Re: [Xen-devel] Re: [RFC PATCH 0/4] (Take 2): transcendent memory ("tmem") for Linux

[Avi Kivity <avi@xxxxxxxxxx>]

On 07/12/2009 11:39 PM, Dan Magenheimer wrote:
> > Right, the transient uses of tmem when applied to disk objects
> > (swap/pagecache) are very similar to disk caches.  Which is
> > why you can
> > get a very similar effect when caching your virtual disks;
> > this can be
> > done without any guest modification.
> >      
> Write-through backing and virtual disk cacheing offer a
> similar effect, but it is far from the same.
>    
Can you explain how it differs for the swap case?  Maybe I don't 
understand how tmem preswap works.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.


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