linux-kernel - RE: bug in cleancache ocfs2 hook, anybody want to try cleancache?

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Message-ID: <1311754418.2801.0.camel@menhir>
Date:	Wed, 27 Jul 2011 09:13:38 +0100
From:	Steven Whitehouse <swhiteho@...hat.com>
To:	Dan Magenheimer <dan.magenheimer@...cle.com>
Cc:	ocfs2-devel@....oracle.com, Joel Becker <jlbec@...lplan.org>,
	Sunil Mushran <sunil.mushran@...cle.com>,
	linux-kernel@...r.kernel.org
Subject: RE: bug in cleancache ocfs2 hook, anybody want to try cleancache?

Hi,

On Tue, 2011-07-26 at 07:54 -0700, Dan Magenheimer wrote:
> > > > Also, as regards your earlier question wrt a kvm backend, I may be
> > > > tempted to have a go at writing one, but I'd like to figure out what
> > > > I'm letting myself in for before making any commitment to that,
> > 
> > > I think the hardest part is updating the tmem.c module in zcache
> > > to support multiple "clients".  When I ported it from Xen, I tore
> > > all that out.  Fortunately, I've put it back in during RAMster
> > > development but those changes haven't yet seen the light of day
> > > (though I can share them offlist).
> > 
> > I'd like to try and understand the design of the existing code before I
> > consider anything more advanced such as writing a kvm backend,
> 
> FYI, the "hardest part" (support for multiple clients) is now in
> Linus's tree as of today.  With a little hypercall and glue code,
> KVM might just work now with tmem/cleancache/frontswap.
> 
> Dan
> 

Thanks for the heads up,

Steve.


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