Date: Sat, 25 Nov 2006 12:37:55 +0200 From: Nikolay Pavlov <quetzal@zone3000.net> To: LI Xin <delphij@delphij.net> Cc: Robert Watson <rwatson@FreeBSD.org>, freebsd-stable@FreeBSD.org Subject: Re: deadlock in "zoneli" state on 6.2-PRERELEASE Message-ID: <20061125103755.GA78288@zone3000.net> In-Reply-To: <456662F4.6000306@delphij.net> References: <20061122195549.GA57018@zone3000.net> <338b359d969e9c68deaf49096aa91995@mail.geekcn.org> <20061123160208.GA62732@zone3000.net> <456662F4.6000306@delphij.net>
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On Friday, 24 November 2006 at 11:11:48 +0800, LI Xin wrote: > Nikolay Pavlov wrote: > > On Thursday, 23 November 2006 at 20:24:15 +0800, delphij@delphij.net wr= ote: > >> Hi, > >> > >> On Wed, 22 Nov 2006 21:55:49 +0200, Nikolay Pavlov <quetzal@zone3000.n= et> wrote: > >>> Hi. > >>> It seems i have a deadlock on 6.2-PRERELEASE. > >>> This is squid server in accelerator mode. > >>> I can easily trigger it with a high rate of requests. > >>> Squid is locked on some "zoneli" state, i am not sure what it is. > >>> Also i can't KILL proccess even with SIGKILL. > >>> In addition one of sshd proccess is locked too. > >> Would you please update to the latest RELENG_6 and apply this patch: > >> > >> http://people.freebsd.org/~delphij/misc/patch-zonelimit-workaround > >> > >> to see if things gets improved? > >> > >> Thanks in advance! > >> > >> Cheers, > >=20 > > Well. This patch works quite ambiguous for me. > > Under heavy load this box become unresponseble via network. > > System is mostly idle. Squid is locked in zoneli. Another panic. Guys do i need some additional debug options or this info is enough. I am asking because this panic is easily reproduceable for me. root@accel1:/usr/obj/usr/src/sys/ACCEL# kgdb kernel.debug /var/crash/vmcore= .4 kgdb: kvm_nlist(_stopped_cpus): kgdb: kvm_nlist(_stoppcbs): [GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so:= Undefined symbol "ps_pglobal_lookup"] 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 condition= s. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-marcel-freebsd". Unread portion of the kernel message buffer: lock order reversal: (sleepable after non-sleepable) 1st 0xca21567c so_snd (so_snd) @ /usr/src/sys/netinet/tcp_output.c:253 2nd 0xc070bd84 user map (user map) @ /usr/src/sys/vm/vm_map.c:3074 KDB: stack backtrace: kdb_backtrace(ffffffff,c071ccb0,c071c210,c06e5c4c,c0758f18,...) at kdb_back= trace+0x29 witness_checkorder(c070bd84,9,c06be56c,c02,c070d2c4,0,c06aab25,9f) at witne= ss_checkorder+0x4cd _sx_xlock(c070bd84,c06be56c,c02) at _sx_xlock+0x2c _vm_map_lock_read(c070bd40,c06be56c,c02,184637d,c92796b0,...) at _vm_map_lo= ck_read+0x37 vm_map_lookup(f48a29d0,0,1,f48a29d4,f48a29c4,f48a29c8,f48a29ab,f48a29ac) at= vm_map_lookup+0x28 vm_fault(c070bd40,0,1,0,c927aa80,...) at vm_fault+0x65 trap_pfault(f48a2a98,0,c) at trap_pfault+0xee trap(8,c06b0028,f48a0028,1,0,...) at trap+0x325 calltrap() at calltrap+0x5 --- trap 0xc, eip =3D 0xc053ea34, esp =3D 0xf48a2ad8, ebp =3D 0xf48a2ae4 --- m_copydata(0,ffffffff,1,d0020d74,c1040468,...) at m_copydata+0x28 tcp_output(d21c5570) at tcp_output+0x9af tcp_input(d0020d00,14,e9,93935ce,0,...) at tcp_input+0x24a2 ip_input(d0020d00) at ip_input+0x561 netisr_processqueue(c075a6d8) at netisr_processqueue+0x6e swi_net(0) at swi_net+0xc2 ithread_execute_handlers(c9279648,c92c3400) at ithread_execute_handlers+0xce ithread_loop(c92436a0,f48a2d38,c070db20,0,c06a818a,...) at ithread_loop+0x4e fork_exit(c04f76d4,c92436a0,f48a2d38) at fork_exit+0x61 fork_trampoline() at fork_trampoline+0x8 --- trap 0x1, eip =3D 0, esp =3D 0xf48a2d6c, ebp =3D 0 --- Fatal trap 12: page fault while in kernel mode fault virtual address =3D 0xc fault code =3D supervisor read, page not present instruction pointer =3D 0x20:0xc053ea34 stack pointer =3D 0x28:0xf48a2ad8 frame pointer =3D 0x28:0xf48a2ae4 code segment =3D base 0x0, limit 0xfffff, type 0x1b =3D DPL 0, pres 1, def32 1, gran 1 processor eflags =3D interrupt enabled, resume, IOPL =3D 0 current process =3D 13 (swi1: net) trap number =3D 12 panic: page fault KDB: stack backtrace: kdb_backtrace(100,c927aa80,28,f48a2a98,c,...) at kdb_backtrace+0x29 panic(c069b8a1,c06c5f2c,0,fffff,c927d69b,...) at panic+0xa8 trap_fatal(f48a2a98,c,c927aa80,c070bd40,0,...) at trap_fatal+0x2a6 trap_pfault(f48a2a98,0,c) at trap_pfault+0x187 trap(8,c06b0028,f48a0028,1,0,...) at trap+0x325 calltrap() at calltrap+0x5 --- trap 0xc, eip =3D 0xc053ea34, esp =3D 0xf48a2ad8, ebp =3D 0xf48a2ae4 --- m_copydata(0,ffffffff,1,d0020d74,c1040468,...) at m_copydata+0x28 tcp_output(d21c5570) at tcp_output+0x9af tcp_input(d0020d00,14,e9,93935ce,0,...) at tcp_input+0x24a2 ip_input(d0020d00) at ip_input+0x561 netisr_processqueue(c075a6d8) at netisr_processqueue+0x6e swi_net(0) at swi_net+0xc2 ithread_execute_handlers(c9279648,c92c3400) at ithread_execute_handlers+0xce ithread_loop(c92436a0,f48a2d38,c070db20,0,c06a818a,...) at ithread_loop+0x4e fork_exit(c04f76d4,c92436a0,f48a2d38) at fork_exit+0x61 fork_trampoline() at fork_trampoline+0x8 --- trap 0x1, eip =3D 0, esp =3D 0xf48a2d6c, ebp =3D 0 --- Uptime: 25m13s Dumping 3967 MB (3 chunks) chunk 0: 1MB (159 pages) ... ok chunk 1: 3966MB (1015280 pages) 3950 3934 3918 3902 3886 3870 3854 3838 3= 822 3806 3790 3774 3758 3742 3726 3710 3694 3678 3662 3646 3630 3614 3598 3= 582 3566 3550 3534 3518 3502 3486 3470 3454 3438 3422 3406 3390 3374 3358 3= 342 3326 3310 3294 3278 3262 3246 3230 3214 3198 3182 3166 3150 3134 3118 3= 102 3086 3070 3054 3038 3022 3006 2990 2974 2958 2942 2926 2910 2894 2878 2= 862 2846 2830 2814 2798 2782 2766 2750 2734 2718 2702 2686 2670 2654 2638 2= 622 2606 2590 2574 2558 2542 2526 2510 2494 2478 2462 2446 2430 2414 2398 2= 382 2366 2350 2334 2318 2302 2286 2270 2254 2238 2222 2206 2190 2174 2158 2= 142 2126 2110 2094 2078 2062 2046 2030 2014 1998 1982 1966 1950 1934 1918 1= 902 1886 1870 1854 1838 1822 1806 1790 1774 1758 1742 1726 1710 1694 1678 1= 662 1646 1630 1614 1598 1582 1566 1550 1534 1518 1502 1486 1470 1454 1438 1= 422 1406 1390 1374 1358 1342 1326 1310 1294 1278 1262 1246 1230 1214 1198 1= 182 1166 1150 1134 1118 1102 1086 1070 1054 1038 1022 1006 990 974 958 942 = 926 910 894 878 862 846 830 814 798 782 766 750 734 718 702 686 670 654 638= 622 606 590 574 558 542 526 510 494 478 462 446 430 414 398 382 366 350 33= 4 318 302 286 270 254 238 222 206 190 174 158 142 126 110 94 78 62 46 30 14= ... ok chunk 2: 1MB (128 pages) #0 doadump () at pcpu.h:165 165 pcpu.h: No such file or directory. in pcpu.h (kgdb) bt #0 doadump () at pcpu.h:165 #1 0xc050ae04 in boot (howto=3D260) at /usr/src/sys/kern/kern_shutdown.c:4= 09 #2 0xc050b05f in panic (fmt=3D0xc069b8a1 "%s") at /usr/src/sys/kern/kern_s= hutdown.c:565 #3 0xc0674fa2 in trap_fatal (frame=3D0xf48a2a98, eva=3D12) at /usr/src/sys= /i386/i386/trap.c:837 #4 0xc0674cd3 in trap_pfault (frame=3D0xf48a2a98, usermode=3D0, eva=3D12) = at /usr/src/sys/i386/i386/trap.c:745 #5 0xc0674939 in trap (frame=3D {tf_fs =3D 8, tf_es =3D -1066729432, tf_ds =3D -192282584, tf_edi =3D= 1, tf_esi =3D 0, tf_ebp =3D -192271644, tf_isp =3D -192271676, tf_ebx =3D = 4380, tf_edx =3D -1, tf_ecx =3D 0, tf_eax =3D -805171852, tf_trapno =3D 12,= tf_err =3D 0, tf_eip =3D -1068242380, tf_cs =3D 32, tf_eflags =3D 590338, = tf_esp =3D 4380, tf_ss =3D -769895056}) at /usr/src/sys/i386/i386/trap.c:435 #6 0xc0663bba in calltrap () at /usr/src/sys/i386/i386/exception.s:139 #7 0xc053ea34 in m_copydata (m=3D0x0, off=3D-1, len=3D1, cp=3D0xd0020d74 "= ") at /usr/src/sys/kern/uipc_mbuf.c:543 #8 0xc0590aeb in tcp_output (tp=3D0xd21c5570) at /usr/src/sys/netinet/tcp_= output.c:770 #9 0xc058f536 in tcp_input (m=3D0xd0020d00, off0=3D20) at /usr/src/sys/net= inet/tcp_input.c:2471 #10 0xc058755d in ip_input (m=3D0xd0020d00) at /usr/src/sys/netinet/ip_inpu= t.c:785 #11 0xc0578252 in netisr_processqueue (ni=3D0xc075a6d8) at /usr/src/sys/net= /netisr.c:236 #12 0xc057841a in swi_net (dummy=3D0x0) at /usr/src/sys/net/netisr.c:349 #13 0xc04f762e in ithread_execute_handlers (p=3D0xc9279648, ie=3D0xc92c3400= ) at /usr/src/sys/kern/kern_intr.c:682 #14 0xc04f7722 in ithread_loop (arg=3D0xc92436a0) at /usr/src/sys/kern/kern= _intr.c:765 #15 0xc04f697d in fork_exit (callout=3D0xc04f76d4 <ithread_loop>, arg=3D0xc= 92436a0, frame=3D0xf48a2d38) at /usr/src/sys/kern/kern_fork.c:821 #16 0xc0663c1c in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:= 208
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