Date: Fri, 15 Sep 2006 12:13:48 +0200 From: Anders Nordby <anders@FreeBSD.org> To: Pawel Worach <pawel.worach@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: panic: page fault in kern_kevent Message-ID: <20060915101348.GA88551@totem.fix.no> In-Reply-To: <44BABBAD.5060606@gmail.com> References: <44BABBAD.5060606@gmail.com>
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Hi, Just wanted to say that I have the same problem, kernel crashing because of kernel queues usage in Squid 2.6. I've reported some more information on: http://www.freebsd.org/cgi/query-pr.cgi?pr=103127 On Mon, Jul 17, 2006 at 12:20:29AM +0200, Pawel Worach wrote: > Under moderate kqueue load I caught the following: > > Fatal trap 12: page fault while in kernel mode > fault virtual address = 0x0 > fault code = supervisor read, page not present > instruction pointer = 0x20:0x0 > stack pointer = 0x28:0xe745db78 > frame pointer = 0x28:0xe745dbb8 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, def32 1, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = 582 (squid) > trap number = 12 > panic: page fault > KDB: stack backtrace: > kdb_backtrace(c065b33b,c06a4780,c065344e,e745da80,100) at kdb_backtrace+0x2e > panic(c065344e,c066df69,c49c0dd0,1,1) at panic+0xb7 > trap_fatal(e745db38,0,1,0,c05239e2) at trap_fatal+0x33e > trap_pfault(e745db38,0,0,e745db38,0) at trap_pfault+0x242 > trap(c05e0008,c7310028,28,0,4) at trap+0x350 > calltrap() at calltrap+0x5 > --- trap 0xc, eip = 0, esp = 0xe745db78, ebp = 0xe745dbb8 --- > MAXCPU(c4b20500,e745dbe8,c65c3300,1,c0c38000) at 0 > kern_kevent(c65c3300,3,5,80,e745dcbc) at kern_kevent+0xf8 > kevent(c65c3300,e745dd04,18,16,c65c3300) at kevent+0x7a > syscall(821003b,3b,822003b,48106cf0,bfbfeec8) at syscall+0x380 > Xint0x80_syscall() at Xint0x80_syscall+0x1f > --- syscall (363, FreeBSD ELF32, kevent), eip = 0x4821ccfb, esp = > 0xbfbfedfc, ebp = 0xbfbfee48 --- > Uptime: 3d15h16m7s > Dumping 1023 MB (2 chunks) > chunk 0: 1MB (159 pages) ... ok > chunk 1: 1023MB (261884 pages) 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 > > (kgdb) bt > #0 doadump () at pcpu.h:165 > #1 0xc04c261c in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409 > #2 0xc04c299d in panic (fmt=0xc065344e "%s") > at /usr/src/sys/kern/kern_shutdown.c:565 > #3 0xc0637f7e in trap_fatal (frame=0xe745db38, eva=0) > at /usr/src/sys/i386/i386/trap.c:836 > #4 0xc0637c12 in trap_pfault (frame=0xe745db38, usermode=0, eva=0) > at /usr/src/sys/i386/i386/trap.c:744 > #5 0xc0637780 in trap (frame= > {tf_fs = -1067581432, tf_es = -953090008, tf_ds = 40, tf_edi = 0, > tf_esi = 4, tf_ebp = -414852168, tf_isp = -414852252, tf_ebx = 4, tf_edx > = -953052640, tf_ecx = -1066925280, tf_eax = -1066924800, tf_trapno = > 12, tf_err = 0, tf_eip = 0, tf_cs = 32, tf_eflags = 66118, tf_esp = > -1068903001, tf_ss = -953052640}) > at /usr/src/sys/i386/i386/trap.c:434 > #6 0xc062498a in calltrap () at /usr/src/sys/i386/i386/exception.s:139 > #7 0x00000000 in ?? () > Previous frame inner to this frame (corrupt stack?) > (kgdb) l *kern_kevent+0xf8 > 0xc049c6d8 is in kern_kevent (/usr/src/sys/kern/kern_event.c:637). > 632 goto done; > 633 changes = keva; > 634 for (i = 0; i < n; i++) { > 635 kevp = &changes[i]; > 636 kevp->flags &= ~EV_SYSFLAGS; > 637 error = kqueue_register(kq, kevp, td, 1); > 638 if (error) { > 639 if (nevents != 0) { > 640 kevp->flags = EV_ERROR; > 641 kevp->data = error; > > System is i386 UP running FreeBSD 6.1-STABLE #0: Sun Jul 9 01:11:16 > CEST 2006 > > -- > Pawel > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" -- Anders.
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