Re: panic: blockable sleep lock (sleep mutex) Giant _at_ kern/kern_intr.c:661

On Thursday 02 March 2006 18:59, Kris Kennaway wrote:
> Updated to -current, panicked at boot:
> 
> Timecounters tick evpanic: blockable sleep lock (sleep mutex) Giant _at_ kern/kern_intr.c:661
> cpuid = 0
> KDB: enter: panic
> [thread pid 30 tid 100035 ]
> Stopped at      kdb_enter+0x30: leave
> db> wh
> Tracing pid 30 tid 100035 td 0xcc5b7bd0
> kdb_enter(c072c0f6,0,c07303fc,f5893c50,cc5b7bd0) at kdb_enter+0x30
> panic(c07303fc,c074362d,c073e0e1,c07294ca,295) at panic+0x13f
> witness_checkorder(c07939e8,9,c07294ca,295,c07999f8) at witness_checkorder+0xd6
> _mtx_lock_flags(c07939e8,0,c07294c1,295,2) at _mtx_lock_flags+0x94
> ithread_execute_handlers(cc5c1000,cc5f8c80,c052b648,c07939d0,cc5b7bd0) at ithread_execute_handlers+0x10c
> ithread_loop(cc5d3440,f5893d38,c07292b7,31a,cc5d3440) at ithread_loop+0x78
> fork_exit(c051d959,cc5d3440,f5893d38) at fork_exit+0xc5
> fork_trampoline() at fork_trampoline+0x8
> --- trap 0x1, eip = 0, esp = 0xf5893d6c, ebp = 0 ---

Something has leaked a critical section.  Do you have witness_skipspin enabled?
Can you try turning it off?  It's probably a missing unlock of a spin mutex
somewhere.

> db> ps
>   pid   proc     uid  ppid  pgrp  flag   stat  wmesg    wchan  cmd
>    30 cc5c1000    0     0     0 0000204 [CPU 0] swi0: sio
>    29 cc5c1234    0     0     0 0000204 [IWAIT] irq1: atkbd0
>    28 cc5c1468    0     0     0 0000204 [RUNQ] fdc0
>    27 cc4cc69c    0     0     0 0000204 [IWAIT] irq15: ata1
>    26 cc4cc8d0    0     0     0 0000204 [IWAIT] irq14: ata0
>    25 cc4ccb04    0     0     0 0000204 [IWAIT] irq18: fxp1
>    24 cc4ccd38    0     0     0 0000204 [IWAIT] irq17: fxp0
>    23 cc531000    0     0     0 0000204 [RUNQ] aic_recovery1
>    22 cc531234    0     0     0 0000204 [IWAIT] irq77: ahc1
>     9 cc531468    0     0     0 0000204 [RUNQ] aic_recovery1
>     8 cc53169c    0     0     0 0000204 [RUNQ] aic_recovery0
>    21 cc5318d0    0     0     0 0000204 [IWAIT] irq76: ahc0
>     7 cc531b04    0     0     0 0000204 [RUNQ] aic_recovery0
>    20 cc47e234    0     0     0 0000204 [IWAIT] swi2: cambio
>    19 cc47e468    0     0     0 0000204 [IWAIT] swi5: +
>     6 cc47e69c    0     0     0 0000204 [RUNQ] thread taskq
>    18 cc47e8d0    0     0     0 0000204 [IWAIT] swi6: Giant taskq
>    17 cc47eb04    0     0     0 0000204 [IWAIT] swi6: task queue
>     5 cc47ed38    0     0     0 0000204 [RUNQ] kqueue taskq
>    16 cc4cc000    0     0     0 0000204 [RUNQ] yarrow
>     4 cc4cc234    0     0     0 0000204 [RUNQ] g_down
>     3 cc4cc468    0     0     0 0000204 [RUNQ] g_up
>     2 cc479000    0     0     0 0000204 [RUNQ] g_event
>    15 cc479234    0     0     0 0000204 [IWAIT] swi1: net
>    14 cc479468    0     0     0 0000204 [IWAIT] swi3: vm
>    13 cc47969c    0     0     0 000020c [RUNQ] swi4: clock sio
>    12 cc4798d0    0     0     0 000020c [Can run] idle: cpu0
>    11 cc479b04    0     0     0 000020c [Can run] idle: cpu1
>     1 cc479d38    0     0     0 0000200 [INACTIVE] swapper
>    10 cc47e000    0     0     0 0000204 [RUNQ] audit_worker
>     0 c0792020    0     0     0 0000200 [RUNQ] swapper
> db> show alllocks
> Process 0 () thread 0xc0792258 (0)
> exclusive sleep mutex Giant r = 0 (0xc07939e8) locked _at_ vm/vm_contig.c:583
> 
> Kris

-- 
John Baldwin <jhb_at_FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org