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Re: [xfs-masters] 2.6.29-rc: kernel BUG at fs/xfs/support/debug.c:108

To: Dave Chinner <david@xxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, xfs-masters@xxxxxxxxxxx, xfs@xxxxxxxxxxx, kernel-testers@xxxxxxxxxxxxxxx
Subject: Re: [xfs-masters] 2.6.29-rc: kernel BUG at fs/xfs/support/debug.c:108
From: Alexander Beregalov <a.beregalov@xxxxxxxxx>
Date: Tue, 20 Jan 2009 21:54:44 +0300
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Hi

Is it a new bug?
It is pre-2.6.29-rc1 kernel, which was supossed to be free of the bug
"fs_is_ok, file: fs/xfs/xfs_btree.c, line: 3327"

 Assertion failed: fsbno != NULLFSBLOCK, file: fs/xfs/xfs_btree.c, line: 816
 ------------[ cut here ]------------
 kernel BUG at fs/xfs/support/debug.c:81!
 invalid opcode: 0000 [#1] PREEMPT DEBUG_PAGEALLOC
 last sysfs file: /sys/devices/platform/w83627hf.656/name
 Modules linked in: w83627hf hwmon_vid i2c_nforce2

 Pid: 10156, comm: pdflush Not tainted (2.6.28-rc2-00207-g278d0ca #5)
 EIP: 0060:[<c029dbee>] EFLAGS: 00010282 CPU: 0
 EIP is at assfail+0x1e/0x30
 EAX: 0000005f EBX: f7325a10 ECX: d3a24000 EDX: 00000000
 ESI: ffffffff EDI: 00000001 EBP: d3a25880 ESP: d3a25870
  DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
 Process pdflush (pid: 10156, ti=d3a24000 task=f6223cf0 task.ti=d3a24000)
 Stack:
  c04d6c04 c04b6a80 c04b6da8 00000330 d3a2589c c024c01e f6aca408 00cc8bc4
  00000001 ffffffff 00000001 d3a258b4 c024c0e5 f0a45000 f0a45000 00000000
  00000001 d3a258cc c024c161 00000003 d3a25a04 f0a45000 f0a45000 d3a2590c
 Call Trace:
  [<c024c01e>] ? xfs_btree_reada_bufl+0x2e/0x80
  [<c024c0e5>] ? xfs_btree_readahead_lblock+0x75/0x80
  [<c024c161>] ? xfs_btree_readahead+0x71/0x90
  [<c024ca2c>] ? xfs_btree_decrement+0x3c/0x2e0
  [<c024998c>] ? xfs_bmbt_delete+0x2c/0xa0
  [<c0240d24>] ? xfs_bmap_add_extent_delay_real+0x1674/0x1700
  [<c040e987>] ? _spin_unlock+0x27/0x50
  [<c022a0cb>] ? xfs_alloc_search_busy+0x8b/0xd0
  [<c0180cfc>] ? slab_pad_check+0x3c/0x120
  [<c022dc19>] ? xfs_alloc_vextent+0x2e9/0x760
  [<c01806bd>] ? check_object+0x13d/0x200
  [<c0241a86>] ? xfs_bmap_add_extent+0x626/0x670
  [<c0246bac>] ? xfs_bmbt_init_cursor+0x2c/0x100
  [<c02454cb>] ? xfs_bmapi+0xfcb/0x1c90
  [<c01806bd>] ? check_object+0x13d/0x200
  [<c02711d4>] ? xfs_iomap_write_allocate+0x254/0x450
  [<c02723d7>] ? xfs_iomap+0x3a7/0x3f0
  [<c02b32e6>] ? submit_bio+0x66/0x100
  [<c029117e>] ? xfs_map_blocks+0x3e/0x90
  [<c0292cda>] ? xfs_page_state_convert+0x2ea/0x740
  [<c029325e>] ? xfs_vm_writepage+0x5e/0xf0
  [<c016420b>] ? __writepage+0xb/0x40
  [<c01651b1>] ? write_cache_pages+0x1f1/0x330
  [<c0164200>] ? __writepage+0x0/0x40
  [<c0165313>] ? generic_writepages+0x23/0x30
  [<c0291133>] ? xfs_vm_writepages+0x43/0x50
  [<c02910f0>] ? xfs_vm_writepages+0x0/0x50
  [<c016534e>] ? do_writepages+0x2e/0x50
  [<c019ff72>] ? __writeback_single_inode+0x82/0x320
  [<c040e3c3>] ? _spin_lock+0x63/0x70
  [<c01a057a>] ? generic_sync_sb_inodes+0x23a/0x320
  [<c01a0836>] ? writeback_inodes+0x56/0xe0
  [<c01644cb>] ? wb_kupdate+0x7b/0xf0
  [<c01658f0>] ? pdflush+0x0/0x180
  [<c01659b0>] ? pdflush+0xc0/0x180
  [<c0164450>] ? wb_kupdate+0x0/0xf0
  [<c013b6ea>] ? kthread+0x3a/0x70
  [<c013b6b0>] ? kthread+0x0/0x70
  [<c0104157>] ? kernel_thread_helper+0x7/0x10
 Code: 00 e8 97 73 02 00 c9 c3 90 8d 74 26 00 55 89 e5 83 ec 10 89 4c
24 0c 89 54 24 08 89 44 24 04 c7 04 24 04 6c 4d c0 e8 fb de 16 00 <0f>
0b eb fe 8d b4 26 00 00 00 00 8d bc 27 00 00 00 00 55 89 e5
 EIP: [<c029dbee>] assfail+0x1e/0x30 SS:ESP 0068:d3a25870

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