panic: sbflush_locked on 5.4-p5/i386

[Robert Watson]

On Fri, 29 Jul 2005, Robert Watson wrote:

> This sounds like a race between two threads in the TCP code, but to 
> diagnose it further, I'll need to know what else is running.  If you 
> have access to serial gdb, I'd be quite interested in seeing the output 
> of "l *so" in the sofree() frame, *tp in a tcp-related frame, and *inp 
> if it's available in one of those frames, likely the in_pcbdetach() 
> frame or tcp_close() frame if it's there.

In the above, print *whatever rather than l *whatever, as I want structure 
contents.

Thanks!

Robert N M Watson

>
> Would it be possible to add an extra ATA disk to use for swap and capturing a 
> core dump?
>
> Robert N M Watson
>
>
>> 
>> Google told me that 
>> http://lists.freebsd.org/pipermail/freebsd-current/2004-December/044535.html 
>> looks related. But the code path is different. Note that the patch in that 
>> mail is already in 5.4.
>> 
>> If needed, I can provide kernel conf. I also tuned following sysctls:
>> vfs.hirunningspace=2097152
>> kern.ipc.somaxconn=4096
>> kern.maxfiles=30000
>> kern.maxfilesperproc=30000
>> net.inet.ip.random_id=1
>> machdep.hyperthreading_allowed=1
>> 
>> The DDB messages go here:
>> cpuid = 3
>> KDB: enter: panic
>> [thread pid 61 tid 100061 ]
>> Stopped at      kdb_enter+0x2b: nop
>> db> wh
>> Tracing pid 61 tid 100061 td 0xc311e180
>> kdb_enter(c05f3bc6) at kdb_enter+0x2b
>> panic(c05f6f09,0,c33bf000,ffffff00,c3a1970c) at panic+0x127
>> sbflush_locked(c3a1970c,c3a19654,e74aeba4,c04e4cb4,c3a1970c) at
>> sbflush_locked+0x6f
>> sbrelease_locked(c3a1970c,c3a19654) at sbrelease_locked+0xd
>> sofree(c3a19654) at sofree+0x26c
>> in_pcbdetach(c371d870,c3e996f0,c3e996f0,e74aec9c,c05355df) at 
>> in_pcbdetach+0xb6
>> tcp_close(c3e996f0,1,1,1042e,1) at tcp_close+0x16
>> tcp_input(c4513400,14,1c1e708c,0,0) at tcp_input+0x2297
>> ip_input(c4513400) at ip_input+0x4f1
>> netisr_processqueue(c0643298) at netisr_processqueue+0xa3
>> swi_net(0) at swi_net+0xf2
>> ithread_loop(c3094c80,e74aed48) at ithread_loop+0x159
>> fork_exit(c049c138,c3094c80,e74aed48) at fork_exit+0x75
>> fork_trampoline() at fork_trampoline+0x8
>> --- trap 0x1, eip = 0, esp = 0xe74aed7c, ebp = 0 ---
>> db> ps
>>   61 c311ce20    0     0     0 0000204 [CPU 3] swi1: net
>> 
>> Regards,
>> Rong-En Fan
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