Bug 42362
| Summary: | [ext4] possible circular locking dependency detected | ||
|---|---|---|---|
| Product: | File System | Reporter: | Ivan Bulatovic (combuster) |
| Component: | ext4 | Assignee: | fs_ext4 (fs_ext4) |
| Status: | RESOLVED OBSOLETE | ||
| Severity: | normal | CC: | kpraveen.lkml, szg00000, xerofoify |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 3.0.1-rc3 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
Please test this bug to if it's fixed on the latest kernels. Cheers Nick No problems with 4.6.0-rc5. Too late to bisect now, so marking this as resolved. |
I found this after I've noticed that transfering files from my camera (Sony HX9V) withing shotwell is painfully slow. I'm not sure if this is the culprit but I wanted to report this nevertheless... Here is dmesg output: [ 137.861302] ======================================================= [ 137.861304] [ INFO: possible circular locking dependency detected ] [ 137.861306] 3.1.0-rc3-RC #1 [ 137.861307] ------------------------------------------------------- [ 137.861309] shotwell/1250 is trying to acquire lock: [ 137.861311] (&sb->s_type->i_mutex_key#10){+.+.+.}, at: [<ffffffffa00a5a46>] ext4_evict_inode+0x1e/0x2c6 [ext4] [ 137.861321] [ 137.861321] but task is already holding lock: [ 137.861323] (&mm->mmap_sem){++++++}, at: [<ffffffff810bf2ae>] sys_munmap+0x36/0x5b [ 137.861329] [ 137.861329] which lock already depends on the new lock. [ 137.861330] [ 137.861331] [ 137.861331] the existing dependency chain (in reverse order) is: [ 137.861333] [ 137.861333] -> #1 (&mm->mmap_sem){++++++}: [ 137.861336] [<ffffffff8106bdf0>] check_prevs_add+0x8b/0x104 [ 137.861341] [<ffffffff8106c1ca>] validate_chain.isra.37+0x361/0x39d [ 137.861344] [<ffffffff8106c89a>] __lock_acquire+0x36f/0x3e8 [ 137.861346] [<ffffffff8106cd31>] lock_acquire+0x7e/0x99 [ 137.861349] [<ffffffff810b7ffd>] might_fault+0x7b/0x9e [ 137.861353] [<ffffffff810f0e2a>] filldir+0x6a/0xc2 [ 137.861357] [<ffffffffa009dd6d>] call_filldir+0x91/0xb8 [ext4] [ 137.861361] [<ffffffffa009df13>] ext4_dx_readdir+0x16f/0x1d2 [ext4] [ 137.861365] [<ffffffffa009e116>] ext4_readdir+0x68/0x37e [ext4] [ 137.861369] [<ffffffff810f1070>] vfs_readdir+0x76/0xac [ 137.861372] [<ffffffff810f1182>] sys_getdents+0x79/0xc9 [ 137.861375] [<ffffffff8135b512>] system_call_fastpath+0x16/0x1b [ 137.861378] [ 137.861379] -> #0 (&sb->s_type->i_mutex_key#10){+.+.+.}: [ 137.861382] [<ffffffff8106bbc6>] check_prev_add+0x68/0x207 [ 137.861385] [<ffffffff8106bdf0>] check_prevs_add+0x8b/0x104 [ 137.861387] [<ffffffff8106c1ca>] validate_chain.isra.37+0x361/0x39d [ 137.861390] [<ffffffff8106c89a>] __lock_acquire+0x36f/0x3e8 [ 137.861392] [<ffffffff8106cd31>] lock_acquire+0x7e/0x99 [ 137.861395] [<ffffffff81355060>] __mutex_lock_common+0x61/0x470 [ 137.861398] [<ffffffff81355556>] mutex_lock_nested+0x36/0x3b [ 137.861401] [<ffffffffa00a5a46>] ext4_evict_inode+0x1e/0x2c6 [ext4] [ 137.861406] [<ffffffff810f6c14>] evict+0xa1/0x15b [ 137.861409] [<ffffffff810f6e3f>] iput_final+0x171/0x17a [ 137.861411] [<ffffffff810f6e80>] iput+0x38/0x3c [ 137.861413] [<ffffffff810f3210>] dentry_iput+0x96/0xa6 [ 137.861415] [<ffffffff810f3bdf>] dentry_kill+0xaa/0xc1 [ 137.861418] [<ffffffff810f3ff2>] dput+0x10d/0x11d [ 137.861420] [<ffffffff810e42be>] __fput+0x18a/0x1a2 [ 137.861423] [<ffffffff810e42eb>] fput+0x15/0x17 [ 137.861425] [<ffffffff810bdfd6>] remove_vma+0x4c/0x7d [ 137.861427] [<ffffffff810bf154>] do_munmap+0x262/0x27b [ 137.861430] [<ffffffff810bf2bc>] sys_munmap+0x44/0x5b [ 137.861432] [<ffffffff8135b512>] system_call_fastpath+0x16/0x1b [ 137.861435] [ 137.861435] other info that might help us debug this: [ 137.861436] [ 137.861437] Possible unsafe locking scenario: [ 137.861438] [ 137.861439] CPU0 CPU1 [ 137.861440] ---- ---- [ 137.861441] lock(&mm->mmap_sem); [ 137.861443] lock(&sb->s_type->i_mutex_key); [ 137.861446] lock(&mm->mmap_sem); [ 137.861448] lock(&sb->s_type->i_mutex_key); [ 137.861450] [ 137.861450] *** DEADLOCK *** [ 137.861451] [ 137.861452] 1 lock held by shotwell/1250: [ 137.861453] #0: (&mm->mmap_sem){++++++}, at: [<ffffffff810bf2ae>] sys_munmap+0x36/0x5b [ 137.861457] [ 137.861458] stack backtrace: [ 137.861460] Pid: 1250, comm: shotwell Not tainted 3.1.0-rc3-RC #1 [ 137.861461] Call Trace: [ 137.861465] [<ffffffff8134770a>] print_circular_bug+0xcc/0xdd [ 137.861467] [<ffffffff8106bbc6>] check_prev_add+0x68/0x207 [ 137.861470] [<ffffffff8106bdf0>] check_prevs_add+0x8b/0x104 [ 137.861473] [<ffffffff8106c1ca>] validate_chain.isra.37+0x361/0x39d [ 137.861476] [<ffffffff8106c89a>] __lock_acquire+0x36f/0x3e8 [ 137.861479] [<ffffffff8106cd31>] lock_acquire+0x7e/0x99 [ 137.861484] [<ffffffffa00a5a46>] ? ext4_evict_inode+0x1e/0x2c6 [ext4] [ 137.861487] [<ffffffff81355060>] __mutex_lock_common+0x61/0x470 [ 137.861491] [<ffffffffa00a5a46>] ? ext4_evict_inode+0x1e/0x2c6 [ext4] [ 137.861496] [<ffffffffa00a5a46>] ? ext4_evict_inode+0x1e/0x2c6 [ext4] [ 137.861499] [<ffffffff8106cc3e>] ? __lock_release+0x8c/0x9c [ 137.861502] [<ffffffff81355556>] mutex_lock_nested+0x36/0x3b [ 137.861507] [<ffffffffa00a5a46>] ext4_evict_inode+0x1e/0x2c6 [ext4] [ 137.861512] [<ffffffffa00a5a28>] ? ext4_da_writepages+0x395/0x395 [ext4] [ 137.861514] [<ffffffff810f6c14>] evict+0xa1/0x15b [ 137.861517] [<ffffffff810f6e3f>] iput_final+0x171/0x17a [ 137.861519] [<ffffffff810f6e80>] iput+0x38/0x3c [ 137.861521] [<ffffffff810f3210>] dentry_iput+0x96/0xa6 [ 137.861523] [<ffffffff810f3bdf>] dentry_kill+0xaa/0xc1 [ 137.861525] [<ffffffff810f3ff2>] dput+0x10d/0x11d [ 137.861528] [<ffffffff810e42be>] __fput+0x18a/0x1a2 [ 137.861530] [<ffffffff810e42eb>] fput+0x15/0x17 [ 137.861533] [<ffffffff810bdfd6>] remove_vma+0x4c/0x7d [ 137.861535] [<ffffffff810bf154>] do_munmap+0x262/0x27b [ 137.861537] [<ffffffff810bf2bc>] sys_munmap+0x44/0x5b [ 137.861540] [<ffffffff8135b512>] system_call_fastpath+0x16/0x1b