panic: sbflush_locked on 5.4-p5/i386

[Rong-En Fan]

On 8/1/05, Alexander S. Usov <A.S.Usov at kvi.nl> wrote:
> In just 2 days of waiting I got it, however it looks that it has fired in a
> bit different place.
> 
> (kgdb) bt
> #0  doadump () at pcpu.h:159
> #1  0xc0513899 in boot (howto=260) at ../../../kern/kern_shutdown.c:410
> #2  0xc0513ede in panic (fmt=0xc06ac87f "sbdrop")
> at ../../../kern/kern_shutdown.c:566
> #3  0xc05556f4 in sbdrop_locked (sb=0xc2285ad8, len=112)
> at ../../../kern/uipc_socket2.c:1149
> #4  0xc05b27f2 in tcp_input (m=0xc1e31800, off0=152)
> at ../../../netinet/tcp_input.c:2209
> #5  0xc05a9b13 in ip_input (m=0xc1e31800) at ../../../netinet/ip_input.c:776
> #6  0xc059215e in netisr_processqueue (ni=0xc070b0f8)
> at ../../../net/netisr.c:233
> #7  0xc059241d in swi_net (dummy=0x0) at ../../../net/netisr.c:346
> #8  0xc04fb9a1 in ithread_loop (arg=0xc1979500)
> at ../../../kern/kern_intr.c:547
> #9  0xc04fa9dc in fork_exit (callout=0xc04fb8ea <ithread_loop>, arg=0x0,
> frame=0x0)    at ../../../kern/kern_fork.c:791
> #10 0xc0656a8c in fork_trampoline () at ../../../i386/i386/exception.s:209

I also got a panic:sbdrop, but a bit different on path:
http://www.rafan.org/FreeBSD/5.4-so/panic-sbdrop
(but no dump)

And, another one with trap 12
http://www.rafan.org/FreeBSD/5.4-so/panic-trap12
I have dump for this, but kgdb cant read it :-(
It says "cannot read PTD".

This machine is our main www server,  so I have to make it as stable
as possible. I might be able to switch mpsafenet at night.

By the way, I have accf_http(4) and accf_data(4) compiled in. But
with or without them, I can easily get panic with mpsafenet in less
half day.



> 
> I am going to keep it around for some time, so I can easisy do a full bt or
> variables.
> 
> 
> Corresponding dmesg & sysctl output can be found at
> https://kvip88.kvi.nl/~usov
> 
> 
> --
> Best regards,
>   Alexander.
> 
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