*** This bug is a duplicate of bug 1346917 ***
https://bugs.launchpad.net/bugs/1346917
** This bug has been marked a duplicate of bug 1346917
Using KSM on NUMA capable machines can cause KVM guest performance and
stability issues
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Hey guys!
I'm pretty sure that the following patch will fix your problems:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1346917
New kernel for Trusty: http://people.canonical.com/~arges/lp1346917/
My original BUG:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1338277
Cheers!
Thia
After updating a server 12.04. LTS including the new HWE stack support I've got
the same problems.
The guest (MS Server 2012R2) was running after startup for about 7 to 10 min
without problems, after this period the cpu utilisation for the kvm process
increases more an more, the guest became slu
I have 5 KVM servers here all running 14.04 - 2 weeks ago one host
started to act up with VM's crashing - then this week another host was
suffering from terrible internal network delays (bridged NIC) -
rebooting the hosts and guests did nothing to resolve the issue -
disabling KSM seems to have com
It was just a day ago.
I have to wait until the weekend, when the server becomes somewhat idle and I
can do such tests.
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https://bugs.launchpad.net/bugs/1341195
Title:
KVM guests getti
Was anyone able to test the fix proposed by Chris Arges in comment #12?
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Title:
KVM guests getting slow by time
To manage notifications about th
Marking incomplete until requested testing is complete.
** Changed in: linux (Ubuntu)
Importance: Undecided => High
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Title:
KVM guests gettin
I believe I've found the fix for this issue for 3.13.
If you can, please test the kernel posted on comment #1 on this bug:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1346917
Make sure KSM is enabled; and any workarounds for this bug are disabled.
If this fixes the issue for you, you are
I think we can be sure, that KSM_ENABLED=0 definitely helps.
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Title:
KVM guests getting slow by time
To manage notifications about this bug go t
** Tags added: ksm-numa-guest-perf
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Title:
KVM guests getting slow by time
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FYI, I see no issue since I set KSM_ENABLED=0 (1 day).
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Title:
KVM guests getting slow by time
To manage notifications about this bug go to:
htt
On 07/16/2014 10:24 PM, Serge Hallyn wrote:
> (To be sure - /sys/kernel/mm/ksm/run is in fact set to 0 now right?)
Right.
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Title:
KVM guests ge
Quoting Tamas Papp (1341...@bugs.launchpad.net):
> On 07/16/2014 09:39 PM, Serge Hallyn wrote
> > I've personally not seen it, and noone on my team, who use a lot of
> > kvm instances, has seen it. Our two current theories are that (a) it
> > has to do with ksm page migration across numa-nodes, or
On 07/16/2014 09:39 PM, Serge Hallyn wrote
> I've personally not seen it, and noone on my team, who use a lot of
> kvm instances, has seen it. Our two current theories are that (a) it
> has to do with ksm page migration across numa-nodes, or (b) it has to
> do with a race with transparent hugepage
Quoting Tamas Papp (1341...@bugs.launchpad.net):
> On 07/16/2014 06:35 PM, Serge Hallyn wrote:
>
>
> > To be clear, you have not yet gotten the bug since you've set
> > KSM_ENABLED to 0, or have you?
>
> I just did it, so no, not yet.
>
> This happened by time:
>
> Saucy (everything is fine) -
On 07/16/2014 06:35 PM, Serge Hallyn wrote:
> To be clear, you have not yet gotten the bug since you've set
> KSM_ENABLED to 0, or have you?
I just did it, so no, not yet.
This happened by time:
Saucy (everything is fine) -> Trusty (issue happened) -> Trusty with
Saucy kernel 3 weeks ago (no
Hi Tamas,
To be clear, you have not yet gotten the bug since you've set
KSM_ENABLED to 0, or have you?
Interesting about the saucy kernel. Ideally we could reproduce this
reliably enough to really bisect.
I wonder if we can reproduce without qemu.
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On 07/14/2014 05:13 PM, Serge Hallyn wrote:
> Since "switching to saucy kernel is a good workaround", marking this as
> affecting the kernel.
>
> Could you try disabling KSM and see if that avoids the issue?
I set KSM_ENABLED=0 in /etc/default/qemu-kvm and restarted the server.
Also today after 3
Since "switching to saucy kernel is a good workaround", marking this as
affecting the kernel.
Could you try disabling KSM and see if that avoids the issue?
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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