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

[Jeff Rizzo <riz%netbsd.org@localhost>]

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

From: Jeff Rizzo <riz%netbsd.org@localhost>
To: Manuel Bouyer <bouyer%antioche.eu.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: Sun, 19 Feb 2012 09:18:31 -0800

 On 2/18/12 10:27 AM, Manuel Bouyer wrote:
 > 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 ?
 >
 
 I have seen everything from 3.0 to 3.4;  most usually 3.4.
 
 +j