linux-kernel - Re: [Tux3] Tux3 report: Tux3 Git tree available

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Message-ID: <20090312135940.GB14425@parisc-linux.org>
Date:	Thu, 12 Mar 2009 07:59:40 -0600
From:	Matthew Wilcox <matthew@....cx>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	Daniel Phillips <phillips@...nq.net>,
	linux-fsdevel@...r.kernel.org, tux3@...3.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [Tux3] Tux3 report: Tux3 Git tree available

On Fri, Mar 13, 2009 at 12:04:40AM +1100, Nick Piggin wrote:
> As far as the per-block pagecache state (as opposed to the per-block fs
> state), I don't see any reason it is a problem for efficiency. We have to
> do per-page operations anyway.

Why?  Wouldn't it be nice if we could do arbitrary extents?  I suppose
superpages or soft page sizes get us most of the way there, but the
rounding or pieces at the end are a bit of a pain.  Sure, it'll be a
huge upheaval for the VM, but we're good at huge upheavals ;-)

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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