On Saturday 06 January 2007 04:59, Andrew Morton wrote:
>
> http://userweb.kernel.org/~akpm/2.6.20-rc3-mm1x.bz2 is basically
> 2.6.20-rc3-mm1, minus git-block.patch. Can you and Torsten please test
> that, see if the hangs go away?
Works for me too.
Also the locking imbalance reported in Bugzilla-Bug 7775 has disapeared:
[ 24.587727] =====================================
[ 24.606374] [ BUG: bad unlock balance detected! ]
[ 24.620506] -------------------------------------
[ 24.634639] swapper/0 is trying to release lock (inode_lock) at:
[ 24.652797] [<c0184738>] generic_sync_sb_inodes+0xa8/0x2d0
[ 24.669345] but there are no more locks to release!
[ 24.683997]
[ 24.683998] other info that might help us debug this:
[ 24.703690] 1 lock held by swapper/0:
[ 24.714704] #0: (&type->s_umount_key){--..}, at: [<c0168fcc>]
sget+0x1cc/0x370
[ 24.737279]
[ 24.737280] stack backtrace:
[ 24.750452] [<c0138274>] print_unlock_inbalance_bug+0x104/0x120
[ 24.768558] [<c0184738>] generic_sync_sb_inodes+0xa8/0x2d0
[ 24.785366] [<c013942a>] trace_hardirqs_on+0xba/0x160
[ 24.800876] [<c012d9a8>] __kernel_text_address+0x18/0x30
[ 24.817162] [<c0104f66>] dump_trace+0x56/0xa0
[ 24.830594] [<c010a4bc>] save_stack_trace+0x1c/0x40
[ 24.845583] [<c01378b0>] save_trace+0x40/0xa0
[ 24.859013] [<c013795b>] add_lock_to_list+0x4b/0xc0
[ 24.874004] [<c0184738>] generic_sync_sb_inodes+0xa8/0x2d0
[ 24.890812] [<c0184738>] generic_sync_sb_inodes+0xa8/0x2d0
[ 24.907619] [<c013abee>] lock_release+0x8e/0x180
[ 24.921830] [<c041fd34>] _spin_unlock+0x14/0x20
[ 24.935780] [<c0184738>] generic_sync_sb_inodes+0xa8/0x2d0
[ 24.952589] [<c0184a03>] sync_inodes_sb+0x83/0xa0
[ 24.967058] [<c016917a>] __fsync_super+0xa/0x70
[ 24.980983] [<c01691e8>] fsync_super+0x8/0x20
[ 24.994387] [<c016922c>] do_remount_sb+0x2c/0x120
[ 25.008858] [<c01697f1>] get_sb_single+0x61/0xd0
[ 25.023067] [<c01a5540>] sysfs_fill_super+0x0/0xb0
[snip]
I now see this, but the system works:
[ 11.800000] Freeing unused kernel memory: 204k freed
[ 35.300000]
[ 35.300000] =============================================
[ 35.300000] [ INFO: possible recursive locking detected ]
[ 35.300000] 2.6.20-rc3-mm1x #0
[ 35.300000] ---------------------------------------------
[ 35.300000] mount/3795 is trying to acquire lock:
[ 35.300000] (&(&ip->i_lock)->mr_lock){----}, at: [<c020a1f1>]
xfs_ilock+0x71/0xa0
[ 35.300000]
[ 35.300000] but task is already holding lock:
[ 35.300000] (&(&ip->i_lock)->mr_lock){----}, at: [<c020a1f1>]
xfs_ilock+0x71/0xa0
[ 35.300000]
[ 35.300000] other info that might help us debug this:
[ 35.300000] 2 locks held by mount/3795:
[ 35.300000] #0: (&inode->i_mutex){--..}, at: [<c01721df>]
open_namei+0xef/0x610
[ 35.300000] #1: (&(&ip->i_lock)->mr_lock){----}, at: [<c020a1f1>]
xfs_ilock+0x71/0xa0
[ 35.300000]
[ 35.300000] stack backtrace:
[ 35.300000] [<c013a256>] __lock_acquire+0xa96/0x1020
[ 35.300000] [<c01393fa>] debug_check_no_locks_freed+0xca/0x180
[ 35.300000] [<c013a837>] lock_acquire+0x57/0x70
[ 35.300000] [<c020a1f1>] xfs_ilock+0x71/0xa0
[ 35.300000] [<c0133c3d>] down_write+0x3d/0x60
[ 35.300000] [<c020a1f1>] xfs_ilock+0x71/0xa0
[ 35.300000] [<c020a1f1>] xfs_ilock+0x71/0xa0
[ 35.300000] [<c020ae43>] xfs_iget+0x463/0x6f0
[ 35.300000] [<c02247e4>] xfs_trans_iget+0x104/0x170
[ 35.300000] [<c020f4ce>] xfs_ialloc+0xce/0x540
[ 35.300000] [<c0225395>] xfs_dir_ialloc+0x85/0x2e0
[ 35.300000] [<c020a1f1>] xfs_ilock+0x71/0xa0
[ 35.300000] [<c0133c3d>] down_write+0x3d/0x60
[ 35.300000] [<c022c125>] xfs_create+0x395/0x6c0
[ 35.300000] [<c020a155>] xfs_iunlock+0x75/0x90
[ 35.300000] [<c0236901>] xfs_vn_mknod+0x2c1/0x480
[ 35.300000] [<c01632c6>] kmem_cache_free+0x66/0x90
[ 35.300000] [<c013928a>] trace_hardirqs_on+0xba/0x160
[ 35.300000] [<c01f62e4>] xfs_da_brelse+0x74/0xc0
[ 35.300000] [<c01fd7f7>] xfs_dir2_leaf_lookup_int+0x237/0x270
[ 35.300000] [<c01fdd0e>] xfs_dir2_leaf_lookup+0x1e/0xa0
[ 35.300000] [<c01fa59e>] xfs_dir_lookup+0xee/0x100
[ 35.300000] [<c0229456>] xfs_access+0x26/0x50
[ 35.300000] [<c0178450>] d_rehash+0x20/0x50
[ 35.300000] [<c017926a>] d_alloc+0x12a/0x1d0
[ 35.300000] [<c016f374>] vfs_create+0xd4/0x130
[ 35.300000] [<c01726ab>] open_namei+0x5bb/0x610
[ 35.300000] [<c0165a0f>] get_unused_fd+0x1f/0xb0
[ 35.300000] [<c0154539>] __handle_mm_fault+0x179/0x8b0
[ 35.300000] [<c0165d4e>] do_filp_open+0x2e/0x60
[ 35.300000] [<c041fef4>] _spin_unlock+0x14/0x20
[ 35.300000] [<c0165a8c>] get_unused_fd+0x9c/0xb0
[ 35.300000] [<c0165dca>] do_sys_open+0x4a/0xe0
[ 35.300000] [<c0165e9c>] sys_open+0x1c/0x20
[ 35.300000] [<c0104022>] sysenter_past_esp+0x5f/0x99
[ 35.300000] =======================
[ 37.390000] kjournald starting. Commit interval 5 seconds
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