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

Avi Kivity
2009-07-12T20:43:54Z

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.

--
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