ktr/alq/witness failure.
From: Julian Elischer (julian_at_elischer.org)
Date: 09/27/04
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Date: Sun, 26 Sep 2004 23:15:05 -0700 To: Current <freebsd-current@freebsd.org>, John Baldwin <jhb@freebsd.org>
I'm not going to stop and debug this now because I'm chasing another
problem but I can probably stash a corefile somewhere if people want it..
ref4# sysctl debug.ktr.mask=0x2fffffff
debug.ktr.mask: 262144
->
805306367
ref4#
ref4#
ref4# sysctl debug.ktr.mask=0x0
kernel trap 12 with interrupts disabled
Fatal double fault:
eip = 0xc053336e
esp = 0xcbaa3ff4
ebp = 0xcbaa401c
cpuid = 0; apic id = 00
panic: double fault
cpuid = 0
KDB: enter: panic
[thread 100027]
Stopped at kdb_enter+0x2b: nop
db> tr
kdb_enter(c069adef) at kdb_enter+0x2b
panic(c06b581a,c06b59c4,0,0,0) at panic+0x127
dblfault_handler() at dblfault_handler+0x7a
--- trap 0x17, eip = 0xc053336e, esp = 0xcbaa3ff4, ebp = 0xcbaa401c ---
witness_checkorder(c111776c,9,c06b5972,2bb) at witness_checkorder+0x6a
_mtx_lock_flags(c111776c,0,c06b5972,2bb,c10e3a80) at _mtx_lock_flags+0x5b
trap_pfault(cbaa40ac,0,608) at trap_pfault+0xb4
trap(18,5f660010,63730010,9,c111776c) at trap+0x335
calltrap() at calltrap+0x5
--- trap 0xc, eip = 0xc0533495, esp = 0xcbaa40ec, ebp = 0xcbaa4114 ---
witness_checkorder(c111776c,9,c06b597b,2bb) at witness_checkorder+0x191
_mtx_lock_flags(c111776c,0,c06b5972,2bb,c10e3a80) at _mtx_lock_flags+0x5b
trap_pfault(cbaa41a4,0,608) at trap_pfault+0xb4
trap(9700018,705f0010,6b2e0010,9,c111776c) at trap+0x335
---- etc. (LOTS OF IDENTICAL FRAMES REMOVED) ---- --- trap 0xc, eip = 0xc0533495, esp = 0xcbaa5734, ebp = 0xcbaa575c --- witness_checkorder(c111776c,9,c06b597b,2bb) at witness_checkorder+0x191 _mtx_lock_flags(c111776c,0,c06b5972,2bb,c10e3a80) at _mtx_lock_flags+0x5b trap_pfault(cbaa57ec,0,608) at trap_pfault+0xb4 trap(18,10,c0710010,9,c111776c) at trap+0x335 calltrap() at calltrap+0x5 --- trap 0xc, eip = 0xc0533495, esp = 0xcbaa582c, ebp = 0xcbaa5854 --- witness_checkorder(c111776c,9,c06b597b,2bb) at witness_checkorder+0x191 _mtx_lock_flags(c111776c,0,c06b5972,2bb,c10e3a80) at _mtx_lock_flags+0x5b trap_pfault(cbaa58e4,0,608) at trap_pfault+0xb4 trap(c10e0018,c0750010,c0750010,9,c111776c) at trap+0x335 calltrap() at calltrap+0x5 --- trap 0xc, eip = 0xc0533495, esp = 0xcbaa5924, ebp = 0xcbaa594c --- witness_checkorder(c111776c,9,c06b597b,2bb) at witness_checkorder+0x191 _mtx_lock_flags(c111776c,0,c06b5972,2bb,c10e3a80) at _mtx_lock_flags+0x5b trap_pfault(cbaa59dc,0,608) at trap_pfault+0xb4 trap(18,c10e0010,cbaa0010,9,c06fa2e0) at trap+0x335 calltrap() at calltrap+0x5 --- trap 0xc, eip = 0xc0533495, esp = 0xcbaa5a1c, ebp = 0xcbaa5a44 --- witness_checkorder(c06fa2e0,9,c0697593,1d3) at witness_checkorder+0x191 _mtx_lock_flags(c06fa2e0,0,c069758a,1d3,c069851a) at _mtx_lock_flags+0x5b alq_post(c13f3300,c15f5638) at alq_post+0x60 ktr_tracepoint(200,c0698511,186,c06985f6,c0674241,19,c10e2a08,0,0,0) at ktr_tracepoint+0x17e ithread_schedule(c10d7900,e,c10e3a80,c15e7420,c06f00d0) at ithread_schedule+0x6b intr_execute_handlers(c06f00d0,cbaa5b50,c15e7420,5fb,c10e3af0) at intr_execute_handlers+0x131 atpic_handle_intr(e) at atpic_handle_intr+0x92 Xatpic_intr14() at Xatpic_intr14+0x20 --- interrupt, eip = 0xc053392a, esp = 0xcbaa5b94, ebp = 0xcbaa5ba4 --- witness_lock(c15e7420,8,c06a219e,5fb,c6342b10) at witness_lock+0xc2 _mtx_lock_flags(c15e7420,0,c06a2195,5fb) at _mtx_lock_flags+0x97 bqrelse(c6342b10) at bqrelse+0xe7 bufdone(c6342b10) at bufdone+0x446 cluster_callback(c62e64c0) at cluster_callback+0xa6 bufdone(c62e64c0,c0709820,0,c06a2195,c14) at bufdone+0x13b bufdonebio(c62e64c0) at bufdonebio+0x24 biodone(c62e64c0,c15da18c,c15da18c,cbaa5cd0,cbaa5cb0) at biodone+0x57 g_dev_done(c15da18c) at g_dev_done+0x5b biodone(c15da18c,cbaa5cd0,0,c0695cbe,1c1) at biodone+0x57 g_io_schedule_up(c10e3a80) at g_io_schedule_up+0xb5 g_up_procbody(0,cbaa5d48,0,c04e4dbc,0) at g_up_procbody+0x32 fork_exit(c04e4dbc,0,cbaa5d48) at fork_exit+0xd4 fork_trampoline() at fork_trampoline+0x8 --- trap 0x1, eip = 0, esp = 0xcbaa5d7c, ebp = 0 --- db> show pcpu cpuid = 0 curthread = 0xc10e3a80: pid 3 "g_up" curpcb = 0xcbaa5da0 fpcurthread = none idlethread = 0xc10da480: pid 11 "idle: cpu0" APIC ID = 0 currentldt = 0x28 spin locks held: db> db> show witness Sleep locks: 0 ATAPI CD bioqueue lock -- last acquired @ dev/ata/atapi-cd.c:1100 0 g_xdown -- last acquired @ geom/geom_io.c:392 4 ATA disk bioqueue lock -- last acquired @ dev/ata/ata-disk.c:236 4 ATA queue lock -- last acquired @ dev/ata/ata-queue.c:176 5 ATA state lock -- last acquired @ dev/ata/ata-queue.c:182 4 bio queue -- last acquired @ geom/geom_io.c:65 12 system map -- last acquired @ vm/vm_kern.c:296 13 kmem object -- last acquired @ vm/vm_kern.c:398 14 vm page queue mutex -- last acquired @ kern/vfs_bio.c:3217 15 CMAPCADDR12 -- last acquired @ i386/i386/pmap.c:2473 15 vnode interlock -- last acquired @ kern/vfs_bio.c:1531 16 cdev -- last acquired @ kern/kern_conf.c:81 16 vnode_free_list -- last acquired @ kern/vfs_subr.c:575 16 Syncer mtx -- last acquired @ kern/vfs_subr.c:1846 16 Name Cache -- last acquired @ kern/vfs_cache.c:352 15 pmap -- last acquired @ i386/i386/pmap.c:1901 16 uma object -- last acquired @ vm/uma_core.c:963 16 UMA pcpu -- last acquired @ vm/uma_core.c:2206 17 KMAP ENTRY -- last acquired @ vm/uma_core.c:2224 18 UMA zone -- last acquired @ vm/uma_core.c:2224 13 kernel object -- last acquired @ kern/vfs_bio.c:3671 14 vm page queue mutex -- (already displayed) 0 g_xup -- last acquired @ geom/geom_io.c:449 1 g_disk_done -- last acquired @ geom/geom_disk.c:196 4 bio queue -- (already displayed) 16 UMA pcpu -- (already displayed) 3 Giant -- last acquired @ kern/vfs_bio.c:3092 4 struct mount mtx -- last acquired @ ufs/ffs/ffs_vfsops.c:1147 15 vnode interlock -- (already displayed) 4 UMA lock -- last acquired @ vm/uma_core.c:1466 12 Malloc Stats -- last acquired @ kern/kern_malloc.c:210 16 UMA pcpu -- (already displayed) 4 eventhandler -- last acquired @ kern/subr_eventhandler.c:213 5 eventhandler list -- last acquired @ kern/kern_exit.c:199 4 standard object -- last acquired @ kern/vfs_bio.c:3198 5 vm object_list -- last acquired @ vm/vm_object.c:643 14 vm page queue mutex -- (already displayed) 4 kernel linker -- last acquired @ kern/kern_linker.c:1061 4 vm86 lock -- last acquired @ i386/i386/vm86.c:582 4 TID lock -- last acquired @ kern/kern_thread.c:206 4 kobj -- last acquired @ kern/subr_kobj.c:298 4 GEOM orphanage -- last acquired @ geom/geom_event.c:170 4 ithread -- last acquired @ kern/kern_intr.c:276 4 bounce pages lock -- last acquired @ i386/i386/busdma_machdep.c:860 4 bpf global lock -- last acquired @ net/bpf.c:1446 5 bpf interface lock -- last acquired @ order list:0 6 bpf cdev lock -- last acquired @ order list:0 4 rman -- last acquired @ kern/subr_rman.c:448 12 Malloc Stats -- (already displayed) 12 system map -- (already displayed) 4 taskqueue list -- last acquired @ kern/subr_taskqueue.c:85 4 rman head -- last acquired @ kern/subr_rman.c:111 4 sf_buf -- last acquired @ i386/i386/vm_machdep.c:674 4 bio queue -- (already displayed) 4 rtsock route_cb lock -- last acquired @ net/rtsock.c:234 4 devstat -- last acquired @ kern/subr_devstat.c:190 4 if_cloners lock -- last acquired @ net/if_clone.c:199 4 buffer daemon lock -- last acquired @ kern/vfs_bio.c:408 4 pseudofs -- last acquired @ fs/pseudofs/pseudofs_fileno.c:86 4 ttylist -- last acquired @ kern/tty.c:2757 11 tty -- last acquired @ kern/kern_event.c:1451 4 fdesc -- last acquired @ kern/kern_descrip.c:1614 5 filedesc structure -- last acquired @ kern/kern_descrip.c:1926 6 devd -- last acquired @ kern/subr_bus.c:497 9 sellck -- last acquired @ kern/sys_generic.c:726 6 accept -- last acquired @ kern/uipc_socket.c:334 7 so_snd -- last acquired @ kern/uipc_socket.c:2091 8 so_rcv -- last acquired @ kern/uipc_socket.c:2092 9 sellck -- (already displayed) 9 radix node head -- last acquired @ netinet/if_ether.c:139 10 ifnet -- last acquired @ net/if.c:1019 10 rtentry -- last acquired @ netinet/if_ether.c:785 11 rts_inq -- last acquired @ net/netisr.c:231 11 network driver -- last acquired @ dev/fxp/if_fxp.c:1756 12 knlist lock for lockless objects -- last acquired @ kern/kern_event.c:1451 12 Malloc Stats -- (already displayed) 12 if send queue -- last acquired @ dev/fxp/if_fxp.c:1268 12 system map -- (already displayed) 11 ifaddr -- last acquired @ netinet6/nd6_nbr.c:1235 9 process lock -- last acquired @ ufs/ffs/ffs_vnops.c:613 10 sigacts -- last acquired @ kern/kern_sig.c:294 10 ktrace -- last acquired @ kern/kern_fork.c:607 10 struct pargs.ref -- last acquired @ kern/kern_proc.c:1078 10 session -- last acquired @ kern/kern_proc.c:317 11 tty -- (already displayed) 15 vnode interlock -- (already displayed) 11 uidinfo hash -- last acquired @ kern/kern_resource.c:1001 12 sleep mtxpool -- last acquired @ kern/kern_prot.c:1755 12 uidinfo struct -- last acquired @ order list:0 13 allprison -- last acquired @ kern/kern_jail.c:460 6 pipe mutex -- last acquired @ kern/sys_pipe.c:1520 9 sellck -- (already displayed) 7 sigio lock -- last acquired @ kern/kern_descrip.c:729 8 process group -- last acquired @ kern/kern_proc.c:393 9 process lock -- (already displayed) 4 if_clone lock -- last acquired @ net/if_clone.c:321 4 pfil_head_mtx -- last acquired @ net/pfil.c:166 5 pfil_head_list lock -- last acquired @ net/pfil.c:172 4 lo_mtx -- last acquired @ net/if_loop.c:154 4 nfsd_mtx -- last acquired @ nfsserver/nfs_srvsock.c:811 4 pbuf mutex -- last acquired @ vm/vm_pager.c:414 4 domain list -- last acquired @ kern/uipc_domain.c:110 4 mntid -- last acquired @ kern/vfs_subr.c:400 5 mountlist -- last acquired @ kern/vfs_subr.c:3456 4 ATA disk bioqueue lock -- (already displayed) 4 ATA queue lock -- (already displayed) 4 taskqueue -- last acquired @ kern/subr_taskqueue.c:193 4 pseudofs_vncache -- last acquired @ fs/pseudofs/pseudofs_vncache.c:239 4 udp -- last acquired @ netinet/udp_usrreq.c:1052 5 udp6inp -- last acquired @ netinet6/udp6_usrreq.c:670 8 so_rcv -- (already displayed) 5 udpinp -- last acquired @ netinet/udp_usrreq.c:1058 6 arc4_mtx -- last acquired @ libkern/arc4random.c:137 6 accept -- (already displayed) 4 ufs ihash -- last acquired @ ufs/ufs/ufs_ihash.c:120 15 vnode interlock -- (already displayed) 4 dirhash list -- last acquired @ ufs/ufs/ufs_dirhash.c:348 5 dirhash -- last acquired @ ufs/ufs/ufs_dirhash.c:349 4 runningbufspace lock -- last acquired @ kern/vfs_bio.c:317 5 ALDmtx -- last acquired @ kern/kern_alq.c:195 4 bdone lock -- last acquired @ kern/vfs_bio.c:3012 4 needsbuffer lock -- last acquired @ kern/vfs_bio.c:298 4 buf queue lock -- last acquired @ kern/vfs_bio.c:1520 15 vnode interlock -- (already displayed) 4 accounting -- last acquired @ kern/kern_acct.c:232 4 tcp -- last acquired @ netinet/tcp_timer.c:138 5 tcpinp -- last acquired @ netinet/tcp_timer.c:184 6 so_glabel -- last acquired @ kern/uipc_socket.c:282 6 tcp_hc_entry -- last acquired @ netinet/tcp_hostcache.c:713 6 random reseed -- last acquired @ dev/random/yarrow.c:193 6 arc4_mtx -- (already displayed) 6 accept -- (already displayed) 4 protect sysfilt_ops -- last acquired @ kern/kern_event.c:667 4 unp -- last acquired @ kern/uipc_usrreq.c:247 6 accept -- (already displayed) 0 arp_inq -- last acquired @ net/netisr.c:231 0 ip6qlock -- last acquired @ netinet6/frag6.c:682 0 igmp_mtx -- last acquired @ netinet/igmp.c:431 0 ip_inq -- last acquired @ net/netisr.c:231 0 ipqlock -- last acquired @ netinet/ip_input.c:1096 0 sem -- last acquired @ kern/sysv_sem.c:1174 0 if_afdata -- last acquired @ net/if.c:489 0 GEOM topology -- last acquired @ geom/geom_event.c:202 4 bio queue -- (already displayed) 4 GEOM orphanage -- (already displayed) 4 bdone lock -- (already displayed) 12 Malloc Stats -- (already displayed) 4 devstat -- (already displayed) 12 system map -- (already displayed) 4 ATA queue lock -- (already displayed) 1 swapdev -- last acquired @ vm/swap_pager.c:2127 0 p_peers -- last acquired @ kern/kern_exit.c:243 0 module subsystem sx lock -- last acquired @ kern/kern_module.c:404 0 rawcb -- last acquired @ net/raw_usrreq.c:80 8 so_rcv -- (already displayed) 0 kernel environment -- last acquired @ kern/kern_environment.c:285 0 sysctl lock -- last acquired @ kern/kern_sysctl.c:1315 1 addrsel_lock -- last acquired @ netinet6/in6_src.c:1137 1 malloc -- last acquired @ kern/kern_malloc.c:588 1 rip -- last acquired @ netinet/raw_ip.c:845 1 filelist lock -- last acquired @ kern/kern_descrip.c:1388 5 filedesc structure -- (already displayed) 1 allproc -- last acquired @ kern/sched_4bsd.c:428 2 user map -- last acquired @ vm/vm_glue.c:175 3 Giant -- (already displayed) 0 ddp_list_mtx -- last acquired @ order list:0 1 ddp_mtx -- last acquired @ order list:0 0 slip_mtx -- last acquired @ order list:0 1 slip sc_mtx -- last acquired @ order list:0 0 proctree -- last acquired @ kern/kern_prot.c:401 1 allproc -- (already displayed) Spin locks: Locks which were never acquired: swap_pager swhash scope6_lock ip6_inq pseudofs_fileno tunmtx msq semid msdosfs dehash nfs4dev state nfs4dev waitq nfs4dev newq cd9660_ihash agp lock callout_wait_lock fifo mutex UUID generator mutex lock umtx jumbo mutex accept_filter_mtx encapmtx securelevel mutex lock kqueue order phys_pager list dev_pager list dev_pager create swap_pager list vm map sleep mutex lockmgr PMAP2 db> _______________________________________________ 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- Previous message: David G. Lawrence: "Re: Interesting code in exec_setregs"
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