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

[Avi Kivity]

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.