Date: Mon, 15 Jul 2013 00:22:28 -0700 From: Yuri <yuri@rawbw.com> To: freebsd-hackers@FreeBSD.org Subject: Kernel crashes after sleep: how to debug? Message-ID: <51E3A334.8020203@rawbw.com>
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After sleep/wakeup cycle my 9.1-STABLE r253105 amd64 system has a
tendency to sometimes randomly crash after a while. It doesn't happen
every time.
See kgdb log below. I am not sure there is enough information to lead to
the cause of the issue.
It looks like it crashes near the line:
#7 0xffffffff8091a181 in _mtx_trylock (m=0x100000000, opts=0,
file=<value optimized out>, line=0) at /usr/src/sys/kern/kern_mutex.c:295
295 if (SCHEDULER_STOPPED())
Current language: auto; currently c
(kgdb) l
290 uint64_t waittime = 0;
291 int contested = 0;
292 #endif
293 int rval;
294
295 if (SCHEDULER_STOPPED())
296 return (1);
297
298 KASSERT(m->mtx_lock != MTX_DESTROYED,
299 ("mtx_trylock() of destroyed mutex @ %s:%d", file,
line));
Current thread was:
* 67 Thread 100064 (PID=5: pagedaemon) doadump (textdump=<value
optimized out>) at pcpu.h:234
How to find the cause of the crash?
Yuri
--- kgdb log ---
# kgdb /boot/kernel/kernel vmcore.0
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
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Type "show copying" to see the conditions.
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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 = 0; apic id = 00
fault virtual address = 0x100000018
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff8091a181
stack pointer = 0x28:0xffffff80d51c6ab0
frame pointer = 0x28:0xffffff80d51c6ad0
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 = 5 (pagedaemon)
trap number = 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
#0 0xffffffff80968416 at kdb_backtrace+0x66
#1 0xffffffff8092e43e at panic+0x1ce
#2 0xffffffff80d12940 at trap_fatal+0x290
#3 0xffffffff80d12ca1 at trap_pfault+0x211
#4 0xffffffff80d13254 at trap+0x344
#5 0xffffffff80cfc583 at calltrap+0x8
#6 0xffffffff80baea78 at vm_pageout+0x998
#7 0xffffffff808fc10f at fork_exit+0x11f
#8 0xffffffff80cfcaae at fork_trampoline+0xe
Uptime: 2h21m27s
Dumping 407 out of 2919 MB:..4%..12%..24%..32%..44%..52%..63%..71%..83%..91%
Reading symbols from /boot/modules/cuse4bsd.ko...done.
Loaded symbols for /boot/modules/cuse4bsd.ko
Reading symbols from /boot/kernel/linux.ko...Reading symbols from
/boot/kernel/linux.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /usr/local/libexec/linux_adobe/linux_adobe.ko...done.
Loaded symbols for /usr/local/libexec/linux_adobe/linux_adobe.ko
Reading symbols from /boot/kernel/radeon.ko...Reading symbols from
/boot/kernel/radeon.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/radeon.ko
Reading symbols from /boot/kernel/drm.ko...Reading symbols from
/boot/kernel/drm.ko.symbols...done.
done.
Loaded symbols for /boot/kernel/drm.ko
#0 doadump (textdump=<value optimized out>) at pcpu.h:234
234 pcpu.h: No such file or directory.
in pcpu.h
(kgdb) bt
#0 doadump (textdump=<value optimized out>) at pcpu.h:234
#1 0xffffffff8092df16 in kern_reboot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:449
#2 0xffffffff8092e417 in panic (fmt=0x1 <Address 0x1 out of bounds>) at
/usr/src/sys/kern/kern_shutdown.c:637
#3 0xffffffff80d12940 in trap_fatal (frame=0xc, eva=<value optimized
out>) at /usr/src/sys/amd64/amd64/trap.c:879
#4 0xffffffff80d12ca1 in trap_pfault (frame=0xffffff80d51c6a00,
usermode=0) at /usr/src/sys/amd64/amd64/trap.c:795
#5 0xffffffff80d13254 in trap (frame=0xffffff80d51c6a00) at
/usr/src/sys/amd64/amd64/trap.c:463
#6 0xffffffff80cfc583 in calltrap () at
/usr/src/sys/amd64/amd64/exception.S:232
#7 0xffffffff8091a181 in _mtx_trylock (m=0x100000000, opts=0,
file=<value optimized out>, line=0) at /usr/src/sys/kern/kern_mutex.c:295
#8 0xffffffff80baea78 in vm_pageout () at /usr/src/sys/vm/vm_pageout.c:829
#9 0xffffffff808fc10f in fork_exit (callout=0xffffffff80bae0e0
<vm_pageout>, arg=0x0, frame=0xffffff80d51c6c40)
at /usr/src/sys/kern/kern_fork.c:988
#10 0xffffffff80cfcaae in fork_trampoline () at
/usr/src/sys/amd64/amd64/exception.S:606
#11 0x0000000000000000 in ?? ()
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