deadlock in "zoneli" state on 6.2-PRERELEASE
Nikolay Pavlov
quetzal at zone3000.net
Sat Nov 25 13:20:42 PST 2006
On Sunday, 26 November 2006 at 2:13:33 +0800, LI Xin wrote:
> Nikolay Pavlov wrote:
> > 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 at delphij.net wrote:
> >>>> Hi,
> >>>>
> >>>> On Wed, 22 Nov 2006 21:55:49 +0200, Nikolay Pavlov <quetzal at zone3000.net> 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,
> >>> 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.
>
> I think these stuff is enough. By the way, which scheduler do you use?
4BSD
>
> > root at 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 conditions.
> > 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_backtrace+0x29
> > witness_checkorder(c070bd84,9,c06be56c,c02,c070d2c4,0,c06aab25,9f) at witness_checkorder+0x4cd
> > _sx_xlock(c070bd84,c06be56c,c02) at _sx_xlock+0x2c
> > _vm_map_lock_read(c070bd40,c06be56c,c02,184637d,c92796b0,...) at _vm_map_lock_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 = 0xc053ea34, esp = 0xf48a2ad8, ebp = 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 = 0, esp = 0xf48a2d6c, ebp = 0 ---
> >
> >
> > Fatal trap 12: page fault while in kernel mode
> > fault virtual address = 0xc
> > fault code = supervisor read, page not present
> > instruction pointer = 0x20:0xc053ea34
> > stack pointer = 0x28:0xf48a2ad8
> > frame pointer = 0x28:0xf48a2ae4
> > 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 = 13 (swi1: net)
> > trap number = 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 = 0xc053ea34, esp = 0xf48a2ad8, ebp = 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 = 0, esp = 0xf48a2d6c, ebp = 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 3822 3806 3790 3774 3758 3742 3726 3710 3694 3678 3662 3646 3630 3614 3598 3582 3566 3550 3534 3518 3502 3486 3470 3454 3438 3422 3406 3390 3374 3358 3342 3326 3310 3294 3278 3262 3246 3230 3214 3198 3182 3166 3150 3134 3118 3102 3086 3070 3054 3038 3022 3006 2990 2974 2958 2942 2926 2910 2894 2878 2862 2846 2830 2814 2798 2782 2766 2750 2734 2718 2702 2686 2670 2654 2638 2622 2606 2590 2574 2558 2542 2526 2510 2494 2478 2462 2446 2430 2414 2398 2382 2366 2350 2334 2318 2302 2286 2270 2254 2238 2222 2206 2190 2174 2158 2142 2126 2110 2094 2078 2062 2046 2030 2014 1998 1982 1966 1950 1934 1918 1902 1886 1870 1854 1838 1822 1806 1790 1774 1758 1742 1726 1710 1694 1678 1662 1646 1630 1614 1598 1582 1566 1550 1534 1518 1502 1486 1470 1454 1438 1422 1406 1390 1374 1358 1342 1326 1310 1294 1278 1262 1246 1230 1214 1198 1182 1166 1150 1134 1118 1102 1086 1070 1054 1038 1022 1006 990 974 958 942 926 910 894 8
> 78 862 846 830 814 798 782 766 750 734 718 702 686 670 654 638 622 606 590 574 558 542 526 510 494 478 462 446 430 414 398 382 366 350 334 318 302 286 270 254 238 222 206 190 174 158 142 126 110 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=260) at /usr/src/sys/kern/kern_shutdown.c:409
> > #2 0xc050b05f in panic (fmt=0xc069b8a1 "%s") at /usr/src/sys/kern/kern_shutdown.c:565
> > #3 0xc0674fa2 in trap_fatal (frame=0xf48a2a98, eva=12) at /usr/src/sys/i386/i386/trap.c:837
> > #4 0xc0674cd3 in trap_pfault (frame=0xf48a2a98, usermode=0, eva=12) at /usr/src/sys/i386/i386/trap.c:745
> > #5 0xc0674939 in trap (frame=
> > {tf_fs = 8, tf_es = -1066729432, tf_ds = -192282584, tf_edi = 1, tf_esi = 0, tf_ebp = -192271644, tf_isp = -192271676, tf_ebx = 4380, tf_edx = -1, tf_ecx = 0, tf_eax = -805171852, tf_trapno = 12, tf_err = 0, tf_eip = -1068242380, tf_cs = 32, tf_eflags = 590338, tf_esp = 4380, tf_ss = -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=0x0, off=-1, len=1, cp=0xd0020d74 "") at /usr/src/sys/kern/uipc_mbuf.c:543
> > #8 0xc0590aeb in tcp_output (tp=0xd21c5570) at /usr/src/sys/netinet/tcp_output.c:770
> > #9 0xc058f536 in tcp_input (m=0xd0020d00, off0=20) at /usr/src/sys/netinet/tcp_input.c:2471
> > #10 0xc058755d in ip_input (m=0xd0020d00) at /usr/src/sys/netinet/ip_input.c:785
> > #11 0xc0578252 in netisr_processqueue (ni=0xc075a6d8) at /usr/src/sys/net/netisr.c:236
> > #12 0xc057841a in swi_net (dummy=0x0) at /usr/src/sys/net/netisr.c:349
> > #13 0xc04f762e in ithread_execute_handlers (p=0xc9279648, ie=0xc92c3400) at /usr/src/sys/kern/kern_intr.c:682
> > #14 0xc04f7722 in ithread_loop (arg=0xc92436a0) at /usr/src/sys/kern/kern_intr.c:765
> > #15 0xc04f697d in fork_exit (callout=0xc04f76d4 <ithread_loop>, arg=0xc92436a0, frame=0xf48a2d38) at /usr/src/sys/kern/kern_fork.c:821
> > #16 0xc0663c1c in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:208
>
> Cheers,
> --
> Xin LI <delphij at delphij.net> http://www.delphij.net/
> FreeBSD - The Power to Serve!
>
--
======================================================================
- Best regards, Nikolay Pavlov. <<<-----------------------------------
======================================================================
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