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@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
