http://bugzilla.kernel.org/show_bug.cgi?id=13598 Summary: FIEMAP related circular locking dependency detected Product: File System Version: 2.5 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 AssignedTo: fs_ext4@xxxxxxxxxxxxxxxxxxxx ReportedBy: aneesh.kumar@xxxxxxxxxxxxxxxxxx Regression: No Have a bugzilla entry for tracking the problem. reported here http://article.gmane.org/gmane.comp.file-systems.ext4/13076 [ INFO: possible circular locking dependency detected ] 2.6.30-rc4-autokern1 #1 ------------------------------------------------------- a.out/5595 is trying to acquire lock: (&mm->mmap_sem){++++++}, at: [<c047f023>] might_fault+0x35/0x72 but task is already holding lock: (&ei->i_data_sem){++++..}, at: [<c04f2f71>] ext4_fiemap+0x139/0x191 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ei->i_data_sem){++++..}: [<c044817e>] validate_chain+0x89b/0xba1 [<c0448b28>] __lock_acquire+0x6a4/0x73c [<c0449d40>] lock_acquire+0xa8/0xc8 [<c06a6f91>] down_read+0x1e/0x5b [<c04e1a83>] ext4_get_blocks_wrap+0x28/0x27e [<c04e2782>] ext4_get_block+0x94/0xc9 [<c04b3171>] do_mpage_readpage+0x24b/0x5e0 [<c04b3620>] mpage_readpages+0x74/0xa8 [<c04e0edc>] ext4_readpages+0x14/0x16 [<c04732bd>] __do_page_cache_readahead+0x14f/0x1b8 [<c04736bf>] do_page_cache_readahead+0x42/0x53 [<c046e57b>] filemap_fault+0x194/0x3ad [<c047bea2>] __do_fault+0x3b/0x35c [<c047db7b>] handle_mm_fault+0x36d/0x7a9 [<c06aa208>] do_page_fault+0x28d/0x2f1 [<c06a8612>] error_code+0x72/0x78 [<ffffffff>] 0xffffffff -> #0 (&mm->mmap_sem){++++++}: [<c0447eb2>] validate_chain+0x5cf/0xba1 [<c0448b28>] __lock_acquire+0x6a4/0x73c [<c0449d40>] lock_acquire+0xa8/0xc8 [<c047f040>] might_fault+0x52/0x72 [<c0548f7d>] copy_to_user+0x28/0x3f [<c049bd9b>] fiemap_fill_next_extent+0x9e/0xc9 [<c04f2aef>] ext4_ext_fiemap_cb+0x1a7/0x1c1 [<c04f1cdd>] ext4_ext_walk_space+0x194/0x207 [<c04f2fb4>] ext4_fiemap+0x17c/0x191 [<c049c157>] do_vfs_ioctl+0x32a/0x4a6 [<c049c313>] sys_ioctl+0x40/0x5a [<c0402944>] sysenter_do_call+0x12/0x32 [<ffffffff>] 0xffffffff other info that might help us debug this: 1 lock held by a.out/5595: #0: (&ei->i_data_sem){++++..}, at: [<c04f2f71>] ext4_fiemap+0x139/0x191 stack backtrace: Pid: 5595, comm: a.out Not tainted 2.6.30-rc4-autokern1 #1 Call Trace: [<c04477e0>] print_circular_bug_tail+0xab/0xb6 [<c0447eb2>] validate_chain+0x5cf/0xba1 [<c0448b28>] __lock_acquire+0x6a4/0x73c [<c0449d40>] lock_acquire+0xa8/0xc8 [<c047f023>] ? might_fault+0x35/0x72 [<c047f040>] might_fault+0x52/0x72 [<c047f023>] ? might_fault+0x35/0x72 [<c0548f7d>] copy_to_user+0x28/0x3f [<c049bd9b>] fiemap_fill_next_extent+0x9e/0xc9 [<c04f2aef>] ext4_ext_fiemap_cb+0x1a7/0x1c1 [<c04f1cdd>] ext4_ext_walk_space+0x194/0x207 [<c04f2fb4>] ext4_fiemap+0x17c/0x191 [<c04f2948>] ? ext4_ext_fiemap_cb+0x0/0x1c1 [<c049c157>] do_vfs_ioctl+0x32a/0x4a6 [<c049c313>] sys_ioctl+0x40/0x5a [<c0402944>] sysenter_do_call+0x12/0x32 -- -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
