Re: [Xen-users] Transcendent Memory ("tmem") -capable kernel now publicly released

[Phillip Susi <psusi@xxxxxxxxxx>]

On 4/16/2012 12:40 PM, Dan Magenheimer wrote:
> Hi Psusi (Phillip?) - Just saw your tmem post... sorry I don't keep
> up with xen-users.   If you are looking at implementing Xen tmem
> support on/for a future Ubuntu release, let me know if I can help and
> see:
> http://oss.oracle.com/git/?p=linux-2.6-unbreakable.git;a=summary
The last time I played with it I think I managed to get it working after 
adding the "tmem" command line arguments to xen and the guest kernel. 
What I have not been able to do is figure out how to monitor its 
usage/effectiveness.  The output of xm tmem was completely 
indecipherable.  Could you shed some light on that?
Also I was wondering about how pages move back and forth between 
cleancache and pagecache.  Are they copied or moved back and forth?  In 
other words, is the data placed in cleancache only once the local 
pagecache discards it, or as soon as it is read from disk, and when it 
is later requested, is it copied back from cleancache to the local 
pagecache, thus resulting in the data being duplicated in memory, once 
for the guest, and once in tmem?

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
http://lists.xen.org/xen-users