Re: Another preempt folding issue?

From: Borislav Petkov
Date: Wed Feb 12 2014 - 05:40:35 EST


On Wed, Feb 12, 2014 at 11:37:13AM +0100, Peter Zijlstra wrote:
> > Another reporter also saw this on an AMD and said it could not be reproduced on
> > the same hardware and the same software versions when using 64bit instead of 32.
> >
> > In my case on a 32bit installation I will see this on every invocation of
>
> Curious.. so its both AMD and Intel.
>
> That makes funny hardware less likely... but how can the vmexit loose an
> interrupt like this.

Also what I'm wondering about and what's not clear from Stefan's reply
is whether this is purely a 32-bit issue, i.e. a 32-bit host running a
64-bit qemu running a 32-bit iso or what is it?

Or do we have reports for both 32-bit and 64-bit hosts?

Thanks.

--
Regards/Gruss,
Boris.

Sent from a fat crate under my desk. Formatting is fine.
--
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/