Date: Wed, 12 May 1999 01:28:42 +0800 From: Peter Wemm <peter@netplex.com.au> To: Pierre Beyssac <beyssac@enst.fr> Cc: freebsd-bugs@freebsd.org, bob@pmr.com, FreeBSD-gnats-submit@freebsd.org Subject: kern/10872: Panic in sorecieve() Message-ID: <19990511172845.275B51F72@spinner.netplex.com.au> In-Reply-To: Your message of "Tue, 11 May 1999 18:59:56 %2B0200." <19990511185956.A12679@enst.fr>
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Pierre Beyssac wrote:
> I was looking into PR kern/10872, hoping to find an easily fixable
> occurence of NULL mbuf pointer. But it doesn't seem to be.
I just looked at the PR. He's running:
ahc0: <Adaptec 2940 SCSI adapter> rev 0x00 int a irq 12 on pci0.10.0
ahc0: aic7870 Single Channel A, SCSI Id=7, 16/255 SCBs
ncr0: <ncr 53c810 fast10 scsi> rev 0x01 int a irq 11 on pci0.12.0
ncr1: <ncr 53c875 fast20 wide scsi> rev 0x03 int a irq 9 on pci0.13.0
It should be noted that freefall had a severe case of problems like this
that all but disappeared when the ncr cards were swapped for an ahc2940U2W.
Quite how this should make such a dramatic difference is a bit of a
mystery. We were seeing really strange things like a bit of the kernel
stack being partly trashed and messing up some local variables..
Cheers,
-Peter
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