Date: Tue, 10 Dec 2013 15:15:34 +0400 From: Eugene Mitrofanov <eugene@imedia.ru> To: Peter Holm <peter@holm.cc> Cc: FreeBSD Stable Mailing List <freebsd-stable@freebsd.org> Subject: Re: 9.2-RELEASE + memcached = page fault Message-ID: <201312101515.34305@badger> In-Reply-To: <20131209180532.GA24975@x2.osted.lan> References: <201312091924.11590@badger> <20131209180532.GA24975@x2.osted.lan>
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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) > Does this look similar? > http://lists.freebsd.org/pipermail/freebsd-stable/2012-March/066995.html Hm. The problem description looks like very similar to mine. I disabled mentioned sysctl variables. Will wait. > > - Peter > > -- EVM7-RIPE
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