btrfs warnings from 2.6.39-rc5

Hi,

I'm not sure if they matter, but I got these warnings on one of the machines I'm using as a Ceph OSD server:

[ 1806.549469] ------------[ cut here ]------------
[ 1806.554593] WARNING: at fs/btrfs/extent-tree.c:5790
use_block_rsv+0xa7/0x101 [btrfs]()
[ 1806.562903] Hardware name: PowerEdge 1950
[ 1806.567126] Modules linked in: loop btrfs zlib_deflate lzo_compress
ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4
xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables
x_tables bridge stp i2c_dev i2c_core ext3 jbd ib_iser libi]
[ 1806.689084] Pid: 12025, comm: cosd Not tainted
2.6.39-rc5-00006-g7b0bd4b #2
[ 1806.697425] Call Trace:
[ 1806.700332] [<ffffffffa06fe816>] ? use_block_rsv+0xa7/0x101 [btrfs]
[ 1806.707032] [<ffffffff810494d8>] ? warn_slowpath_common+0x85/0x9e
[ 1806.713502] [<ffffffff8104950b>] ? warn_slowpath_null+0x1a/0x1c
[ 1806.720755] [<ffffffffa06fe816>] ? use_block_rsv+0xa7/0x101 [btrfs]
[ 1806.731488] [<ffffffffa070590b>] ? btrfs_alloc_free_block+0x30/0x198
[btrfs]
[ 1806.743858] [<ffffffffa072ae8a>] ?
map_private_extent_buffer+0xb2/0xd9 [btrfs]
[ 1806.752600] [<ffffffffa072a4b8>] ? __kmap_atomic+0x12/0x47 [btrfs]
[ 1806.760057] [<ffffffffa072b036>] ? read_extent_buffer+0xc2/0xd4 [btrfs]
[ 1806.770897] [<ffffffffa06f84ac>] ? __btrfs_cow_block+0x10e/0x2f5 [btrfs]
[ 1806.779552] [<ffffffffa0709dbe>] ? btrfs_header_generation+0x1f/0x25
[btrfs]
[ 1806.788994] [<ffffffffa06f878f>] ? btrfs_cow_block+0xfc/0x121 [btrfs]
[ 1806.798434] [<ffffffffa06fa746>] ? btrfs_search_slot+0x144/0x3ae [btrfs]
[ 1806.806444] [<ffffffffa0709877>] ? btrfs_lookup_inode+0x31/0x86 [btrfs]
[ 1806.813611] [<ffffffffa071618b>] ? btrfs_update_inode+0x52/0xc1 [btrfs]
[ 1806.820904] [<ffffffffa071668c>] ? btrfs_truncate+0x239/0x297 [btrfs]
[ 1806.829290] [<ffffffffa071bb23>] ? btrfs_setsize+0x8c/0x9b [btrfs]
[ 1806.835962] [<ffffffffa071bb93>] ? btrfs_setattr+0x61/0x9d [btrfs]
[ 1806.842892] [<ffffffff81127ea4>] ? notify_change+0x174/0x1bc
[ 1806.850878] [<ffffffff81110c4f>] ? do_truncate+0x6e/0x8a
[ 1806.857374] [<ffffffff8111b126>] ? generic_permission+0x1c/0x8e
[ 1806.868498] [<ffffffff81110e42>] ? do_sys_truncate+0xf8/0x10a
[ 1806.877746] [<ffffffff81110e62>] ? sys_truncate+0xe/0x10
[ 1806.902751] [<ffffffff813b6deb>] ? system_call_fastpath+0x16/0x1b
[ 1806.909736] ---[ end trace cd0ae33f1a4433d9 ]---
[ 1812.142333] ------------[ cut here ]------------
[ 1812.146996] WARNING: at fs/btrfs/inode.c:2180
btrfs_orphan_commit_root+0x8c/0xab [btrfs]()
[ 1812.155275] Hardware name: PowerEdge 1950
[ 1812.159280] Modules linked in: loop btrfs zlib_deflate lzo_compress
ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4
xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables
x_tables bridge stp i2c_dev i2c_core ext3 jbd ib_iser libi]
[ 1812.240872] Pid: 7923, comm: kworker/3:2 Tainted: G W
2.6.39-rc5-00006-g7b0bd4b #2
[ 1812.249216] Call Trace:
[ 1812.251712] [<ffffffffa0715048>] ? btrfs_orphan_commit_root+0x8c/0xab
[btrfs]
[ 1812.258976] [<ffffffff810494d8>] ? warn_slowpath_common+0x85/0x9e
[ 1812.265199] [<ffffffff8104950b>] ? warn_slowpath_null+0x1a/0x1c
[ 1812.271420] [<ffffffffa0715048>] ? btrfs_orphan_commit_root+0x8c/0xab
[btrfs]
[ 1812.278704] [<ffffffffa070f5e0>] ? commit_fs_roots+0x95/0xfd [btrfs]
[ 1812.285220] [<ffffffffa07039b3>] ? btrfs_run_delayed_refs+0x112/0x15e
[btrfs]
[ 1812.292459] [<ffffffff810367bf>] ? need_resched+0x23/0x2d
[ 1812.297961] [<ffffffff810367d7>] ? should_resched+0xe/0x2f
[ 1812.303604] [<ffffffffa07105e3>] ?
btrfs_commit_transaction+0x349/0x5a3 [btrfs]
[ 1812.310999] [<ffffffff8106622c>] ? list_del_init+0x21/0x21
[ 1812.316615] [<ffffffffa071085c>] ? do_async_commit+0x1f/0x2c [btrfs]
[ 1812.323055] [<ffffffff8106076b>] ? process_one_work+0x124/0x1e0
[ 1812.329083] [<ffffffffa071083d>] ?
btrfs_commit_transaction+0x5a3/0x5a3 [btrfs]
[ 1812.336526] [<ffffffff81061dd8>] ? workqueue_congested+0x1e/0x1e
[ 1812.342636] [<ffffffff81061e67>] ? worker_thread+0x8f/0x124
[ 1812.348353] [<ffffffff81065d26>] ? kthread+0x72/0x7a
[ 1812.353439] [<ffffffff813b7ed4>] ? kernel_thread_helper+0x4/0x10
[ 1812.359555] [<ffffffff813b07ad>] ? retint_restore_args+0xe/0xe
[ 1812.365484] [<ffffffff81065cb4>] ? kthread_bind+0x64/0x64
[ 1812.370986] [<ffffffff813b7ed0>] ? gs_change+0xb/0xb
[ 1812.376047] ---[ end trace cd0ae33f1a4433da ]---

Please let me know if I can do anything to help sort these out.

Quoted 8 lines · Jim Schutt

Hi,

I'm not sure if they matter, but I got these warnings on one of the machines I'm using as a Ceph OSD server:

[ 1806.549469] ------------[ cut here ]------------
[ 1806.554593] WARNING: at fs/btrfs/extent-tree.c:5790

use_block_rsv+0xa7/0x101 [btrfs]()

Quoted 3 lines

Please let me know if I can do anything to help sort these out.

I just posted a patch for this problem, it's titled

Btrfs: fix how we do space reservation for truncate

Please apply it and test it and see if it makes this problem go away.

Thanks,

Josef

Signature · 3 lines

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Quoted 8 lines · Jim Schutt

Hi,

I'm not sure if they matter, but I got these warnings on one of the machines I'm using as a Ceph OSD server:

[ 1806.549469] ------------[ cut here ]------------
[ 1806.554593] WARNING: at fs/btrfs/extent-tree.c:5790

use_block_rsv+0xa7/0x101 [btrfs]()

Quoted 2 lines

Please let me know if I can do anything to help sort these out.

I just posted a patch for this problem, it's titled

Btrfs: fix how we do space reservation for truncate

Please apply it and test it and see if it makes this problem go away.

Thanks,

Josef

Signature · 3 lines

To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Quoted 15 lines · Josef Bacik

Quoted 11 lines · Jim Schutt

Hi,

I'm not sure if they matter, but I got these warnings on one of the machines I'm using as a Ceph OSD server:

[ 1806.549469] ------------[ cut here ]------------
[ 1806.554593] WARNING: at fs/btrfs/extent-tree.c:5790

use_block_rsv+0xa7/0x101 [btrfs]()

Please let me know if I can do anything to help sort these out.

I just posted a patch for this problem, it's titled

Quoted 3 lines

Btrfs: fix how we do space reservation for truncate

Please apply it and test it and see if it makes this problem go away.

This patch has been working very well for me, thanks. I've had no sign of truncate trouble since I started using it.

-- Jim