Re: 2.6.23: random segfaults

[Paul M. <le...@li...>]

On Mon, Nov 05, 2007 at 08:49:54AM +0100, Manuel Lauss wrote:
> On Mon, Nov 05, 2007 at 04:37:07PM +0900, Paul Mundt wrote:
> > On Wed, Oct 17, 2007 at 12:32:45PM -0400, Mike Frysinger wrote:
> > > On Wednesday 17 October 2007, Paul Mundt wrote:
> > > i'm seeing random crashes on my lantank running 2.6.23 ... rebooting into 
> > > 2.6.16.xx works fine.
> > > 
> > > that has a SH7751R with 2-way caches in write-back mode ... havent had time to 
> > Well, no luck reproducing things on SH7751R or SH7760. If you have a
> > reproduceable workload, that would really help.
> 
> Usually I let it compile GCC or other large codebases (qt-4, openssl). When
> the gcc compilejob survives (after ~48 hours) I assume the system is stable ;)
> 
On 4-way dcache I don't see any problems at least. My SH7785 has been
building various toolchains for about a week straight without any issues,
though that has been off of SATA, I have not tried alternate roots.

I also wrote an exerciser for breaking COW pages, which stresses the
kmap_coherent() path pretty well, but have likewise not hit issues there
either (on 2-way or 4-way). Looks like the next step is large builds on
2-way or direct-mapped, then.