Messages in this thread | | | Date | Thu, 21 Mar 2013 19:29:35 +0000 | From | Al Viro <> | Subject | Re: VFS deadlock ? |
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On Thu, Mar 21, 2013 at 03:06:53PM -0400, Dave Jones wrote:
> Showing all locks held in the system: > 4 locks on stack by trinity-child2/7669: > #0: blocked: (sb_writers#4){.+.+.+}, instance: ffff8801292d17d8, at: [<ffffffff811df134>] mnt_want_write+0x24/0x50 > #1: held: (&type->s_vfs_rename_key){+.+.+.}, instance: ffff8801292d1928, at: [<ffffffff811c6f5e>] lock_rename+0x3e/0x120 > #2: held: (&type->i_mutex_dir_key#2/1){+.+.+.}, instance: ffff880110b3a858, at: [<ffffffff811c701e>] lock_rename+0xfe/0x120 > #3: blocked: (&type->i_mutex_dir_key#2/2){+.+.+.}, instance: ffff880110b3a858, at: [<ffffffff811c7034>] lock_rename+0x114/0x120
#0 oddity aside, that looks very much like directory aliased by two different dentries. Try to add BUG_ON(p1->d_inode == p2->d_inode); just before mutex_lock(&p1->d_inode->i_sb->s_vfs_rename_mutex); and see if it triggers.
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