mm: cma: /proc/cmainfo
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- v1 Latest3 patches 35 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | stacktrace: add seq_print_stack_trace()include/ kernel/ | +21 | 1 reply | |
| 2/3 | mm: cma: introduce /proc/cmainfomm/ | +202 | 10 replies | |
| 3/3 | cma: add functions to get region pages countersinclude/ mm/ | +36 | 7 replies |
Reviews trailers per patch
2 of 3 patches have a Reviewed-by or Acked-by.
| Patch | Michal Nazarewicz | SeongJae Park |
|---|---|---|
| 1/3 | R-b | |
| 2/3 | ||
| 3/3 | A-b |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH 0/3] mm: cma: /proc/cmainfo
Hello all,
Here is a patch set that adds /proc/cmainfo.
When compiled with CONFIG_CMA_DEBUG /proc/cmainfo will contain information about about total, used, maximum free contiguous chunk and all currently allocated contiguous buffers in CMA regions. The information about allocated CMA buffers includes pid, comm, allocation latency and stacktrace at the moment of allocation.
Example:
# cat /proc/cmainfo CMARegion stat: 65536 kB total, 248 kB used, 65216 kB max contiguous chunk
0x32400000 - 0x32401000 (4 kB), allocated by pid 63 (systemd-udevd), latency 74 us
[<c1006e96>] dma_generic_alloc_coherent+0x86/0x160 [<c13093af>] rpm_idle+0x1f/0x1f0 [<c1006e10>] dma_generic_alloc_coherent+0x0/0x160 [<f80a533e>] ohci_init+0x1fe/0x430 [ohci_hcd] [<c1006e10>] dma_generic_alloc_coherent+0x0/0x160 [<f801404f>] ohci_pci_reset+0x4f/0x60 [ohci_pci] [<f80f165c>] usb_add_hcd+0x1fc/0x900 [usbcore] [<c1256158>] pcibios_set_master+0x38/0x90 [<f8101ea6>] usb_hcd_pci_probe+0x176/0x4f0 [usbcore] [<c125852f>] pci_device_probe+0x6f/0xd0 [<c1199495>] sysfs_create_link+0x25/0x50 [<c1300522>] driver_probe_device+0x92/0x3b0 [<c14564fb>] __mutex_lock_slowpath+0x5b/0x90 [<c1300880>] __driver_attach+0x0/0x80 [<c13008f9>] __driver_attach+0x79/0x80 [<c1300880>] __driver_attach+0x0/0x80
0x32401000 - 0x32402000 (4 kB), allocated by pid 58 (systemd-udevd), latency 17 us
[<c130e370>] dmam_coherent_release+0x0/0x90 [<c112d76c>] __kmalloc_track_caller+0x31c/0x380 [<c1006e96>] dma_generic_alloc_coherent+0x86/0x160 [<c1006e10>] dma_generic_alloc_coherent+0x0/0x160 [<c130e226>] dmam_alloc_coherent+0xb6/0x100 [<f8125153>] ata_bmdma_port_start+0x43/0x60 [libata] [<f8113068>] ata_host_start.part.29+0xb8/0x190 [libata] [<c13624a0>] pci_read+0x30/0x40 [<f8124eb9>] ata_pci_sff_activate_host+0x29/0x220 [libata] [<f8127050>] ata_bmdma_interrupt+0x0/0x1f0 [libata] [<c1256158>] pcibios_set_master+0x38/0x90 [<f80ad9be>] piix_init_one+0x44e/0x630 [ata_piix] [<c1455ef0>] mutex_lock+0x10/0x20 [<c1197093>] kernfs_activate+0x63/0xd0 [<c11971c3>] kernfs_add_one+0xc3/0x130 [<c125852f>] pci_device_probe+0x6f/0xd0
<...>
Dmitry Safonov (1):
cma: add functions to get region pages counters
Stefan I. Strogin (2):
stacktrace: add seq_print_stack_trace()
mm: cma: introduce /proc/cmainfo
include/linux/cma.h | 2 + include/linux/stacktrace.h | 4 + kernel/stacktrace.c | 17 ++++ mm/cma.c | 236 +++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 259 insertions(+)
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