Re: kern/41974: panic in cpu_in_cksum / likely NFS issue

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Wed, Sep 02, 2009 at 06:00:00AM +0000, spz%NetBSD.org@localhost wrote:
> Machine: amd64
> >Description:
>       This has been greeting me at least 4 times now:
> 
> uvm_fault(0xffffffff80b662c0, 0xffff80012da62000, 1) -> e
> fatal page fault in supervisor mode
> trap type 6 code 0 rip ffffffff80465425 cs 8 rflags 10206 cr2  
> ffff80012da62000 cpl 4 rsp ffff80003232c2b8
> kernel: page fault trap, code=0
> Stopped in pid 0.47 (system) at netbsd:cpu_in_cksum+0xa5:       movl    
> 0(%rbx),
> %ecx
> db{0}> bt
> cpu_in_cksum() at netbsd:cpu_in_cksum+0xa5
> uvm_fault(0xffffffff80b87e60, 0x0, 1) -> e

Looks a lot like what I'm seeing on a UP alpha NFS client. This seems to
be related do the server going away and back (I suspect it's the same
for this client).

See http://mail-index.netbsd.org/current-users/2008/12/23/msg006816.html
and followups


-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--