Re: Frontswap [PATCH 0/4] (was Transcendent Memory): overview

[Avi Kivity]

On 04/29/2010 09:59 PM, Avi Kivity wrote:
> I'm convinced it's useful.  The API is so close to a block device 
> (read/write with key/value vs read/write with sector/value) that we 
> should make the effort not to introduce a new API.

Plus of course the asynchronity and batching of the block layer.  Even 
if you don't use a dma engine, you improve performance by exiting one 
per several dozen pages instead of for every page, perhaps enough to 
allow the hypervisor to justify copying the memory with non-temporal moves.

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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