This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


RE: [Xen-devel] [PATCH] xen mmu: fix a race window causing leave_mm BUG(

On Wed, 2011-05-11 at 02:20 +0100, Tian, Kevin wrote:
> > From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@xxxxxxxxxx]
> > Sent: Wednesday, May 11, 2011 4:27 AM
> > 
> > On Fri, Apr 29, 2011 at 12:10:57PM +0800, Tian, Kevin wrote:
> > >     xen mmu: fix a race window causing leave_mm BUG()
> > 
> > I've this in mailbox and I am wondering whether this still an issue with the
> > 2.6.39 type kernels?
> > How do you reproduce the failure? When using LVM?
> this issue is reported by Xiaoyun when he did extensive test which happened
> occasionally after dozen of hours running. From the phenomenon and info
> provided by Xiaoyun, I found this potential race window and Xiaoyun has
> verified this patch solving his stability issue.
> the original thread is at:
> http://lists.xensource.com/archives/html/xen-devel/2011-04/msg01186.html
> his kernel is based on 2.6.38, and I checked latest 2.6.39 from your 
> maintained
> repo, and same issue still exists.
> btw, I didn't reproduce it myself, and not sure whether Xiaoyun uses LVM. But
> I think it has nothing to do with storage type, and a pure mmu design issue.

Is there a specific stack trace (or two) which is associated with this
bug? I'm wondering if http://bugs.debian.org/613073 might be the same


Xen-devel mailing list