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Message-Id: <20080728160904.f644fb85.akpm@linux-foundation.org> Date: Mon, 28 Jul 2008 16:09:04 -0700 From: Andrew Morton <akpm@...ux-foundation.org> To: Christoph Hellwig <hch@...radead.org> Cc: torvalds@...ux-foundation.org, hifumi.hisashi@....ntt.co.jp, hch@...radead.org, jack@....cz, linux-ext4@...r.kernel.org, nickpiggin@...oo.com.au Subject: Re: [patch 12/17] vfs: pagecache usage optimization for pagesize!=blocksize On Mon, 28 Jul 2008 19:00:32 -0400 Christoph Hellwig <hch@...radead.org> wrote: > On Mon, Jul 28, 2008 at 03:46:36PM -0700, akpm@...ux-foundation.org wrote: > > From: Hisashi Hifumi <hifumi.hisashi@....ntt.co.jp> > > > > When we read some part of a file through pagecache, if there is a > > pagecache of corresponding index but this page is not uptodate, read IO is > > issued and this page will be uptodate. > > I was under the impression we wanted to do this in a nicer way than > the hacky method? The only description I've seen of "a nicer way" is vague two-word descriptions of "changing readpage". Or something. No indication of what those changes are, nor who will implement them nor when. That just isn't solid enough to block a change which has significant performance benefits. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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