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| author | Milosz Tanski <milosz@adfin.com> | 2013-09-09 14:28:57 -0400 |
|---|---|---|
| committer | Sage Weil <sage@inktank.com> | 2013-09-10 09:04:46 -0700 |
| commit | 9c89d62948c4740e379a7e0085dd8d7c1561f53f (patch) | |
| tree | 38cd18d441d462defbc7653c21ab3e695526e41e /fs | |
| parent | da6a6b63978d45f9ae582d1f362f182012da3a22 (diff) | |
| download | linux-9c89d62948c4740e379a7e0085dd8d7c1561f53f.tar.gz linux-9c89d62948c4740e379a7e0085dd8d7c1561f53f.tar.bz2 linux-9c89d62948c4740e379a7e0085dd8d7c1561f53f.zip | |
fscache: check consistency does not decrement refcount
__fscache_check_consistency() does not decrement the count of operations
active after it finishes in the success case. This leads to a hung tasks on
cookie de-registration (commonly in inode eviction).
INFO: task kworker/1:2:4214 blocked for more than 120 seconds.
kworker/1:2 D ffff880443513fc0 0 4214 2 0x00000000
Workqueue: ceph-msgr con_work [libceph]
...
Call Trace:
[<ffffffff81569fc6>] ? _raw_spin_unlock_irqrestore+0x16/0x20
[<ffffffffa0016570>] ? fscache_wait_bit_interruptible+0x30/0x30 [fscache]
[<ffffffff81568d09>] schedule+0x29/0x70
[<ffffffffa001657e>] fscache_wait_atomic_t+0xe/0x20 [fscache]
[<ffffffff815665cf>] out_of_line_wait_on_atomic_t+0x9f/0xe0
[<ffffffff81083560>] ? autoremove_wake_function+0x40/0x40
[<ffffffffa0015a9c>] __fscache_relinquish_cookie+0x15c/0x310 [fscache]
[<ffffffffa00a4fae>] ceph_fscache_unregister_inode_cookie+0x3e/0x50 [ceph]
[<ffffffffa007e373>] ceph_destroy_inode+0x33/0x200 [ceph]
[<ffffffff811c13ae>] ? __fsnotify_inode_delete+0xe/0x10
[<ffffffff8119ba1c>] destroy_inode+0x3c/0x70
[<ffffffff8119bb69>] evict+0x119/0x1b0
Signed-off-by: Milosz Tanski <milosz@adfin.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/fscache/cookie.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c index 318e8433527c..b2a86e324aac 100644 --- a/fs/fscache/cookie.c +++ b/fs/fscache/cookie.c @@ -586,7 +586,8 @@ int __fscache_check_consistency(struct fscache_cookie *cookie) fscache_operation_init(op, NULL, NULL); op->flags = FSCACHE_OP_MYTHREAD | - (1 << FSCACHE_OP_WAITING); + (1 << FSCACHE_OP_WAITING) | + (1 << FSCACHE_OP_UNUSE_COOKIE); spin_lock(&cookie->lock); |