Date:	Thu, 02 Aug 2012 09:21:34 +0200
From:	Vincent ETIENNE <vetienne@...ogsys.com>
To:	Vincent ETIENNE <ve@...ienne.net>
CC:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Alexander Viro <viro@...iv.linux.org.uk>,
	ocfs2-devel@....oracle.com
Subject: Re: kernel BUG at fs/buffer.c:2886! Linux 3.5.0


Hi,

So 12 commits left, corresponding to this bisection log

git bisect start
# bad: [2d534926205db9ffce4bbbde67cb9b2cee4b835c] Merge tag
'irqdomain-for-linus' of git://git.secretlab.ca/git/linux-2.6
git bisect bad 2d534926205db9ffce4bbbde67cb9b2cee4b835c
# good: [c3b92c8787367a8bb53d57d9789b558f1295cc96] Linux 3.1
git bisect good c3b92c8787367a8bb53d57d9789b558f1295cc96
# good: [95211279c5ad00a317c98221d7e4365e02f20836] Merge branch 'akpm'
(Andrew's patch-bomb)
git bisect good 95211279c5ad00a317c98221d7e4365e02f20836
# good: [654443e20dfc0617231f28a07c96a979ee1a0239] Merge branch
'perf-uprobes-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 654443e20dfc0617231f28a07c96a979ee1a0239
# bad: [f0a08fcb5972167e55faa330c4a24fbaa3328b1f] Merge
git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
git bisect bad f0a08fcb5972167e55faa330c4a24fbaa3328b1f
# bad: [f5e7e844a571124ffc117d4696787d6afc4fc5ae] Merge tag
'for-linus-3.5-20120601' of git://git.infradead.org/linux-mtd
git bisect bad f5e7e844a571124ffc117d4696787d6afc4fc5ae
# good: [f465d145d76803fe6332092775d891c8c509aa44] Merge tag
'cleanup-initcall' of
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
git bisect good f465d145d76803fe6332092775d891c8c509aa44
# good: [a70f35af4e49f87ba4b6c4b30220fbb66cd74af6] Merge branch
'for-3.5/drivers' of git://git.kernel.dk/linux-block
git bisect good a70f35af4e49f87ba4b6c4b30220fbb66cd74af6
# good: [a00b6151a2ae4c52576c35d3998e144a993d50b8] Merge branch
'for-3.5-take-2' of git://linux-nfs.org/~bfields/linux
git bisect good a00b6151a2ae4c52576c35d3998e144a993d50b8
# bad: [1193755ac6328ad240ba987e6ec41d5e8baf0680] Merge branch
'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
git bisect bad 1193755ac6328ad240ba987e6ec41d5e8baf0680
# good: [51eab603f5c86dd1eae4c525df3e7f7eeab401d6] Merge branch
'for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
git bisect good 51eab603f5c86dd1eae4c525df3e7f7eeab401d6
# bad: [eb36c5873b96e8c7376768d3906da74aae6e3839] new helper:
vm_mmap_pgoff()
git bisect bad eb36c5873b96e8c7376768d3906da74aae6e3839
# skip: [eea62f831b8030b0eeea8314eed73b6132d1de26] brlocks/lglocks: turn
into functions
git bisect skip eea62f831b8030b0eeea8314eed73b6132d1de26
# good: [52576da3545e78c534d901a39f6f2391665c641b] hpfs: bitmaps are
little-endian
git bisect good 52576da3545e78c534d901a39f6f2391665c641b
# bad: [3ed37648e1cbf1bbebc200c6ea8fd8daf8325843] fs: move
file_remove_suid() to fs/inode.c
git bisect bad 3ed37648e1cbf1bbebc200c6ea8fd8daf8325843
# bad: [962830df366b66e71849040770ae6ba55a8b4aec] brlocks/lglocks: API
cleanups
git bisect bad 962830df366b66e71849040770ae6ba55a8b4aec

the commit left are

commit 962830df366b66e71849040770ae6ba55a8b4aec
Author: Andi Kleen <ak@...ux.intel.com>
Date:   Tue May 8 13:32:02 2012 +0930

    brlocks/lglocks: API cleanups


commit eea62f831b8030b0eeea8314eed73b6132d1de26
Author: Andi Kleen <ak@...ux.intel.com>
Date:   Tue May 8 13:32:24 2012 +0930

    brlocks/lglocks: turn into functions

commit 9dd6fa03ab31bb57cee4623a689d058d222fbe68
Author: Rusty Russell <rusty@...tcorp.com.au>
Date:   Tue May 8 13:29:45 2012 +0930

    lglock: remove online variants of lock

commit ea022dfb3c2a4680483b00eb2fecc9fc4f6091d1
Author: Al Viro <viro@...iv.linux.org.uk>
Date:   Thu May 3 10:14:29 2012 -0400

    ocfs: simplify symlink handling
   

commit 408bd629badbd4353b238ab6f58001529b274d73
Author: Al Viro <viro@...iv.linux.org.uk>
Date:   Thu May 3 09:34:20 2012 -0400

    get rid of pointless allocations and copying in ecryptfs_follow_link()
   
    switch to generic_readlink(), while we are at it


commit 28fe3c1963b0bafa56ec92df1987828090151d87
Author: Al Viro <viro@...iv.linux.org.uk>
Date:   Tue Apr 17 16:41:13 2012 -0400

    hpfs: assorted endianness annotations

commit 77ee26e44c28823a29bc09091950544566ae7cea
Author: Al Viro <viro@...iv.linux.org.uk>
Date:   Tue Apr 17 16:26:46 2012 -0400

    hpfs: annotate ea

commit 46287aa652fa8ea1edac41817ddc63332495ffc3
Author: Al Viro <viro@...iv.linux.org.uk>
Date:   Tue Apr 17 16:20:49 2012 -0400

    hpfs: annotate struct hpfs_dirent

commit 6ce2bbba5266c1dd5c27dd8af1887ed8ca564919
Author: Al Viro <viro@...iv.linux.org.uk>
Date:   Tue Apr 17 16:11:25 2012 -0400

    hpfs: annotate struct anode

commit 2b9f1cc29ba0e56089fe04501ec6d3b49eee3c3e
Author: Al Viro <viro@...iv.linux.org.uk>
Date:   Tue Apr 17 16:09:25 2012 -0400

    hpfs: annotate struct fnode

commit ddc19e6e04c1131a48f5b9a25aa433bbd8430cdd
Author: Al Viro <viro@...iv.linux.org.uk>
Date:   Tue Apr 17 15:59:35 2012 -0400

    hpfs: annotate btree nodes, get rid of bitfields mess
   
commit 39413c6046de282a92739110cfafb8f1e862680d
Author: Al Viro <viro@...iv.linux.org.uk>
Date:   Tue Apr 17 15:32:22 2012 -0400

    hpfs: annotate struct dnode


After that bisection start to be quite hard : i have compile error or
unbootable kernel or unrelated OOPS


For the record the BUG that i'm chasing is this one :



[  934.933390] kernel BUG at fs/buffer.c:2882!
[  934.933401] invalid opcode: 0000 [#1] SMP
[  934.933412] CPU 0
[  934.933419] Modules linked in: drbd lru_cache
[  934.933429]
[  934.933437] Pid: 4301, comm: deliver Not tainted 3.4.0+ #16 HP
ProLiant ML150 G3/ML150 G3
[  934.933461] RIP: 0010:[<ffffffff8117a252>]  [<ffffffff8117a252>]
submit_bh+0x112/0x120
[  934.933477] RSP: 0018:ffff880076c07b38  EFLAGS: 00010246
[  934.933489] RAX: 4000000000800004 RBX: ffffea0001d82dc0 RCX:
00000003ffffffff
[  934.933504] RDX: 0000000000000001 RSI: ffffea0001d82dc0 RDI:
0000000000000000
[  934.933519] RBP: 0000000000000000 R08: 0000000000000000 R09:
ffffffff8133b0a0
[  934.933534] R10: dead000000200200 R11: dead000000100100 R12:
0000000004cc4789
[  934.933549] R13: 00000003ffffffff R14: 0000000000000000 R15:
0000000000000000
[  934.933564] FS:  00007fdb397ff700(0000) GS:ffff88007fc00000(0000)
knlGS:0000000000000000
[  934.933581] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  934.933593] CR2: 00007fe29e575024 CR3: 00000000766b3000 CR4:
00000000000007f0
[  934.933608] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[  934.933677] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[  934.933750] Process deliver (pid: 4301, threadinfo ffff880076c06000,
task ffff88007d10a4e0)
[  934.935047] Stack:
[  934.935113]  ffffea0001d82dc0 0000000000000001 0000000004cc4789
ffffffff8131bad6
[  934.935236]  000000001725db78 ffffffff81ca03c8 ffff88007d10ab48
ffff880076c07c10
[  934.935355]  0000000076c06010 0000000100000000 ffff8800172269b0
ffff88000d2a4000
[  934.935471] Call Trace:
[  934.935534]  [<ffffffff8131bad6>] ? ocfs2_read_blocks+0x176/0x6c0
[  934.935600]  [<ffffffff8133b0a0>] ? ocfs2_find_actor+0x120/0x120
[  934.935665]  [<ffffffff8133aac7>] ? ocfs2_read_inode_block_full+0x37/0x60
[  934.935734]  [<ffffffff8138ab1f>] ?
ocfs2_fast_symlink_readpage+0x2f/0x160
[  934.935803]  [<ffffffff8110fff5>] ? do_read_cache_page+0x85/0x180
[  934.935868]  [<ffffffff8138aaf0>] ? ocfs2_fill_super+0x2500/0x2500
[  934.935934]  [<ffffffff81110149>] ? read_cache_page+0x9/0x20
[  934.935999]  [<ffffffff811565e5>] ? page_getlink+0x25/0x80
[  934.936062]  [<ffffffff8115665b>] ? page_follow_link_light+0x1b/0x30
[  934.936128]  [<ffffffff8115ab27>] ? path_lookupat+0x327/0x6c0
[  934.936193]  [<ffffffff8115aeec>] ? do_path_lookup+0x2c/0xc0
[  934.936258]  [<ffffffff8133b501>] ? ocfs2_inode_revalidate+0x71/0x160
[  934.936325]  [<ffffffff8113210a>] ? handle_pte_fault+0x8a/0x920
[  934.936390]  [<ffffffff8115bd8c>] ? user_path_at_empty+0x5c/0xb0
[  934.936457]  [<ffffffff81066fca>] ? do_page_fault+0x1aa/0x3c0
[  934.936523]  [<ffffffff81150ded>] ? cp_new_stat+0x10d/0x120
[  934.936588]  [<ffffffff81150ee1>] ? vfs_fstatat+0x41/0x80
[  934.936653]  [<ffffffff8115101f>] ? sys_newstat+0x1f/0x50
[  934.936720]  [<ffffffff817cb8a2>] ? system_call_fastpath+0x16/0x1b


Does it gives some better information ? Do you haev some ideas of thinks
that could be tested ?


Vincent




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