2009/6/6 <ge...@dts.su>
> Hello.
>
> What options I must add to kernel? Can You tell me what I must do when
> system crash next time?
>
> > On 6/6/09, ge...@dts.su <ge...@dts.su> wrote:
> >> Hello, Freebsd-questions.
> >>
> >> After one of new crash I have this:
> >>
> >> GNU gdb 6.1.1 [FreeBSD]
> >> Copyright 2004 Free Software Foundation, Inc.
> >> GDB is free software, covered by the GNU General Public License, and you
> are
> >> welcome to change it and/or distribute copies of it under certain
> >> conditions.
> >> Type "show copying" to see the conditions.
> >> There is absolutely no warranty for GDB. Type "show warranty" for
> details.
> >> This GDB was configured as "amd64-marcel-freebsd"...
> >>
> >> Unread portion of the kernel message buffer:
> >>
> >>
> >> Fatal trap 12: page fault while in kernel mode
> >> cpuid = 2; apic id = 02
> >> fault virtual address = 0x0
> >> fault code = supervisor read data, page not present
> >> instruction pointer = 0x8:0xffffffff804c4eb8
> >> stack pointer = 0x10:0xffffff807a0478f0
> >> frame pointer = 0x10:0xffffff807a047930
> >> 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 = 32668 (perl5.10.0)
> >> Physical memory: 4082 MB
> >> Dumping 1647 MB: 1632 1616 1600 1584 1568 1552 1536 1520 1504 1488 1472
> 1456
> >> 1440 1424 1408 1392 1376 1360 1344 1328 1312 1296 1280 1264 1248 1232
> 1216
> >> 1200 1184 1168 1152 1136 1120 1104 1088 1072 1056 1040 1024 1008 992 976
> 960
> >> 944 928 912 896 880 864 848 832 816 800 784 768 752 736 720 704 688 672
> 656
> >> 640 624 608 592 576 560 544 528 512 496 480 464 448 432 416 400 384 368
> 352
> >> 336 320 304 288 272 256 240 224 208 192 176 160 144 128 112 96 80 64 48
> 32
> >> 16
> >>
> >> Reading symbols from /boot/kernel/accf_http.ko...Reading symbols from
> >> /boot/kernel/accf_http.ko.symbols...done.
> >> done.
> >> Loaded symbols for /boot/kernel/accf_http.ko
> >> #0 doadump () at pcpu.h:195
> >> 195 __asm __volatile("movq %%gs:0,%0" : "=r" (td));
> >> (kgdb) list *0xffffffff804c4eb8
> >> 0xffffffff804c4eb8 is in pfs_ioctl
> >> (/usr/src/sys/fs/pseudofs/pseudofs_vnops.c:265).
> >> 260 static int
> >> 261 pfs_ioctl(struct vop_ioctl_args *va)
> >> 262 {
> >> 263 struct vnode *vn = va->a_vp;
> >> 264 struct pfs_vdata *pvd = vn->v_data;
> >> 265 struct pfs_node *pn = pvd->pvd_pn;
> >> 266 struct proc *proc;
> >> 267 int error;
> >> 268
> >> 269 PFS_TRACE(("%s: %lx", pn->pn_name, va->a_command));
> >> (kgdb) backtrace
> >> #0 doadump () at pcpu.h:195
> >> #1 0xffffffff801c8dac in db_fncall (dummy1=Variable "dummy1" is not
> >> available.
> >> ) at /usr/src/sys/ddb/db_command.c:516
> >> #2 0xffffffff801c92df in db_command (last_cmdp=0xffffffff80b30c88,
> >> cmd_table=0x0, dopager=1) at /usr/src/sys/ddb/db_command.c:413
> >> #3 0xffffffff801c94f0 in db_command_loop () at
> >> /usr/src/sys/ddb/db_command.c:466
> >> #4 0xffffffff801cb0d9 in db_trap (type=Variable "type" is not
> available.
> >> ) at /usr/src/sys/ddb/db_main.c:228
> >> #5 0xffffffff80554e55 in kdb_trap (type=12, code=0,
> tf=0xffffff807a047840)
> >> at /usr/src/sys/kern/subr_kdb.c:524
> >> #6 0xffffffff807fae80 in trap_fatal (frame=0xffffff807a047840,
> eva=Variable
> >> "eva" is not available.
> >> ) at /usr/src/sys/amd64/amd64/trap.c:752
> >> #7 0xffffffff807fb254 in trap_pfault (frame=0xffffff807a047840,
> usermode=0)
> >> at /usr/src/sys/amd64/amd64/trap.c:673
> >> #8 0xffffffff807fbc02 in trap (frame=0xffffff807a047840) at
> >> /usr/src/sys/amd64/amd64/trap.c:444
> >> #9 0xffffffff807df35e in calltrap () at
> >> /usr/src/sys/amd64/amd64/exception.S:209
> >> #10 0xffffffff804c4eb8 in pfs_ioctl (va=0xffffff807a047a10) at
> >> /usr/src/sys/fs/pseudofs/pseudofs_vnops.c:264
> >> #11 0xffffffff805bb1d3 in vn_ioctl (fp=Variable "fp" is not available.
> >> ) at vnode_if.h:437
> >> #12 0xffffffff80562d02 in kern_ioctl (td=0xffffff0006682000, fd=3,
> >> com=1076655123, data=0xffffff00ad2b7d40 "") at file.h:269
> >> #13 0xffffffff80563029 in ioctl (td=0xffffff0006682000,
> >> uap=0xffffff807a047bf0) at /usr/src/sys/kern/sys_generic.c:571
> >> #14 0xffffffff807fb4d6 in syscall (frame=0xffffff807a047c80) at
> >> /usr/src/sys/amd64/amd64/trap.c:900
> >> #15 0xffffffff807df56b in Xfast_syscall () at
> >> /usr/src/sys/amd64/amd64/exception.S:330
> >> #16 0x0000000800c9c0ec in ?? ()
> >> Previous frame inner to this frame (corrupt stack?)
> >> (kgdb)
> >>
> >>
> >> Can You help me? What can I do? Server crash periodicaly...
>
> > Add more debug options to kernel, because dump is not useful
> > with corrupted stack.
>
> >>> For this question, you must debug the kernel by Serial.
> >>> when fatal, you use find the error by command "bt".
> >>
> >>> ------------------
> >>> Dean
> >>> 2009-06-02
> >>
> >>> -------------------------------------------------------------
> >>> 发件人：georg
> >>> 发送日期：2009-06-02 14:51:45
> >>> 收件人：freebsd-questions
> >>> 抄送：
> >>> 主题：fatal trap 12
> >>
> >>> Hello, Freebsd-questions.
> >>
> >>> I use FreeBSD 7.2-STABLE amd64. About month ago system was crashed
> >>> with "Fatal trap 12"...
> >>> I bay new hardware and install new FreeBSD 7.2-STABLE amd64. cPanel
> >>> and ASSP (anti spam proxy). And one a day or two days have this:
> >>
> >>> Fatal trap 12: page fault while in kernel mode
> >>> cpuid: = 0; apic id = 00
> >>> fault virtual address = 0x8000000000
> >>> fault code = supervisor write data, page not present
> >>> instruction pointer = 0x8:0xffffffff8018b839
> >>> stack pointer = 0x10:0xffffff807a25d190
> >>> frame pointer = 0x10:0xea5f
> >>> 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 = 59397 (perl5.10.0)
> >>> trap number = 12
> >>
> >>> And alway, after crash, I see "current process = perl5.10.0"...
> >>
> >>> Can You help me?
> >>
>
> --
> Regards, mailto:ge...@dts.su
> Yura
>
>
>
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>
Hello georg,
Here is the glossary of debugging kernel options:
http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-options.html
.
v
--
network warrior since 2005
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