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

To: Anthony Liguori <anthony@xxxxxxxxxxxxx>
Subject: [Xen-devel] Re: [RFC PATCH 0/4] (Take 2): transcendent memory ("tmem") for Linux
From: Avi Kivity <avi@xxxxxxxxxx>
Date: Sun, 26 Jul 2009 18:00:38 +0300
Cc: npiggin@xxxxxxx, akpm@xxxxxxxx, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, tmem-devel@xxxxxxxxxxxxxx, kurt.hackel@xxxxxxxxxx, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, sunil.mushran@xxxxxxxxxx, alan@xxxxxxxxxxxxxxxxxxx, jeremy@xxxxxxxx, Schwidefsky <schwidefsky@xxxxxxxxxx>, dave.mccracken@xxxxxxxxxx, Marcelo Tosatti <mtosatti@xxxxxxxxxx>, Chris Mason <chris.mason@xxxxxxxxxx>, Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
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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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