[Pkg-xen-devel] Bug#880554: xen domu freezes with kernel linux-image-4.9.0-4-amd64
Christian Schwamborn
christian.schwamborn at nswit.de
Mon Jan 15 10:12:03 UTC 2018
Hi Hans and Valentin,
first of all: Thanks for your help and explanations, that is very
helpfull. I was on vacation last week and couldn't answer right away.
On 07.01.2018 19:36, Hans van Kranenburg wrote:
> If this is something users are going to run into while not doing more
> unusual things like having dozens of vcpus or network interfaces, then
> changing the default could prevent hours of frustration and debugging
> for them.
As a reference:
Dom0 is stretch.
0 root at zero:~# xl list
Name ID Mem VCPUs State Time(s)
Domain-0 0 1961 2 r----- 407972.8
xaver-jessie 10 2048 2 -b---- 177520.8
ustrich-jessie 12 2048 2 -b---- 8555.9
ourea-stretch 14 8192 2 -b---- 167352.7
arriba 17 4096 2 -b---- 5108.3
All DomU's have one network interface on a bridge.
xaver-jessie has 5 block devices (phys, lvm)
ustrich-jessie has 4 block devices (phys, lvm)
ourea-stretch has 16 block devices (phys, lvm)
arriba has just one (phys, lvm) and is a hvm windows system
As you can see, nothing crazy with lots of vcpus or network interfaces.
The crashing (freezing) DomU was ourea-stretch, which is the one with
the most load (smb, some web services, cal/card dav, psql, ldap,
postfix, cyrus ...). As mentioned, the freezes stopped after using the
backports kernel, nothing else changed. I was desperate at that time to
get this new installed system to work and frankly stopped all planed
updates to stretch on other systems at that point until I know what is
going on.
Is there a easy way to get/monitor the used 'grants' frames? As I
understand it, the xen-diag tool you mentioned doesn't compile in xen 4.8?
Christian
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