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From: Rasmus Skaarup <freebsd@gal.dk>
Subject: Re: kern/176636: Periodical crashes with 9.1-R
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The following reply was made to PR kern/176636; it has been noted by GNATS.

From: Rasmus Skaarup <freebsd@gal.dk>
To: Andriy Gapon <avg@FreeBSD.org>
Cc: bug-followup@FreeBSD.org
Subject: Re: kern/176636: Periodical crashes with 9.1-R
Date: Thu, 7 Mar 2013 06:00:46 +0100

 This is the only kind of panic I get - after your patch:
 
 Fatal trap 12: page fault while in kernel mode
 cpuid =3D 1; apic id =3D 01
 fault virtual address   =3D 0x60
 fault code              =3D supervisor read data, page not present
 instruction pointer     =3D 0x20:0xffffffff8162e4f0
 stack pointer           =3D 0x28:0xffffff81624726e0
 frame pointer           =3D 0x28:0xffffff81624727d0
 code segment            =3D base 0x0, limit 0xfffff, type 0x1b
                         =3D DPL 0, pres 1, long 1, def32 0, gran 1
 processor eflags        =3D interrupt enabled, resume, IOPL =3D 0
 current process         =3D 26068 (zpool)
 trap number             =3D 12
 panic: page fault
 cpuid =3D 1
 KDB: stack backtrace:
 #0 0xffffffff809208a6 at kdb_backtrace+0x66
 #1 0xffffffff808ea8be at panic+0x1ce
 #2 0xffffffff80bd8240 at trap_fatal+0x290
 #3 0xffffffff80bd857d at trap_pfault+0x1ed
 #4 0xffffffff80bd8b9e at trap+0x3ce
 #5 0xffffffff80bc315f at calltrap+0x8
 #6 0xffffffff81673975 at sa_handle_get_from_db+0x95
 #7 0xffffffff81673a38 at sa_handle_get+0x48
 #8 0xffffffff8169f516 at zfs_grab_sa_handle+0x96
 #9 0xffffffff8169faca at zfs_obj_to_path+0x6a
 #10 0xffffffff816b8c75 at zfs_ioc_obj_to_path+0x75
 #11 0xffffffff816bad46 at zfsdev_ioctl+0xe6
 #12 0xffffffff807db28b at devfs_ioctl_f+0x7b
 #13 0xffffffff80932325 at kern_ioctl+0x115
 #14 0xffffffff8093255d at sys_ioctl+0xfd
 #15 0xffffffff80bd7ae6 at amd64_syscall+0x546
 #16 0xffffffff80bc3447 at Xfast_syscall+0xf7
 
 Br
 Rasmus
 
 On 06/03/2013, at 16.22, Rasmus Skaarup <freebsd@gal.dk> wrote:
 
 >=20
 > Tonight I will migrate all data to a UFS drive and let it run for a =
 few days. If it works, I will create a new ZFS pool and move data back =
 and see what happens.
 >=20
 > Is there any information you need before I proceed?
 >=20
 > Br
 > Rasmus Skaarup