Re: port-xen/45975 (panic: HYPERVISOR_mmu_update failed, ret: -22 during heavy activity)

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

The following reply was made to PR port-xen/45975; it has been noted by GNATS.

From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: Jeff Rizzo <riz%netbsd.org@localhost>
Cc: gnats-bugs%netbsd.org@localhost, Greg Oster <oster%cs.usask.ca@localhost>
Subject: Re: port-xen/45975 (panic: HYPERVISOR_mmu_update failed, ret: -22
 during heavy activity)
Date: Sat, 18 Feb 2012 19:27:56 +0100

 On Sat, Feb 18, 2012 at 09:33:36AM -0800, Jeff Rizzo wrote:
 > On 2/17/12 9:30 AM, Greg Oster wrote:
 > >  With this patch I was able to do a successful 'build.sh -j8' build on an
 > >  amd64 DOMU that was previously failing.
 > >
 > >
 > 
 > With the second patch (and the first), things are definitely _more_
 > stable, though I still get crashes (with, unfortunately, no
 > backtrace info, because the console is garbled) doing a -j 16/-j 24
 > build on an 8-vcpu amazon EC2 instance.  On another dom0 where I was
 > seeing this particular problem, it seems to be gone.
 
 Do you know the hypervisor version on amazon EC2 ?
 We have fixed a few Xen bugs related to PDP recursive mappings;
 AKAIF they've been integrated upstream but maybe amazon don't have them
 all ?
 
 -- 
 Manuel Bouyer <bouyer%antioche.eu.org@localhost>
      NetBSD: 26 ans d'experience feront toujours la difference
 --