On 02/03/2010 11:11 PM, Rik van Riel wrote:
Currently KVM pretends that pages with EPT mappings never got
accessed. This has some side effects in the VM, like swapping
out actively used guest pages and needlessly breaking up actively
used hugepages.
We can avoid those very costly side effects
On Fri, Feb 05, 2010 at 07:14:13PM +0100, Andrea Arcangeli wrote:
On Fri, Feb 05, 2010 at 03:34:23PM -0200, Marcelo Tosatti wrote:
But perhaps a module parameter to turn accessed bit emulation off might
be handy in the future?
Maybe, but somebody should show that this can overall become a
On Thu, Feb 04, 2010 at 06:47:15PM +0100, Andrea Arcangeli wrote:
On Thu, Feb 04, 2010 at 08:40:43AM -0500, Rik van Riel wrote:
I suspect it won't be very many. I have been monitoring
/proc/meminfo on my system while testing this patch, and
it is quite typical that the size of the inactive
On Fri, Feb 05, 2010 at 03:34:23PM -0200, Marcelo Tosatti wrote:
But perhaps a module parameter to turn accessed bit emulation off might
be handy in the future?
Maybe, but somebody should show that this can overall become a
downside, which I doubt... I think if it does, the VM is to blame for
On 02/03/2010 11:12 PM, Balbir Singh wrote:
* Rik van Rielr...@redhat.com [2010-02-03 16:11:03]:
Currently KVM pretends that pages with EPT mappings never got
accessed. This has some side effects in the VM, like swapping
out actively used guest pages and needlessly breaking up actively
used
* Rik van Riel r...@redhat.com [2010-02-04 08:40:43]:
On 02/03/2010 11:12 PM, Balbir Singh wrote:
* Rik van Rielr...@redhat.com [2010-02-03 16:11:03]:
Currently KVM pretends that pages with EPT mappings never got
accessed. This has some side effects in the VM, like swapping
out actively
Balbir Singh wrote:
* Rik van Riel r...@redhat.com [2010-02-04 08:40:43]:
On 02/03/2010 11:12 PM, Balbir Singh wrote:
* Rik van Rielr...@redhat.com [2010-02-03 16:11:03]:
Currently KVM pretends that pages with EPT mappings never got
accessed. This has some side effects in the VM, like
On Wed, Feb 03, 2010 at 04:11:03PM -0500, Rik van Riel wrote:
Jeff, does this patch fix the issue you saw a few months ago, with
a 256MB KVM guest in a cgroup limited to 128GB memory?
Hum, let me dust off that workload and give it a shot...
Jeff
--
To
On Thu, Feb 04, 2010 at 08:40:43AM -0500, Rik van Riel wrote:
I suspect it won't be very many. I have been monitoring
/proc/meminfo on my system while testing this patch, and
it is quite typical that the size of the inactive anon
list does not change for minutes at a time.
In other words,
* Rik van Riel r...@redhat.com [2010-02-03 16:11:03]:
Currently KVM pretends that pages with EPT mappings never got
accessed. This has some side effects in the VM, like swapping
out actively used guest pages and needlessly breaking up actively
used hugepages.
We can avoid those very
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