Date: Wed, 25 Nov 2009 00:53:26 +0300 From: pluknet <pluknet@gmail.com> To: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: [geom] page fault in g_mbr_config() Message-ID: <a31046fc0911241353o49a356aahe60c7af1373994e4@mail.gmail.com> In-Reply-To: <a31046fc0907240616n636dbbeam7ec2a3230c9562e4@mail.gmail.com> References: <a31046fc0907240611g7e5c086ft9a7f5d0e5e4dc7e0@mail.gmail.com> <a31046fc0907240616n636dbbeam7ec2a3230c9562e4@mail.gmail.com>
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2009/7/24 pluknet <pluknet@gmail.com>: > 2009/7/24 pluknet <pluknet@gmail.com>: >> Hi. >> >> I got a panic while performing a repetitive '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 = 5; apic id = 05 >> fault virtual address = 0x20 >> fault code = supervisor read data, page not present >> instruction pointer = 0x8:0xffffffff804cc554 >> stack pointer = 0x10:0xfffffffe80079b80 >> frame pointer = 0x10:0xfffffffe80079bd0 >> code segment = base 0x0, limit 0xfffff, type 0x1b >> = DPL 0, pres 1, long 1, def32 0, gran 1 >> processor eflags = interrupt enabled, resume, IOPL = 0 >> current process = 2 (g_event) >> [thread pid 2 tid 100013 ] >> Stopped at g_mbr_config+0x64: movq 0x20(%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 = 0, rsp = 0xfffffffe80079d30, rbp = 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 = 0x8008200ec, rsp = > 0x7fffffffe1d8, rbp = 0x4 --- > This makes me tied to GEOM_* -> GEOM_PART_* scheme (which is in 8+ in DEFAULTS now). After this replacement in DEFAULTS I see no more panics in 'fdisk -BI aacd0'. -- wbr, pluknet
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