Re: Kernel oops in read()

From: John Goerzen (jgoerzen@complete.org)
Date: Thu Jun 01 2000 - 20:20:00 EST

Thanks for the tip. I did try it but it produced zero useful output.
Perhaps it does not work on Alpha. This is why I went to the effort
of producing sample code to generate the problem in a reproducible
way.

-- John

Marcelo Tosatti <marcelo@conectiva.com.br> writes:

> On 1 Jun 2000, John Goerzen wrote:
>
> > Unable to handle kernel paging request at virtual address 0000000000000000
> > test(3515): Oops 1
> > pc = [<fffffc0000468a74>] ra = [<fffffc0000335140>] ps = 0000
> > v0 = 0000000000001f9e t0 = 0150000000000000 t1 = 0000000000000150
> > t2 = 0000000000000000 t3 = 0000000000001f90 t4 = 0000000000000114
> > t5 = 0000000000000000 t6 = fffffc000fb3c062 t7 = fffffc0008710000
> > s0 = 0000000000001f9e s1 = fffffc0000793b28 s2 = fffffc00000309e0
> > s3 = 0000000000000000 s4 = 0000000000000000 s5 = fffffc000029dd40
> > s6 = 0000000000000000 a0 = fffffc0008713ec8 a1 = fffffc000fb3c062
> > a2 = 0000000000001f9e a3 = fffffc0000335400 a4 = ffffffffffffffff
> > a5 = 0000000000000007 t8 = 0000000000001f9e t9 = 00000000696e8000
> > t10= 3000000000000000 t11= 000000000000000a pv = fffffc00004689e0
> > at = fffffc000033542c gp = fffffc00004e3c78 sp = fffffc0008713e38
> > Code:
> > 2fe00000 ldq_u zero,0(v0)
> > 2c470008 ldq_u t1,8(t6)
> > 40811524 subq t3,8,t3
> > 486706c3 extql t2,t6,t2
> > 48470f41 ALU t1,t6,t0
> > 44610401 or t2,t0,t0
> > *b4260000 stq t0,0(t5)
> > 40e11407 addq t6,8,t6
> > Trace: 3354d8 335400 34238c 310e4c
>
> >From the linux-kernel mailing list FAQ:
>
> "(REG) Don't even bother posting an Oops if you haven't run it through
> ksymoops to decode the symbol addresses. The report will be ignored
> because it contains too little useful information."
>
> Read /usr/src/linux/Documentation/oops-tracing.txt to know how to use
> ksymoops.
>
>
>
> 

-- 
John Goerzen   Linux, Unix consulting & programming   jgoerzen@complete.org |
Developer, Debian GNU/Linux (Free powerful OS upgrade)       www.debian.org |
----------------------------------------------------------------------------+
The 571,352nd digit of pi is 1.

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