atom feed60 messages in org.freebsd.freebsd-currentRe: zfs: Fatal trap 12: page fault wh...
FromSent OnAttachments
Juergen UngerJul 27, 2009 12:24 am 
O. HartmannJul 27, 2009 12:58 pm 
Juergen UngerJul 27, 2009 2:33 pm 
Andriy GaponJul 28, 2009 2:50 am 
Pawel Jakub DawidekJul 29, 2009 1:47 am 
Thomas BackmanJul 29, 2009 3:31 am 
Andriy GaponJul 29, 2009 4:21 am 
Andriy GaponJul 29, 2009 4:41 am 
Thomas BackmanJul 29, 2009 5:45 am 
Andriy GaponJul 29, 2009 6:03 am 
Thomas BackmanJul 29, 2009 6:23 am 
Andriy GaponJul 29, 2009 6:45 am 
Thomas BackmanJul 29, 2009 6:52 am 
Andriy GaponJul 29, 2009 6:55 am 
Thomas BackmanJul 29, 2009 7:10 am 
Andriy GaponJul 29, 2009 7:35 am 
Andriy GaponJul 29, 2009 9:01 am 
Thomas BackmanJul 29, 2009 9:10 am 
Thomas BackmanJul 29, 2009 10:13 am 
Andriy GaponJul 29, 2009 10:17 am 
Thomas BackmanJul 29, 2009 11:03 am 
Thomas BackmanJul 29, 2009 1:14 pm 
Pawel Jakub DawidekJul 29, 2009 2:17 pm 
Thomas BackmanJul 30, 2009 12:04 am 
Andriy GaponJul 30, 2009 5:11 am 
Thomas BackmanJul 30, 2009 5:51 am 
Andriy GaponJul 30, 2009 6:13 am 
Thomas BackmanJul 30, 2009 6:31 am 
Andriy GaponJul 30, 2009 6:34 am 
Andriy GaponJul 30, 2009 7:24 am 
Thomas BackmanJul 30, 2009 7:39 am 
Andriy GaponJul 30, 2009 7:45 am 
Andriy GaponJul 30, 2009 7:48 am 
Thomas BackmanJul 30, 2009 8:25 am 
Andriy GaponJul 30, 2009 8:39 am 
Thomas BackmanJul 30, 2009 9:41 am 
Thomas BackmanJul 30, 2009 11:29 am 
Andriy GaponJul 30, 2009 11:41 am 
Thomas BackmanJul 31, 2009 2:04 am 
James R. Van ArtsdalenJul 31, 2009 4:44 am 
Thomas BackmanJul 31, 2009 5:26 am 
Thomas BackmanJul 31, 2009 10:09 am 
Tim KientzleAug 1, 2009 10:11 am 
Juergen UngerAug 2, 2009 2:26 am 
Pawel Jakub DawidekAug 2, 2009 2:29 am 
Juergen UngerAug 3, 2009 1:32 pm 
Pawel Jakub DawidekAug 4, 2009 12:33 am 
Juergen UngerAug 4, 2009 12:53 am 
Pawel Jakub DawidekAug 4, 2009 2:49 am 
Juergen UngerAug 4, 2009 2:56 am 
Pawel Jakub DawidekAug 4, 2009 12:50 pm 
Thomas BackmanAug 4, 2009 1:10 pm 
Pawel Jakub DawidekAug 4, 2009 1:25 pm 
Pawel Jakub DawidekAug 4, 2009 11:49 pm 
Thomas BackmanAug 5, 2009 12:08 am 
Thomas BackmanAug 5, 2009 12:20 am 
Pawel Jakub DawidekAug 5, 2009 2:37 am 
Thomas BackmanAug 5, 2009 3:36 am 
Thomas BackmanAug 5, 2009 5:06 am 
Pawel Jakub DawidekAug 6, 2009 10:44 pm 
Subject:Re: zfs: Fatal trap 12: page fault while in kernel mode
From:Pawel Jakub Dawidek (pj@FreeBSD.org)
Date:Jul 29, 2009 1:47:00 am
List:org.freebsd.freebsd-current

On Tue, Jul 28, 2009 at 12:50:26PM +0300, Andriy Gapon wrote:

on 27/07/2009 22:58 O. Hartmann said the following:

Juergen Unger wrote:

[snip]

_sx_xlock(3c,0,874aa28d,70f,8ae9a9f8,...) at _sx_xlock+0x43 dmu_buf_update_user(0,8ae9a9f8,0,0,0,...) at dmu_buf_update_user+0x35 zfs_znode_dmu_fini(8ae9a9f8,874b312d,1114,110b,879ab000,...) at zfs_znode_dmu_f3 zfs_freebsd_reclaim(fcd29c3c,1,0,8ec63754,fcd29c60,...) at zfs_freebsd_reclaim+0 VOP_RECLAIM_APV(874b65a0,fcd29c3c,0,0,8ec637c8,...) at VOP_RECLAIM_APV+0xa5 vgonel(8ec637c8,0,80c77037,386,0,...) at vgonel+0x1a4 vnlru_free(80f2a0f0,0,80c77037,300,3e8,...) at vnlru_free+0x2d5 vnlru_proc(0,fcd29d38,80c652bc,33e,871932a8,...) at vnlru_proc+0x80 fork_exit(8090d960,0,fcd29d38) at fork_exit+0xb8 fork_trampoline() at fork_trampoline+0x8

[snip]

I see a similar problem on two SMP boxes (is your SMP?), but in my case, it seems not to be ZFS related although I also use ZFS as /home filesystem

In this case this does seem to be caused by ZFS. From the backtrace we see that _sx_xlock() is called on bogus struct sx pointer (0x3c) and this is caused by dmu_buf_update_user() called with NULL first
argument (dmu_buf_t). Which means that znode_t z_dbuf was NULL - this could have been caught by ASSERT in zfs_znode_dmu_fini if it were enabled.

If you have the crash dump, then it would be interesting to examine znode_t structure ('zp' argument) in zfs_znode_dmu_fini.

P.S. I see that zfs_inactive checks for z_dbuf being NULL and there is the following comment: /* * The fs has been unmounted, or we did a * suspend/resume and this file no longer exists. */ Maybe zfs_freebsd_reclaim should do the same?

Yes, you might be right.

Could you guys, who can reproduce it, try this patch:

http://people.freebsd.org/~pjd/patches/zfs_vnops.c.2.patch

-- Pawel Jakub Dawidek http://www.wheel.pl pj@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am!