Date: Wed, 30 Dec 2009 16:40:03 GMT From: Marius Strobl <marius@alchemy.franken.de> To: freebsd-sparc64@FreeBSD.org Subject: Re: sparc64/142102: FreeBSD 8.0 kernel panics on sparc64 when accessing NFS Message-ID: <200912301640.nBUGe39K005191@freefall.freebsd.org>
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The following reply was made to PR sparc64/142102; it has been noted by GNATS.
From: Marius Strobl <marius@alchemy.franken.de>
To: dfr@freebsd.org
Cc: Manuel Tobias Schiller <mala@hinterbergen.de>,
FreeBSD-gnats-submit@freebsd.org
Subject: Re: sparc64/142102: FreeBSD 8.0 kernel panics on sparc64 when accessing NFS
Date: Wed, 30 Dec 2009 17:36:27 +0100
On Wed, Dec 30, 2009 at 01:25:55AM +0100, Manuel Tobias Schiller wrote:
> On Tue, 29 Dec 2009 19:53:58 +0100
> Marius Strobl <marius@alchemy.franken.de> wrote:
> > Oh, sorry, I had a bug in there, the svc code used a stale
> > pointer to the mbuf with this. Could you please re-fetch
> > and try again? I can't guarantee that this fixes the hang
> > you experienced but at least in theory just re-aligning
> > the data can't make the issue with the unaligned access
> > any worse. Using the LOM or by breaking into the kernel
> > by sending a break you should be able to power-cycle/
> > reboot the machine without removing the power cord should
> > it hang again though.
> > What NFS client and with which mount options are you
> > using to trigger is problem?
> >
> > Marius
>
> I managed to compile and test a kernel with your updated patch, and things
> seem to work. I'll try to stress-test it over the night by copying a few
> tens of gigabytes over and report back with the results.
Doug,
could you please review the following patch? The problem
apparently is that nfsm_srvmtofh_xx() assumes the 4-byte
alignment required by XDR so fha_extract_info() has to
ensure that the mbuf data is aligned accordingly.
http://people.freebsd.org/~marius/fha_extract_info_realign.diff
Thanks,
Marius
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