9.2-RELEASE + memcached = page fault
John Baldwin
jhb at freebsd.org
Fri Dec 13 20:57:50 UTC 2013
On Tuesday, December 10, 2013 6:15:34 am Eugene Mitrofanov wrote:
> Hello
>
> On Monday 09 December 2013, Peter Holm wrote:
> > On Mon, Dec 09, 2013 at 07:24:11PM +0400, Eugene Mitrofanov wrote:
> > > Hello
> > >
> > > after upgrading to 9.2-release i can see periodical page faults. advises
welcome.
> > >
> > > examples:
> > >
> > > 1.
> > >
> > > Fatal trap 12: page fault while in kernel mode
> > > cpuid = 5; apic id = 22
> > > fault virtual address = 0x18
> > > fault code = supervisor read data, page not present
> > > instruction pointer = 0x20:0xffffffff8051095c
> > > stack pointer = 0x28:0xffffff88a9d77800
> > > frame pointer = 0x28:0xffffff88a9d77810
> > > 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 = 1704 (memcached)
> > > trap number = 12
> > > panic: page fault
> > > cpuid = 5
> > > Uptime: 2d23h33m33s
> > >
> > > 2.
> > >
> > > Unread portion of the kernel message buffer:
> > > stack pointer = 0x28:0xffffff88a9b70800
> > > frame pointer = 0x28:0xffffff88a9b70810
> > > 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 = 2023 (memcached)
> > > trap number = 12
> > > panic: page fault
> > > cpuid = 4
> > > Uptime: 1d10h59m7s
> > >
> > > good luck
> >
> > It would be nice with a stack trace. Check out:
> > http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-
handbook/kerneldebug-online-ddb.html
> >
>
> Yes of course. You may find it below.
>
> 1st:
>
> #0 doadump (textdump=<value optimized out>) at pcpu.h:234
> 234 pcpu.h: No such file or directory.
> in pcpu.h
> (kgdb) #0 doadump (textdump=<value optimized out>) at pcpu.h:234
> #1 0xffffffff80523556 in kern_reboot (howto=260)
> at /usr/src/sys/kern/kern_shutdown.c:449
> #2 0xffffffff80523a3c in panic (fmt=0x1 <Address 0x1 out of bounds>)
> at /usr/src/sys/kern/kern_shutdown.c:637
> #3 0xffffffff80792b9d in trap_fatal (frame=0xfffffe003e20d000,
> eva=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:879
> #4 0xffffffff80792eb8 in trap_pfault (frame=0xffffff88a9d77750, usermode=0)
> at /usr/src/sys/amd64/amd64/trap.c:795
> #5 0xffffffff8079323c in trap (frame=0xffffff88a9d77750)
> at /usr/src/sys/amd64/amd64/trap.c:463
> #6 0xffffffff8077cb5f in calltrap ()
> at /usr/src/sys/amd64/amd64/exception.S:232
> #7 0xffffffff8051095c in _mtx_trylock (m=0x0, opts=0,
> file=<value optimized out>, line=<value optimized out>)
> at /usr/src/sys/kern/kern_mutex.c:295
> #8 0xffffffff8076cbae in vm_page_cowsetup (m=0xfffffe08529ecc08)
> at /usr/src/sys/vm/vm_page.c:2849
> #9 0xffffffff8058465c in socow_setup (m0=0xfffffe02997b6100,
> uio=0xffffff88a9d779e0) at /usr/src/sys/kern/uipc_cow.c:130
> #10 0xffffffff80592465 in sosend_copyin (uio=0xffffff88a9d779e0,
> retmp=0xffffff88a9d77960, atomic=0, space=0xffffff88a9d77970, flags=0)
> at /usr/src/sys/kern/uipc_socket.c:991
> #11 0xffffffff80592798 in sosend_generic (so=0xfffffe00575abd48,
> addr=0xfffffe013f50d950, uio=0xffffff88a9d779e0, top=0x0, control=0x0,
> flags=0, td=0xfffffe003e238920) at /usr/src/sys/kern/uipc_socket.c:1329
> #12 0xffffffff805946e3 in kern_sendit (td=0xfffffe003e238920, s=32,
> mp=0xffffff88a9d77ab0, flags=0, control=0x0, segflg=<value optimized
out>)
> at /usr/src/sys/kern/uipc_syscalls.c:811
> #13 0xffffffff8059499c in sendit (td=0xfffffe003e238920, s=32,
> mp=0xffffff88a9d77ab0, flags=0) at /usr/src/sys/kern/uipc_syscalls.c:739
> #14 0xffffffff80594a27 in sys_sendmsg (td=0xfffffe003e238920,
> uap=0xffffff88a9d77bb0) at /usr/src/sys/kern/uipc_syscalls.c:944
> #15 0xffffffff80792490 in amd64_syscall (td=0xfffffe003e238920, traced=0)
> at subr_syscall.c:135
> #16 0xffffffff8077ce47 in Xfast_syscall ()
> at /usr/src/sys/amd64/amd64/exception.S:391
> #17 0x0000000800d3fe2c in ?? ()
> Previous frame inner to this frame (corrupt stack?)
> (kgdb)
>
> 2nd:
>
> #0 doadump (textdump=<value optimized out>) at pcpu.h:234
> 234 pcpu.h: No such file or directory.
> in pcpu.h
> (kgdb) #0 doadump (textdump=<value optimized out>) at pcpu.h:234
> #1 0xffffffff80523556 in kern_reboot (howto=260)
> at /usr/src/sys/kern/kern_shutdown.c:449
> #2 0xffffffff80523a3c in panic (fmt=0x1 <Address 0x1 out of bounds>)
> at /usr/src/sys/kern/kern_shutdown.c:637
> #3 0xffffffff80792b9d in trap_fatal (frame=0xfffffe0010664950,
> eva=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:879
> #4 0xffffffff80792eb8 in trap_pfault (frame=0xffffff88a9b70750, usermode=0)
> at /usr/src/sys/amd64/amd64/trap.c:795
> #5 0xffffffff8079323c in trap (frame=0xffffff88a9b70750)
> at /usr/src/sys/amd64/amd64/trap.c:463
> #6 0xffffffff8077cb5f in calltrap ()
> at /usr/src/sys/amd64/amd64/exception.S:232
> #7 0xffffffff8051095c in _mtx_trylock (m=0x0, opts=0,
> file=<value optimized out>, line=<value optimized out>)
> at /usr/src/sys/kern/kern_mutex.c:295
> #8 0xffffffff8076cbae in vm_page_cowsetup (m=0xfffffe0850e13900)
> at /usr/src/sys/vm/vm_page.c:2849
> #9 0xffffffff8058465c in socow_setup (m0=0xfffffe00543fe300,
> uio=0xffffff88a9b709e0) at /usr/src/sys/kern/uipc_cow.c:130
> #10 0xffffffff80592465 in sosend_copyin (uio=0xffffff88a9b709e0,
> retmp=0xffffff88a9b70960, atomic=0, space=0xffffff88a9b70970, flags=0)
> at /usr/src/sys/kern/uipc_socket.c:991
> #11 0xffffffff80592798 in sosend_generic (so=0xfffffe02ad39caa0,
> addr=0xfffffe02a3fda520, uio=0xffffff88a9b709e0, top=0x0, control=0x0,
> flags=0, td=0xfffffe013301a000) at /usr/src/sys/kern/uipc_socket.c:1329
> #12 0xffffffff805946e3 in kern_sendit (td=0xfffffe013301a000, s=21,
> mp=0xffffff88a9b70ab0, flags=0, control=0x0, segflg=<value optimized
out>)
> at /usr/src/sys/kern/uipc_syscalls.c:811
> #13 0xffffffff8059499c in sendit (td=0xfffffe013301a000, s=21,
> mp=0xffffff88a9b70ab0, flags=0) at /usr/src/sys/kern/uipc_syscalls.c:739
> #14 0xffffffff80594a27 in sys_sendmsg (td=0xfffffe013301a000,
> uap=0xffffff88a9b70bb0) at /usr/src/sys/kern/uipc_syscalls.c:944
> #15 0xffffffff80792490 in amd64_syscall (td=0xfffffe013301a000, traced=0)
> at subr_syscall.c:135
> #16 0xffffffff8077ce47 in Xfast_syscall ()
> at /usr/src/sys/amd64/amd64/exception.S:391
> #17 0x0000000800d3fe2c in ?? ()
> Previous frame inner to this frame (corrupt stack?)
> (kgdb)
Do you have ZEROCOPY_SOCKETS enabled? If so, turn it off.
--
John Baldwin
More information about the freebsd-stable
mailing list