linux-kernel - Re: swap storage alignment and stride size

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Message-ID: <yq1d3p486qe.fsf@sermon.lab.mkp.net>
Date:	Tue, 14 Dec 2010 15:00:41 -0500
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	Ric Wheeler <ricwheeler@...il.com>
Cc:	Christian Brandt <brandtc@...5.com>, linux-kernel@...r.kernel.org,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Mike Snitzer <snitzer@...hat.com>,
	Hugh Dickins <hughd@...gle.com>
Subject: Re: swap storage alignment and stride size

>>>>> "Ric" == Ric Wheeler <ricwheeler@...il.com> writes:

Sorry, I've been away for a couple of weeks.

Ric> There has been a lot of work on alignment, Martin Petersen lead
Ric> most of that and is probably the best one to ping.

With modern tooling we should align the partition or DM device correctly
so the swap starts on a properly aligned boundary. But I don't think
anybody has looked into hooking the swap stuff up with the I/O
topology. I'm also not sure the swap code is flexible enough to deal
with units that are bigger than page size.

Hugh?

-- 
Martin K. Petersen	Oracle Linux Engineering
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