[CentOS-virt] Major stability problems with xen 4.6.6

Thu Aug 24 22:45:46 UTC 2017
Nathan March <nathan at gt.net>

Just in case anyone else on this list is running into similar issues, I can
confirm that the patch appears to have resolved this.

 

I've opened https://bugs.centos.org/view.php?id=13713

 

It was so bad that having the system under load (with rpmbuild) and opening
another ssh window or two would almost always cause the oops.

 

Cheers,

Nathan

 

 

From: CentOS-virt [mailto:centos-virt-bounces at centos.org] On Behalf Of
Nathan March
Sent: Wednesday, August 23, 2017 3:32 PM
To: 'Discussion about the virtualization on CentOS' <centos-virt at centos.org>
Subject: Re: [CentOS-virt] Major stability problems with xen 4.6.6

 

This appears to be a centos kernel issue rather than a xen one.

 

https://lkml.org/lkml/2016/5/17/440

 

Digging through the posts and not clear why this never made it upstream.

 

I'm going to apply that patch to my systems and see if it resolves, but
won't know for certain until a week or two of stability goes by.

 

- Nathan

 

 

From: CentOS-virt [mailto:centos-virt-bounces at centos.org] On Behalf Of
Nathan March
Sent: Wednesday, August 23, 2017 2:48 PM
To: centos-virt at centos.org <mailto:centos-virt at centos.org> 
Subject: [CentOS-virt] Major stability problems with xen 4.6.6

 

Hi,

 

I'm seeing numerous crashes on the xen 4.6.6-1 / 4.6.6-2 releases, on both
the 4.9.34-29 and 4.9.39-29 kernels.

 

I've attached a txt with two different servers outputs.

 

Xen-028: This crashed this morning while running 4.6.6-1 and 4.9.39-29

Xen-001: This crashed shortly after being upgraded to 4.6.6-2 and 4.9.34-29

 

Both are on different hardware platforms, and have had a long history of
being stable until these upgrades.

 

It sounds potentially related to
https://kernel.googlesource.com/pub/scm/linux/kernel/git/tiwai/sound-unstabl
e/+/9ce119f318ba1a07c29149301f1544b6c4bea52a%5E%21/ but I've confirmed this
patch is in the above kernels.

 

Any suggestions / thoughts?

 

Cheers,

Nathan

 

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