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

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Date:	Sun, 26 Jul 2009 18:00:38 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Anthony Liguori <anthony@...emonkey.ws>
CC:	Chris Mason <chris.mason@...cle.com>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org,
	npiggin@...e.de, akpm@...l.org, jeremy@...p.org,
	xen-devel@...ts.xensource.com, tmem-devel@....oracle.com,
	alan@...rguk.ukuu.org.uk, linux-mm@...ck.org,
	kurt.hackel@...cle.com, Rusty Russell <rusty@...tcorp.com.au>,
	dave.mccracken@...cle.com, Marcelo Tosatti <mtosatti@...hat.com>,
	sunil.mushran@...cle.com, Schwidefsky <schwidefsky@...ibm.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>
Subject: Re: [RFC PATCH 0/4] (Take 2): transcendent memory ("tmem") for Linux

On 07/14/2009 12:17 AM, Anthony Liguori wrote:
> Chris Mason wrote:
>> On Mon, Jul 13, 2009 at 03:38:45PM -0500, Anthony Liguori wrote:
>>   I'll definitely grant that caching with writethough adds more caching,
>> but it does need trim support before it is similar to tmem.
>
> I think trim is somewhat orthogonal but even if you do need it, the 
> nice thing about implementing ATA trim support verses a 
> paravirtualization is that it works with a wide variety of guests.
>
> From the perspective of the VMM, it seems like a good thing.

trim is also lovely in that images will no longer grow monotonously even 
though guest disk usage is constant or is even reduced.

-- 
error compiling committee.c: too many arguments to function

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