Date: Fri, 24 Jul 2009 17:16:34 +0400 From: pluknet <pluknet@gmail.com> To: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: [geom] page fault in g_mbr_config() Message-ID: <a31046fc0907240616n636dbbeam7ec2a3230c9562e4@mail.gmail.com> In-Reply-To: <a31046fc0907240611g7e5c086ft9a7f5d0e5e4dc7e0@mail.gmail.com> References: <a31046fc0907240611g7e5c086ft9a7f5d0e5e4dc7e0@mail.gmail.com>
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2009/7/24 pluknet <pluknet@gmail.com>: > Hi. > > I got a panic while performing a repetitive =A0'fdisk -BI aacd0', > where aacd0 is a disk on aac0: <IBM ServeRAID-8k>. > This means that the command was issued after filesystems > were already created on aacd (after the first fdisk -BI aacd0 > iteration), and are in umount'ed state. > > This is on 7.2-R, amd64. Config is a GENERIC plus ddb, carp, ipfw, quota. > > Fatal trap 12: page fault while in kernel mode > cpuid =3D 5; apic id =3D 05 > fault virtual address =A0 =3D 0x20 > fault code =A0 =A0 =A0 =A0 =A0 =A0 =A0=3D supervisor read data, page not = present > instruction pointer =A0 =A0 =3D 0x8:0xffffffff804cc554 > stack pointer =A0 =A0 =A0 =A0 =A0 =3D 0x10:0xfffffffe80079b80 > frame pointer =A0 =A0 =A0 =A0 =A0 =3D 0x10:0xfffffffe80079bd0 > code segment =A0 =A0 =A0 =A0 =A0 =A0=3D base 0x0, limit 0xfffff, type 0x1= b > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=3D DPL 0, pres 1, long 1,= def32 0, gran 1 > processor eflags =A0 =A0 =A0 =A0=3D interrupt enabled, resume, IOPL =3D 0 > current process =A0 =A0 =A0 =A0 =3D 2 (g_event) > [thread pid 2 tid 100013 ] > Stopped at =A0 =A0 =A0g_mbr_config+0x64: =A0 =A0 =A0movq =A0 =A00x20(%rax= ),%r15 > db> bt > Tracing pid 2 tid 100013 td 0xffffff000144da50 > g_mbr_config() at g_mbr_config+0x64 > g_run_events() at g_run_events+0x1b8 > g_event_procbody() at g_event_procbody+0x57 > fork_exit() at fork_exit+0x11f > fork_trampoline() at fork_trampoline+0xe > --- trap 0, rip =3D 0, rsp =3D 0xfffffffe80079d30, rbp =3D 0 --- And, of course... db> show proc 818 Process 818 (fdisk) at 0xffffff0004ed1000: state: NORMAL uid: 0 gids: 0, 0, 5 parent: pid 814 at 0xffffff00045c0478 ABI: FreeBSD ELF64 arguments: fdisk threads: 1 100169 D g_waitfo 0xffffff0004ec9100 fdisk db> bt 818 Tracing pid 818 tid 100169 td 0xffffff0004fbf6e0 sched_switch() at sched_switch+0x1fe mi_switch() at mi_switch+0x18e sleepq_timedwait() at sleepq_timedwait+0x31 _sleep() at _sleep+0x354 g_waitfor_event() at g_waitfor_event+0x9a g_ctl_ioctl() at g_ctl_ioctl+0x2df giant_ioctl() at giant_ioctl+0x7d devfs_ioctl_f() at devfs_ioctl_f+0x77 kern_ioctl() at kern_ioctl+0xa2 ioctl() at ioctl+0xf9 syscall() at syscall+0x256 Xfast_syscall() at Xfast_syscall+0xab --- syscall (54, FreeBSD ELF64, ioctl), rip =3D 0x8008200ec, rsp =3D 0x7fffffffe1d8, rbp =3D 0x4 --- --=20 wbr, pluknet
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