KSM proxmox 2.6.35

[naturlight]

Hello
I run under kernel 2.6.35 with KSM support

I read http://pve.proxmox.com/wiki/KSM but i already have 0 page sharing
Does i have to add something in /etc/sysctl.conf to make it working ?

Regards,

 

[tom]

works out of the box. but how do you test? you need run some KVM guest, especially windows. and use more than 50 % ram from your host.

e.g. if your Proxmox VE host got 8 GB RAM, just start three Windows guests with 2 GB ram assigned.

 

[naturlight]

Ok i will try with host 24Go DDR3 and 5-6 vm windows ..
I will send you my feedback tomorrow

I read there is a way to stop and start the KSM support with sysctl but i don't remember how.

Regards

 

[tom]

I just did some tests here, looks like something is not working, I take a deeper look.

 

[naturlight]

Hum not working on my proxmox

root@vd1:~# uname -r
2.6.35-1-pve

root@vd1:~# free -m
total used free shared buffers cached
Mem: 24105 12210 11894 0 35 238
-/+ buffers/cache: 11937 12168
Swap: 39997 0 39997

watch cat /sys/kernel/mm/ksm/pages_shared
Every 2,0s: cat /sys/kernel/mm/ksm/pages_shared Wed Apr 6 01:22:17 2011

0

 

[naturlight]

Hello,
Did you find why KSM don't work ? i already have 0 pages shared

 

[yves.menge]

Hello together, i'm also interested in solving this issue! Hope you'll find the failure in the near future

 

[tom]

We just uploaded a fix (pve-qemu-kvm: 0.14.0-3).

After upgrading you need to stop your KVM guests and start again, pls test and give feedback.

 

[yves.menge]

Hi tom

i've upgraded to the lates version you've uploaded and after a few minutes it seems that KSM is working again!

<--
Every 2.0s: cat /sys/kernel/mm/ksm/pages_sharing Thu Apr 7 09:00:18 2011

427221
<--

It runs quite stable at the moment but it's a bit to early for a "real stability statement"

 

[holgihero]

*** Ok forget all about my post. I'm running kernel 2.6.32 and as i understand, there is KSm not enabled... ***

While following your thread I checked my own installation and found ksm not running at all.
There is no /sys/kernel/mm/ksm/ dir and therefore /etc/init.d/ksmtuned is not starting (the script checks for that dir).
/etc/default/ksmtuned says start=yes

Is there another screw to turn?

Regards Holgi