Committed_AS:     117352 kB
VmallocTotal:     245760 kB
VmallocUsed:       14052 kB
VmallocChunk:     212928 kB
maintainer
#4 lore raw
In reply to Philipp Psurek
Quoted 3 lines · On Sunday 28 February 2016 00:39:08 Philipp Psurek wrote:

Hi all,

I've got this error with

[..]

Quoted 3 lines

----------------------------------

[..]

Quoted 1 line

[Feb28 00:13] batctl: page allocation failure: order:4, mode:0x40d0

Does this always happen when you use batctl o on a system with many entries in the originator table? When yes, then you could try the attached (very rough) proof-of-concept patch. It is based on v2016.0-92-gd7c9a9e

Kind regards,
Sven

From: Sven Eckelmann <[email protected]>
Date: Sun, 28 Feb 2016 17:13:12 +0100
Subject: [RFC] TEST: speedup originator output by using seq_operations

---
 net/batman-adv/bat_iv_ogm.c            | 93 ++++++++++++++--------------------
 net/batman-adv/bat_v.c                 | 91 +++++++++++++--------------------
 net/batman-adv/bridge_loop_avoidance.c |  4 +-
 net/batman-adv/debugfs.c               | 50 ++++++++++++++++--
 net/batman-adv/distributed-arp-table.c |  2 +-
 net/batman-adv/gateway_client.c        |  2 +-
 net/batman-adv/main.c                  |  5 +-
 net/batman-adv/main.h                  |  3 +-
 net/batman-adv/network-coding.c        |  2 +-
 net/batman-adv/originator.c            | 87 ++++++++++++++++++++++++++-----
 net/batman-adv/originator.h            |  7 ++-
 net/batman-adv/translation-table.c     |  4 +-
 net/batman-adv/types.h                 | 30 ++++++++++-
 13 files changed, 241 insertions(+), 139 deletions(-)
net/batman-adv/bat_iv_ogm.c +37 -56
index 2c65668..cddb3e8 100644
@@ -1846,74 +1846,54 @@ batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node,
 	}
 }
 
-/**
- * batadv_iv_ogm_orig_print - print the originator table
- * @bat_priv: the bat priv with all the soft interface information
- * @seq: debugfs table seq_file struct
- * @if_outgoing: the outgoing interface for which this should be printed
- */
-static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv,
-				     struct seq_file *seq,
-				     struct batadv_hard_iface *if_outgoing)
+static void batadv_iv_ogm_oriq_seq_header(struct batadv_priv *bat_priv,
+					  struct seq_file *seq)
 {
-	struct batadv_neigh_node *neigh_node;
-	struct batadv_hashtable *hash = bat_priv->orig_hash;
-	int last_seen_msecs, last_seen_secs;
-	struct batadv_orig_node *orig_node;
-	struct batadv_neigh_ifinfo *n_ifinfo;
-	unsigned long last_seen_jiffies;
-	struct hlist_head *head;
-	int batman_count = 0;
-	u32 i;
-
 	seq_printf(seq, "  %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
 		   "Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE,
 		   "Nexthop", "outgoingIF", "Potential nexthops");
+}
 
-	for (i = 0; i < hash->size; i++) {
-		head = &hash->table[i];
+static void batadv_iv_ogm_orig_seq_show(struct batadv_priv *bat_priv,
+					struct seq_file *seq,
+					struct batadv_orig_node *orig_node,
+					struct batadv_hard_iface *if_outgoing)
+{
+	struct batadv_neigh_node *neigh_node;
+	int last_seen_msecs, last_seen_secs;
+	struct batadv_neigh_ifinfo *n_ifinfo;
+	unsigned long last_seen_jiffies;
 
-		rcu_read_lock();
-		hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
-			neigh_node = batadv_orig_router_get(orig_node,
-							    if_outgoing);
-			if (!neigh_node)
-				continue;
+	neigh_node = batadv_orig_router_get(orig_node, if_outgoing);
+	if (!neigh_node)
+		return;
 
-			n_ifinfo = batadv_neigh_ifinfo_get(neigh_node,
-							   if_outgoing);
-			if (!n_ifinfo)
-				goto next;
+	n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
+	if (!n_ifinfo)
+		goto next;
 
-			if (n_ifinfo->bat_iv.tq_avg == 0)
-				goto next;
+	if (n_ifinfo->bat_iv.tq_avg == 0)
+		goto next;
 
-			last_seen_jiffies = jiffies - orig_node->last_seen;
-			last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
-			last_seen_secs = last_seen_msecs / 1000;
-			last_seen_msecs = last_seen_msecs % 1000;
+	last_seen_jiffies = jiffies - orig_node->last_seen;
+	last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
+	last_seen_secs = last_seen_msecs / 1000;
+	last_seen_msecs = last_seen_msecs % 1000;
 
-			seq_printf(seq, "%pM %4i.%03is   (%3i) %pM [%10s]:",
-				   orig_node->orig, last_seen_secs,
-				   last_seen_msecs, n_ifinfo->bat_iv.tq_avg,
-				   neigh_node->addr,
-				   neigh_node->if_incoming->net_dev->name);
+	seq_printf(seq, "%pM %4i.%03is   (%3i) %pM [%10s]:",
+			orig_node->orig, last_seen_secs,
+			last_seen_msecs, n_ifinfo->bat_iv.tq_avg,
+			neigh_node->addr,
+			neigh_node->if_incoming->net_dev->name);
 
-			batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing,
-						       seq);
-			seq_puts(seq, "\n");
-			batman_count++;
+	batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing,
+					seq);
+	seq_puts(seq, "\n");
 
 next:
-			batadv_neigh_node_put(neigh_node);
-			if (n_ifinfo)
-				batadv_neigh_ifinfo_put(n_ifinfo);
-		}
-		rcu_read_unlock();
-	}
-
-	if (batman_count == 0)
-		seq_puts(seq, "No batman nodes in range ...\n");
+	batadv_neigh_node_put(neigh_node);
+	if (n_ifinfo)
+		batadv_neigh_ifinfo_put(n_ifinfo);
 }
 
 /**

@@ -2062,7 +2042,8 @@ static struct batadv_algo_ops batadv_batman_iv __read_mostly = {
 	.bat_neigh_cmp = batadv_iv_ogm_neigh_cmp,
 	.bat_neigh_is_similar_or_better = batadv_iv_ogm_neigh_is_sob,
 	.bat_neigh_print = batadv_iv_neigh_print,
-	.bat_orig_print = batadv_iv_ogm_orig_print,
+	.bat_orig_seq_header = batadv_iv_ogm_oriq_seq_header,
+	.bat_orig_seq_show = batadv_iv_ogm_orig_seq_show,
 	.bat_orig_free = batadv_iv_ogm_orig_free,
 	.bat_orig_add_if = batadv_iv_ogm_orig_add_if,
 	.bat_orig_del_if = batadv_iv_ogm_orig_del_if,
net/batman-adv/bat_v.c +36 -55

115 lines not on this page · raw message

net/batman-adv/bridge_loop_avoidance.c +2 -2
index 642167f..c00b9b8 100644
@@ -1807,7 +1807,7 @@ int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset)
 	bool is_own;
 	u8 *primary_addr;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
 

@@ -1865,7 +1865,7 @@ int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, void *offset)
 	bool is_own;
 	u8 *primary_addr;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/debugfs.c +47 -3

71 lines not on this page · raw message

net/batman-adv/distributed-arp-table.c +1 -1
index 919a8d2..dc553e5 100644
@@ -809,7 +809,7 @@ int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset)
 	int last_seen_msecs, last_seen_secs, last_seen_mins;
 	u32 i;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/gateway_client.c +1 -1
index c59aff5..1c2360c 100644
@@ -637,7 +637,7 @@ int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset)
 	struct batadv_gw_node *gw_node;
 	int gw_count = 0;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/main.c +3 -2
index d64ddb9..74c81eb 100644
@@ -269,13 +269,14 @@ bool batadv_is_my_mac(struct batadv_priv *bat_priv, const u8 *addr)
  * batadv_seq_print_text_primary_if_get - called from debugfs table printing
  *  function that requires the primary interface
  * @seq: debugfs table seq_file struct
+ * @net_dev: batman-adv net_device
  *
  * Return: primary interface if found or NULL otherwise.
  */
 struct batadv_hard_iface *
-batadv_seq_print_text_primary_if_get(struct seq_file *seq)
+batadv_seq_print_text_primary_if_get(struct seq_file *seq,
+				     struct net_device *net_dev)
 {
-	struct net_device *net_dev = (struct net_device *)seq->private;
 	struct batadv_priv *bat_priv = netdev_priv(net_dev);
 	struct batadv_hard_iface *primary_if;
net/batman-adv/main.h +2 -1
index e602408..94e9f57 100644
@@ -203,7 +203,8 @@ int batadv_mesh_init(struct net_device *soft_iface);
 void batadv_mesh_free(struct net_device *soft_iface);
 bool batadv_is_my_mac(struct batadv_priv *bat_priv, const u8 *addr);
 struct batadv_hard_iface *
-batadv_seq_print_text_primary_if_get(struct seq_file *seq);
+batadv_seq_print_text_primary_if_get(struct seq_file *seq,
+				     struct net_device *net_dev);
 int batadv_max_header_len(void);
 void batadv_skb_set_priority(struct sk_buff *skb, int offset);
 int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
net/batman-adv/network-coding.c +1 -1
index 32f9fa1..38fbecc 100644
@@ -1905,7 +1905,7 @@ int batadv_nc_nodes_seq_print_text(struct seq_file *seq, void *offset)
 	struct batadv_nc_node *nc_node;
 	int i;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/originator.c +75 -12

129 lines not on this page · raw message

net/batman-adv/originator.h +6 -1
index 64a8951..ba5a915 100644
@@ -29,6 +29,7 @@
 #include <linux/stddef.h>
 #include <linux/types.h>
 
+#include "hard-interface.h"
 #include "hash.h"
 
 struct seq_file;

@@ -71,7 +72,11 @@ batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node,
 		       struct batadv_hard_iface *if_outgoing);
 void batadv_orig_ifinfo_put(struct batadv_orig_ifinfo *orig_ifinfo);
 
-int batadv_orig_seq_print_text(struct seq_file *seq, void *offset);
+void *batadv_orig_seq_start(struct seq_file *seq, loff_t *pos);
+void *batadv_orig_seq_next(struct seq_file *seq, void *v, loff_t *pos);
+int batadv_orig_seq_show(struct seq_file *seq, void *v);
+void batadv_orig_seq_stop(struct seq_file *seq, void *v);
+
 int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset);
 int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
 			    int max_if_num);
net/batman-adv/translation-table.c +2 -2
index 2ed55f4..eab36a9 100644
@@ -1001,7 +1001,7 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset)
 	bool no_purge;
 	u16 np_flag = BATADV_TT_CLIENT_NOPURGE;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
 

@@ -1699,7 +1699,7 @@ int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset)
 	struct hlist_head *head;
 	u32 i;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/types.h +28 -2
index 9abfb3e..764332e 100644
@@ -1297,8 +1297,12 @@ struct batadv_algo_ops {
 	void (*bat_neigh_print)(struct batadv_priv *priv, struct seq_file *seq);
 	void (*bat_neigh_free)(struct batadv_neigh_node *neigh);
 	/* orig_node handling API */
-	void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq,
-			       struct batadv_hard_iface *hard_iface);
+	void (*bat_orig_seq_header)(struct batadv_priv *priv,
+				    struct seq_file *seq);
+	void (*bat_orig_seq_show)(struct batadv_priv *priv,
+				  struct seq_file *seq,
+				  struct batadv_orig_node *orig_node,
+				  struct batadv_hard_iface *if_outgoing);
 	void (*bat_orig_free)(struct batadv_orig_node *orig_node);
 	int (*bat_orig_add_if)(struct batadv_orig_node *orig_node,
 			       int max_if_num);

@@ -1403,4 +1407,26 @@ enum batadv_tvlv_handler_flags {
 	BATADV_TVLV_HANDLER_OGM_CALLED = BIT(2),
 };
 
+/**
+ * struct batadv_seq_private - private data of seq_open
+ * @net_dev: network device the seq private data belongs to
+ */
+struct batadv_seq_private {
+	struct net_device *net_dev;
+};
+
+/**
+ * struct batadv_seq_hash_iter - private data of seq_open for hash iterators
+ * @p: standard batadv_seq_private data
+ * @header_shown: whether header was already shown
+ * @bucket: current hash bucket
+ * @entry: current hash entry
+ */
+struct batadv_seq_hash_iter {
+	struct batadv_seq_private p;
+	int header_shown;
+	u32 bucket;
+	struct hlist_node *entry;
+};
+
 #endif /* _NET_BATMAN_ADV_TYPES_H_ */
maintainer
#5 lore raw
Quoted 9 lines · On Sunday 28 February 2016 17:23:18 Sven Eckelmann wrote:
Quoted 3 lines · On Sunday 28 February 2016 00:39:08 Philipp Psurek wrote:

Hi all,

I've got this error with

[..]

Quoted 1 line

----------------------------------

Quoted 7 lines

[..]

Quoted 1 line

[Feb28 00:13] batctl: page allocation failure: order:4, mode:0x40d0

Does this always happen when you use batctl o on a system with many entries in the originator table? When yes, then you could try the attached (very rough) proof-of-concept patch. It is based on v2016.0-92-gd7c9a9e

Hm, looks like I would have to implement better position selection to get this really working. Right now it stops printing when a page is full. I have added a minor modification that tries to continue the originator output after it was stopped in the middle of a print.

Kind regards,
Sven

From: Sven Eckelmann <[email protected]>
Date: Sun, 28 Feb 2016 17:13:12 +0100
Subject: [RFC v2] TEST: speedup originator output by using seq_operations

---
 net/batman-adv/bat_iv_ogm.c            |  93 +++++++++++----------------
 net/batman-adv/bat_v.c                 |  91 +++++++++++----------------
 net/batman-adv/bridge_loop_avoidance.c |   4 +-
 net/batman-adv/debugfs.c               |  50 ++++++++++++++-
 net/batman-adv/distributed-arp-table.c |   2 +-
 net/batman-adv/gateway_client.c        |   2 +-
 net/batman-adv/main.c                  |   5 +-
 net/batman-adv/main.h                  |   3 +-
 net/batman-adv/network-coding.c        |   2 +-
 net/batman-adv/originator.c            | 112 +++++++++++++++++++++++++++++----
 net/batman-adv/originator.h            |   7 ++-
 net/batman-adv/translation-table.c     |   4 +-
 net/batman-adv/types.h                 |  30 ++++++++-
 13 files changed, 266 insertions(+), 139 deletions(-)
net/batman-adv/bat_iv_ogm.c +37 -56
index 2c65668..cddb3e8 100644
@@ -1846,74 +1846,54 @@ batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node,
 	}
 }
 
-/**
- * batadv_iv_ogm_orig_print - print the originator table
- * @bat_priv: the bat priv with all the soft interface information
- * @seq: debugfs table seq_file struct
- * @if_outgoing: the outgoing interface for which this should be printed
- */
-static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv,
-				     struct seq_file *seq,
-				     struct batadv_hard_iface *if_outgoing)
+static void batadv_iv_ogm_oriq_seq_header(struct batadv_priv *bat_priv,
+					  struct seq_file *seq)
 {
-	struct batadv_neigh_node *neigh_node;
-	struct batadv_hashtable *hash = bat_priv->orig_hash;
-	int last_seen_msecs, last_seen_secs;
-	struct batadv_orig_node *orig_node;
-	struct batadv_neigh_ifinfo *n_ifinfo;
-	unsigned long last_seen_jiffies;
-	struct hlist_head *head;
-	int batman_count = 0;
-	u32 i;
-
 	seq_printf(seq, "  %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
 		   "Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE,
 		   "Nexthop", "outgoingIF", "Potential nexthops");
+}
 
-	for (i = 0; i < hash->size; i++) {
-		head = &hash->table[i];
+static void batadv_iv_ogm_orig_seq_show(struct batadv_priv *bat_priv,
+					struct seq_file *seq,
+					struct batadv_orig_node *orig_node,
+					struct batadv_hard_iface *if_outgoing)
+{
+	struct batadv_neigh_node *neigh_node;
+	int last_seen_msecs, last_seen_secs;
+	struct batadv_neigh_ifinfo *n_ifinfo;
+	unsigned long last_seen_jiffies;
 
-		rcu_read_lock();
-		hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
-			neigh_node = batadv_orig_router_get(orig_node,
-							    if_outgoing);
-			if (!neigh_node)
-				continue;
+	neigh_node = batadv_orig_router_get(orig_node, if_outgoing);
+	if (!neigh_node)
+		return;
 
-			n_ifinfo = batadv_neigh_ifinfo_get(neigh_node,
-							   if_outgoing);
-			if (!n_ifinfo)
-				goto next;
+	n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing);
+	if (!n_ifinfo)
+		goto next;
 
-			if (n_ifinfo->bat_iv.tq_avg == 0)
-				goto next;
+	if (n_ifinfo->bat_iv.tq_avg == 0)
+		goto next;
 
-			last_seen_jiffies = jiffies - orig_node->last_seen;
-			last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
-			last_seen_secs = last_seen_msecs / 1000;
-			last_seen_msecs = last_seen_msecs % 1000;
+	last_seen_jiffies = jiffies - orig_node->last_seen;
+	last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
+	last_seen_secs = last_seen_msecs / 1000;
+	last_seen_msecs = last_seen_msecs % 1000;
 
-			seq_printf(seq, "%pM %4i.%03is   (%3i) %pM [%10s]:",
-				   orig_node->orig, last_seen_secs,
-				   last_seen_msecs, n_ifinfo->bat_iv.tq_avg,
-				   neigh_node->addr,
-				   neigh_node->if_incoming->net_dev->name);
+	seq_printf(seq, "%pM %4i.%03is   (%3i) %pM [%10s]:",
+			orig_node->orig, last_seen_secs,
+			last_seen_msecs, n_ifinfo->bat_iv.tq_avg,
+			neigh_node->addr,
+			neigh_node->if_incoming->net_dev->name);
 
-			batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing,
-						       seq);
-			seq_puts(seq, "\n");
-			batman_count++;
+	batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing,
+					seq);
+	seq_puts(seq, "\n");
 
 next:
-			batadv_neigh_node_put(neigh_node);
-			if (n_ifinfo)
-				batadv_neigh_ifinfo_put(n_ifinfo);
-		}
-		rcu_read_unlock();
-	}
-
-	if (batman_count == 0)
-		seq_puts(seq, "No batman nodes in range ...\n");
+	batadv_neigh_node_put(neigh_node);
+	if (n_ifinfo)
+		batadv_neigh_ifinfo_put(n_ifinfo);
 }
 
 /**

@@ -2062,7 +2042,8 @@ static struct batadv_algo_ops batadv_batman_iv __read_mostly = {
 	.bat_neigh_cmp = batadv_iv_ogm_neigh_cmp,
 	.bat_neigh_is_similar_or_better = batadv_iv_ogm_neigh_is_sob,
 	.bat_neigh_print = batadv_iv_neigh_print,
-	.bat_orig_print = batadv_iv_ogm_orig_print,
+	.bat_orig_seq_header = batadv_iv_ogm_oriq_seq_header,
+	.bat_orig_seq_show = batadv_iv_ogm_orig_seq_show,
 	.bat_orig_free = batadv_iv_ogm_orig_free,
 	.bat_orig_add_if = batadv_iv_ogm_orig_add_if,
 	.bat_orig_del_if = batadv_iv_ogm_orig_del_if,
net/batman-adv/bat_v.c +36 -55

115 lines not on this page · raw message

net/batman-adv/bridge_loop_avoidance.c +2 -2
index 642167f..c00b9b8 100644
@@ -1807,7 +1807,7 @@ int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset)
 	bool is_own;
 	u8 *primary_addr;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
 

@@ -1865,7 +1865,7 @@ int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, void *offset)
 	bool is_own;
 	u8 *primary_addr;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/debugfs.c +47 -3

71 lines not on this page · raw message

net/batman-adv/distributed-arp-table.c +1 -1
index 919a8d2..dc553e5 100644
@@ -809,7 +809,7 @@ int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset)
 	int last_seen_msecs, last_seen_secs, last_seen_mins;
 	u32 i;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/gateway_client.c +1 -1
index c59aff5..1c2360c 100644
@@ -637,7 +637,7 @@ int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset)
 	struct batadv_gw_node *gw_node;
 	int gw_count = 0;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/main.c +3 -2
index d64ddb9..74c81eb 100644
@@ -269,13 +269,14 @@ bool batadv_is_my_mac(struct batadv_priv *bat_priv, const u8 *addr)
  * batadv_seq_print_text_primary_if_get - called from debugfs table printing
  *  function that requires the primary interface
  * @seq: debugfs table seq_file struct
+ * @net_dev: batman-adv net_device
  *
  * Return: primary interface if found or NULL otherwise.
  */
 struct batadv_hard_iface *
-batadv_seq_print_text_primary_if_get(struct seq_file *seq)
+batadv_seq_print_text_primary_if_get(struct seq_file *seq,
+				     struct net_device *net_dev)
 {
-	struct net_device *net_dev = (struct net_device *)seq->private;
 	struct batadv_priv *bat_priv = netdev_priv(net_dev);
 	struct batadv_hard_iface *primary_if;
net/batman-adv/main.h +2 -1
index e602408..94e9f57 100644
@@ -203,7 +203,8 @@ int batadv_mesh_init(struct net_device *soft_iface);
 void batadv_mesh_free(struct net_device *soft_iface);
 bool batadv_is_my_mac(struct batadv_priv *bat_priv, const u8 *addr);
 struct batadv_hard_iface *
-batadv_seq_print_text_primary_if_get(struct seq_file *seq);
+batadv_seq_print_text_primary_if_get(struct seq_file *seq,
+				     struct net_device *net_dev);
 int batadv_max_header_len(void);
 void batadv_skb_set_priority(struct sk_buff *skb, int offset);
 int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
net/batman-adv/network-coding.c +1 -1
index 32f9fa1..38fbecc 100644
@@ -1905,7 +1905,7 @@ int batadv_nc_nodes_seq_print_text(struct seq_file *seq, void *offset)
 	struct batadv_nc_node *nc_node;
 	int i;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/originator.c +100 -12

154 lines not on this page · raw message

net/batman-adv/originator.h +6 -1
index 64a8951..ba5a915 100644
@@ -29,6 +29,7 @@
 #include <linux/stddef.h>
 #include <linux/types.h>
 
+#include "hard-interface.h"
 #include "hash.h"
 
 struct seq_file;

@@ -71,7 +72,11 @@ batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node,
 		       struct batadv_hard_iface *if_outgoing);
 void batadv_orig_ifinfo_put(struct batadv_orig_ifinfo *orig_ifinfo);
 
-int batadv_orig_seq_print_text(struct seq_file *seq, void *offset);
+void *batadv_orig_seq_start(struct seq_file *seq, loff_t *pos);
+void *batadv_orig_seq_next(struct seq_file *seq, void *v, loff_t *pos);
+int batadv_orig_seq_show(struct seq_file *seq, void *v);
+void batadv_orig_seq_stop(struct seq_file *seq, void *v);
+
 int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset);
 int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
 			    int max_if_num);
net/batman-adv/translation-table.c +2 -2
index 2ed55f4..eab36a9 100644
@@ -1001,7 +1001,7 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset)
 	bool no_purge;
 	u16 np_flag = BATADV_TT_CLIENT_NOPURGE;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
 

@@ -1699,7 +1699,7 @@ int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset)
 	struct hlist_head *head;
 	u32 i;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/types.h +28 -2
index 9abfb3e..764332e 100644
@@ -1297,8 +1297,12 @@ struct batadv_algo_ops {
 	void (*bat_neigh_print)(struct batadv_priv *priv, struct seq_file *seq);
 	void (*bat_neigh_free)(struct batadv_neigh_node *neigh);
 	/* orig_node handling API */
-	void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq,
-			       struct batadv_hard_iface *hard_iface);
+	void (*bat_orig_seq_header)(struct batadv_priv *priv,
+				    struct seq_file *seq);
+	void (*bat_orig_seq_show)(struct batadv_priv *priv,
+				  struct seq_file *seq,
+				  struct batadv_orig_node *orig_node,
+				  struct batadv_hard_iface *if_outgoing);
 	void (*bat_orig_free)(struct batadv_orig_node *orig_node);
 	int (*bat_orig_add_if)(struct batadv_orig_node *orig_node,
 			       int max_if_num);

@@ -1403,4 +1407,26 @@ enum batadv_tvlv_handler_flags {
 	BATADV_TVLV_HANDLER_OGM_CALLED = BIT(2),
 };
 
+/**
+ * struct batadv_seq_private - private data of seq_open
+ * @net_dev: network device the seq private data belongs to
+ */
+struct batadv_seq_private {
+	struct net_device *net_dev;
+};
+
+/**
+ * struct batadv_seq_hash_iter - private data of seq_open for hash iterators
+ * @p: standard batadv_seq_private data
+ * @header_shown: whether header was already shown
+ * @bucket: current hash bucket
+ * @entry: current hash entry
+ */
+struct batadv_seq_hash_iter {
+	struct batadv_seq_private p;
+	int header_shown;
+	u32 bucket;
+	struct hlist_node *entry;
+};
+
 #endif /* _NET_BATMAN_ADV_TYPES_H_ */
author
#6 lore raw

Hi Sven,

I applied your patch. Besides a compilation warning

/root/git/batman-adv/net/batman-adv/originator.c: In function 'batadv_orig_hardif_seq_print_text':
/root/git/batman-adv/net/batman-adv/originator.c:1364:22: warning: unused variable 'bat_priv' [-Wunused-variable]

  struct batadv_priv *bat_priv;
                      ^

there is no error.

# batctl -v
batctl 2016.0-4-g7a3d563 [batman-adv: 2016.0-92-gd7c9a9e-dirty]

this is interesting:

batctl o | wc -l
9320

the other nodes tell me 335 or 341 or …

I'm sorry I'm not able to reproduce this issue any more and thank you for your work for B.A.T.M.A.N. advanced.

best regards,
Philipp

author
#7 lore raw
Quoted 4 lines

this is interesting:

batctl o | wc -l
9320

more interesting:

# while true; do batctl o | wc -l; done
9474
9474
[…]
# while true; do batctl o | sort -u | wc -l; done
1764
1427
1705
1746
1568
1559
1558
1543
1429
1441
1506
1415
1429
1544
1605
1457
1497
1428
1447
1443
1423
1422
1495
1424
1427
…
maintainer
#8 lore raw
Quoted 4 lines · On Sunday 28 February 2016 18:42:24 Philipp Psurek wrote:
Quoted 4 lines

this is interesting:

batctl o | wc -l
9320

Yes, there was a line missing in my last patch

net/batman-adv/originator.c +1 -0
@@ -1298,6 +1298,7 @@ void *batadv_orig_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 	struct batadv_hashtable *hash = bat_priv->orig_hash;
 	struct hlist_head *head;
 
+	++*pos;
 	if (v == SEQ_START_TOKEN) {
 		iter->bucket = 0;
 		iter->entry = NULL;

The complete version is attached. But I doubt it makes much sense when you don't have the problem anymore.

Kind regards,
Sven

From: Sven Eckelmann <[email protected]>
Date: Sun, 28 Feb 2016 17:13:12 +0100
Subject: [PATCH] TEST: speedup originator output by using seq_operations

---
 net/batman-adv/bat_iv_ogm.c            |  93 +++++++++++---------------
 net/batman-adv/bat_v.c                 |  91 +++++++++++---------------
 net/batman-adv/bridge_loop_avoidance.c |   4 +-
 net/batman-adv/debugfs.c               |  50 +++++++++++++-
 net/batman-adv/distributed-arp-table.c |   2 +-
 net/batman-adv/gateway_client.c        |   2 +-
 net/batman-adv/main.c                  |   5 +-
 net/batman-adv/main.h                  |   3 +-
 net/batman-adv/network-coding.c        |   2 +-
 net/batman-adv/originator.c            | 115 +++++++++++++++++++++++++++++----
 net/batman-adv/originator.h            |   7 +-
 net/batman-adv/translation-table.c     |   4 +-
 net/batman-adv/types.h                 |  30 ++++++++-
 13 files changed, 268 insertions(+), 140 deletions(-)
net/batman-adv/bat_iv_ogm.c +37 -56

118 lines not on this page · raw message

net/batman-adv/bat_v.c +36 -55

115 lines not on this page · raw message

net/batman-adv/bridge_loop_avoidance.c +2 -2
index 642167f..c00b9b8 100644
@@ -1807,7 +1807,7 @@ int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset)
 	bool is_own;
 	u8 *primary_addr;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
 

@@ -1865,7 +1865,7 @@ int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, void *offset)
 	bool is_own;
 	u8 *primary_addr;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/debugfs.c +47 -3

71 lines not on this page · raw message

net/batman-adv/distributed-arp-table.c +1 -1
index 919a8d2..dc553e5 100644
@@ -809,7 +809,7 @@ int batadv_dat_cache_seq_print_text(struct seq_file *seq, void *offset)
 	int last_seen_msecs, last_seen_secs, last_seen_mins;
 	u32 i;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/gateway_client.c +1 -1
index c59aff5..1c2360c 100644
@@ -637,7 +637,7 @@ int batadv_gw_client_seq_print_text(struct seq_file *seq, void *offset)
 	struct batadv_gw_node *gw_node;
 	int gw_count = 0;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/main.c +3 -2
index d64ddb9..74c81eb 100644
@@ -269,13 +269,14 @@ bool batadv_is_my_mac(struct batadv_priv *bat_priv, const u8 *addr)
  * batadv_seq_print_text_primary_if_get - called from debugfs table printing
  *  function that requires the primary interface
  * @seq: debugfs table seq_file struct
+ * @net_dev: batman-adv net_device
  *
  * Return: primary interface if found or NULL otherwise.
  */
 struct batadv_hard_iface *
-batadv_seq_print_text_primary_if_get(struct seq_file *seq)
+batadv_seq_print_text_primary_if_get(struct seq_file *seq,
+				     struct net_device *net_dev)
 {
-	struct net_device *net_dev = (struct net_device *)seq->private;
 	struct batadv_priv *bat_priv = netdev_priv(net_dev);
 	struct batadv_hard_iface *primary_if;
net/batman-adv/main.h +2 -1
index e602408..94e9f57 100644
@@ -203,7 +203,8 @@ int batadv_mesh_init(struct net_device *soft_iface);
 void batadv_mesh_free(struct net_device *soft_iface);
 bool batadv_is_my_mac(struct batadv_priv *bat_priv, const u8 *addr);
 struct batadv_hard_iface *
-batadv_seq_print_text_primary_if_get(struct seq_file *seq);
+batadv_seq_print_text_primary_if_get(struct seq_file *seq,
+				     struct net_device *net_dev);
 int batadv_max_header_len(void);
 void batadv_skb_set_priority(struct sk_buff *skb, int offset);
 int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
net/batman-adv/network-coding.c +1 -1
index 32f9fa1..38fbecc 100644
@@ -1905,7 +1905,7 @@ int batadv_nc_nodes_seq_print_text(struct seq_file *seq, void *offset)
 	struct batadv_nc_node *nc_node;
 	int i;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/originator.c +102 -13

163 lines not on this page · raw message

net/batman-adv/originator.h +6 -1
index 64a8951..ba5a915 100644
@@ -29,6 +29,7 @@
 #include <linux/stddef.h>
 #include <linux/types.h>
 
+#include "hard-interface.h"
 #include "hash.h"
 
 struct seq_file;

@@ -71,7 +72,11 @@ batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node,
 		       struct batadv_hard_iface *if_outgoing);
 void batadv_orig_ifinfo_put(struct batadv_orig_ifinfo *orig_ifinfo);
 
-int batadv_orig_seq_print_text(struct seq_file *seq, void *offset);
+void *batadv_orig_seq_start(struct seq_file *seq, loff_t *pos);
+void *batadv_orig_seq_next(struct seq_file *seq, void *v, loff_t *pos);
+int batadv_orig_seq_show(struct seq_file *seq, void *v);
+void batadv_orig_seq_stop(struct seq_file *seq, void *v);
+
 int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset);
 int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
 			    int max_if_num);
net/batman-adv/translation-table.c +2 -2
index 2ed55f4..eab36a9 100644
@@ -1001,7 +1001,7 @@ int batadv_tt_local_seq_print_text(struct seq_file *seq, void *offset)
 	bool no_purge;
 	u16 np_flag = BATADV_TT_CLIENT_NOPURGE;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
 

@@ -1699,7 +1699,7 @@ int batadv_tt_global_seq_print_text(struct seq_file *seq, void *offset)
 	struct hlist_head *head;
 	u32 i;
 
-	primary_if = batadv_seq_print_text_primary_if_get(seq);
+	primary_if = batadv_seq_print_text_primary_if_get(seq, net_dev);
 	if (!primary_if)
 		goto out;
net/batman-adv/types.h +28 -2
index 9abfb3e..764332e 100644
@@ -1297,8 +1297,12 @@ struct batadv_algo_ops {
 	void (*bat_neigh_print)(struct batadv_priv *priv, struct seq_file *seq);
 	void (*bat_neigh_free)(struct batadv_neigh_node *neigh);
 	/* orig_node handling API */
-	void (*bat_orig_print)(struct batadv_priv *priv, struct seq_file *seq,
-			       struct batadv_hard_iface *hard_iface);
+	void (*bat_orig_seq_header)(struct batadv_priv *priv,
+				    struct seq_file *seq);
+	void (*bat_orig_seq_show)(struct batadv_priv *priv,
+				  struct seq_file *seq,
+				  struct batadv_orig_node *orig_node,
+				  struct batadv_hard_iface *if_outgoing);
 	void (*bat_orig_free)(struct batadv_orig_node *orig_node);
 	int (*bat_orig_add_if)(struct batadv_orig_node *orig_node,
 			       int max_if_num);

@@ -1403,4 +1407,26 @@ enum batadv_tvlv_handler_flags {
 	BATADV_TVLV_HANDLER_OGM_CALLED = BIT(2),
 };
 
+/**
+ * struct batadv_seq_private - private data of seq_open
+ * @net_dev: network device the seq private data belongs to
+ */
+struct batadv_seq_private {
+	struct net_device *net_dev;
+};
+
+/**
+ * struct batadv_seq_hash_iter - private data of seq_open for hash iterators
+ * @p: standard batadv_seq_private data
+ * @header_shown: whether header was already shown
+ * @bucket: current hash bucket
+ * @entry: current hash entry
+ */
+struct batadv_seq_hash_iter {
+	struct batadv_seq_private p;
+	int header_shown;
+	u32 bucket;
+	struct hlist_node *entry;
+};
+
 #endif /* _NET_BATMAN_ADV_TYPES_H_ */
author
#9 lore raw
In reply to Sven Eckelmann

Hi Sven,

as already mentioned the failure does not happen any more. I'm sorry bothering you with this unreproducible issue.

Am Sonntag, den 28.02.2016, 17:23 +0100 schrieb Sven Eckelmann:

Quoted 7 lines · On Sunday 28 February 2016 00:39:08 Philipp Psurek wrote:
Quoted 3 lines

Hi all,

I've got this error with

[..]

Quoted 2 lines
Quoted 6 lines
Quoted 1 line

----------------------------------

[..]

Quoted 1 line

[Feb28 00:13] batctl: page allocation failure: order:4, mode:0x40d0

Does this always happen when you use batctl o on a system with many entries in the originator table?

I never saw this failure before. Executing

# batctl o | wc -l
338

on an 32 MiB RAM router was never a problem. I thought it would be the best reporting this issue.

Quoted 2 lines

When yes, then you could try the attached (very rough) proof-of -concept patch. It is based on v2016.0-92-gd7c9a9e

You are a faster coder than me as email writer. I'll implement the Patch in your 2nd email and report.

Best regards,
Philipp