linux-kernel - Re: [GIT PULL] mm: frontswap (for 3.2 window)

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Message-Id: <20111103175410.b15efb8c.akpm@linux-foundation.org>
Date:	Thu, 3 Nov 2011 17:54:10 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Jan Beulich" <JBeulich@...e.com>
Cc:	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Dan Magenheimer" <dan.magenheimer@...cle.com>,
	"Neo Jia" <cyclonusj@...il.com>, <levinsasha928@...il.com>,
	"JeremyFitzhardinge" <jeremy@...p.org>, <linux-mm@...ck.org>,
	"Dave Hansen" <dave@...ux.vnet.ibm.com>,
	"Seth Jennings" <sjenning@...ux.vnet.ibm.com>,
	"Jonathan Corbet" <corbet@....net>,
	"Chris Mason" <chris.mason@...cle.com>,
	"Konrad Wilk" <konrad.wilk@...cle.com>, <ngupta@...are.org>,
	"LKML" <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] mm: frontswap (for 3.2 window)

On Thu, 03 Nov 2011 16:49:27 +0000 "Jan Beulich" <JBeulich@...e.com> wrote:

> >>> On 27.10.11 at 20:52, Dan Magenheimer <dan.magenheimer@...cle.com> wrote:
> > Hi Linus --
> > 
> > Frontswap now has FOUR users: Two already merged in-tree (zcache
> > and Xen) and two still in development but in public git trees
> > (RAMster and KVM).  Frontswap is part 2 of 2 of the core kernel
> > changes required to support transcendent memory; part 1 was cleancache
> > which you merged at 3.0 (and which now has FIVE users).
> > 
> > Frontswap patches have been in linux-next since June 3 (with zero
> > changes since Sep 22).  First posted to lkml in June 2009, frontswap 
> > is now at version 11 and has incorporated feedback from a wide range
> > of kernel developers.  For a good overview, see
> >    http://lwn.net/Articles/454795.
> > If further rationale is needed, please see the end of this email
> > for more info.
> > 
> > SO... Please pull:
> > 
> > git://oss.oracle.com/git/djm/tmem.git #tmem
> > 
> >...
> > Linux kernel distros incorporating frontswap:
> > - Oracle UEK 2.6.39 Beta:
> >    http://oss.oracle.com/git/?p=linux-2.6-unbreakable-beta.git;a=summary 
> > - OpenSuSE since 11.2 (2009) [see mm/tmem-xen.c]
> >    http://kernel.opensuse.org/cgit/kernel/ 
> 
> I've been away so I am too far behind to read this entire
> very long thread, but wanted to confirm that we've been
> carrying an earlier version of this code as indicated above
> and it would simplify our kernel maintenance if frontswap
> got merged.  So please count me as supporting frontswap.

Are you able to tell use *why* you're carrying it, and what benefit it
is providing to your users?

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