netdev - Re: [0/4] DST: Distributed storage.

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Message-ID: <20071204172146.GA21838@2ka.mipt.ru>
Date:	Tue, 4 Dec 2007 20:21:47 +0300
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Mike Snitzer <snitzer@...il.com>,
	lkml <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [0/4] DST: Distributed storage.

On Tue, Dec 04, 2007 at 04:56:26PM +0000, Christoph Hellwig (hch@...radead.org) wrote:
> > >  * fixed bug with XFS metadata update (it can provide slab pages to the
> > >         DST, so it is not allowed to transfer them using ->sendpage())
> 
> xfs hasn't been doing that anymore for quite a while.  Block drivers
> don't need hacks for it anymore, epsecially as it's not reliably
> detectable.

I use 2.6.22 and it is there, maybe it was changed later.
Right now it can be detected quite trivially, but can result in a little
more bio startup overhead, I just did not know that it was allowed and
thus did not have a check in the DST.

-- 
	Evgeniy Polyakov
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