Re: [GIT PULL] Core block IO bits for 2.6.39 - early Oops

[Markus Trippelsdorf <markus@trippelsdorf.de>]

On 2011.03.24 at 22:01 +0100, Jens Axboe wrote:
> On 2011-03-24 21:06, Markus Trippelsdorf wrote:
> > On 2011.03.24 at 20:57 +0100, Jens Axboe wrote:
> >>
> >> OK, still a data point. What was the last -git kernel you used?
> > 
> > This one was the last and gave me no problems:
> > 
> > commit b81a618dcd3ea99de292dbe624f41ca68f464376
> > Merge: 2f284c8 a9712bc
> > Author: Linus Torvalds <torvalds@linux-foundation.org>
> > Date:   Wed Mar 23 20:51:42 2011 -0700
> > 
> >     Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
> 
> Puzzling... Poking at straws here so far. Does this make any difference
> whatsoever?

I will test your patch later.

Git-bisect gave me this result thus far:

9026e521c0da0731eb31f9f9022dd00cc3cd8885 is bad
82f04ab47e1d94d78503591a7460b2cad9601ede is good

When I continue the bisection with 4345caba340f051e10847924fc078ae18ed6695c
the system will start normally, but it then silently corrupts my xfs
partitions. And on next (re)boot I get this (only fixable with
xfs_repair):

BUG: unable to handle kernel NULL pointer dereference at 00000000000000f8
IP: [<ffffffff8123cb97>] xfs_cmn_err+0x27/0xc0
PGD 21c54c067 PUD 21c6bb067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:11.0/host1/target1:0:0/1:0:0:0/block/sdb/sdb2/alignment_offset
CPU 3 
Pid: 1294, comm: rm Not tainted 2.6.38-rc6-00279-g4345cab #25 System manufacturer System Product Name/M4A78T-E
RIP: 0010:[<ffffffff8123cb97>]  [<ffffffff8123cb97>] xfs_cmn_err+0x27/0xc0
RSP: 0018:ffff88021c7b9ab8  EFLAGS: 00010246
RAX: ffff88021c7b9b38 RBX: ffff88021dd14118 RCX: ffffffff8167a348
RDX: 0000000000000000 RSI: ffffffff816501f0 RDI: 0000000000000008
RBP: ffff88021c7b9b28 R08: ffffffff81650119 R09: 000000000000058e
R10: 0000000000000001 R11: 0000000000012de8 R12: ffff88021dcc3340
R13: 0000000000000075 R14: ffff88021e126c80 R15: 00000000000b0208
FS:  00007fef28aec700(0000) GS:ffff8800dfd80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00000000000000f8 CR3: 000000021c5ae000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process rm (pid: 1294, threadinfo ffff88021c7b8000, task ffff88021c566710)
Stack:
 ffffffff811f2362 ffff88021dcc3340 ffff88021c7b9b08 ffffffff811f7dab
 000000000000ea60 ffff88021e173e00 ffff88021c7b9bb4 ffff88021c7b9bb0
 ffff88021c7b9bac ffff88021e126c80 ffff88021c7b9b48 ffffffff811dadfe
Call Trace:
 [<ffffffff811f2362>] ? xfs_btree_rec_addr+0x12/0x20
 [<ffffffff811f7dab>] ? xfs_btree_get_rec+0x5b/0x90
 [<ffffffff811dadfe>] ? xfs_alloc_get_rec+0x2e/0x70
 [<ffffffff812072f0>] xfs_error_report+0x40/0x50
 [<ffffffff811de274>] ? xfs_free_extent+0x94/0xc0
 [<ffffffff811dc120>] xfs_free_ag_extent+0x4e0/0x7d0
 [<ffffffff811de274>] xfs_free_extent+0x94/0xc0
 [<ffffffff8122d4d5>] ? kmem_zone_alloc+0x85/0xd0
 [<ffffffff811ee3e4>] xfs_bmap_finish+0x164/0x1b0
 [<ffffffff8120e6b0>] xfs_itruncate_finish+0x150/0x3f0
 [<ffffffff8122d4d5>] ? kmem_zone_alloc+0x85/0xd0
 [<ffffffff8122ae46>] xfs_inactive+0x2d6/0x440
 [<ffffffff812391ba>] xfs_fs_evict_inode+0xaa/0x130
 [<ffffffff81133d14>] evict+0x24/0xc0
 [<ffffffff81134a1b>] iput+0x1ab/0x280
 [<ffffffff8112a0c6>] do_unlinkat+0x116/0x1c0
 [<ffffffff811208fa>] ? sys_newfstatat+0x2a/0x40
 [<ffffffff8112a192>] sys_unlinkat+0x22/0x40
 [<ffffffff8103ddeb>] system_call_fastpath+0x16/0x1b
Code: 00 00 00 00 55 48 89 e5 48 83 ec 70 66 66 66 66 90 8b 05 59 d6 4b 00 4c 89 45 f0 4c 89 4d f8 85 c0 74 04 85 c7 75 3e 48 8d 45 10 <48> 8b b2 f8 
00 00 00 48 8d 55 c0 48 c7 c7 ce 11 65 81 c7 45 a8 
RIP  [<ffffffff8123cb97>] xfs_cmn_err+0x27/0xc0
 RSP <ffff88021c7b9ab8>
CR2: 00000000000000f8
---[ end trace 43fa8028bd7b575e ]--

-- 
Markus