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Message-ID: <2c0942db0707280929s56cc4588obb4abf78d766af66@mail.gmail.com> Date: Sat, 28 Jul 2007 09:29:55 -0700 From: "Ray Lee" <ray-lk@...rabbit.org> To: "Alan Cox" <alan@...rguk.ukuu.org.uk> Cc: "Rene Herman" <rene.herman@...il.com>, david@...g.hm, "Daniel Hazelton" <dhazelton@...er.net>, "Mike Galbraith" <efault@....de>, "Andrew Morton" <akpm@...ux-foundation.org>, "Ingo Molnar" <mingo@...e.hu>, "Frank Kingswood" <frank@...gswood-consulting.co.uk>, "Andi Kleen" <andi@...stfloor.org>, "Nick Piggin" <nickpiggin@...oo.com.au>, "Jesper Juhl" <jesper.juhl@...il.com>, "ck list" <ck@....kolivas.org>, "Paul Jackson" <pj@....com>, linux-mm@...ck.org, linux-kernel@...r.kernel.org Subject: Re: RFT: updatedb "morning after" problem [was: Re: -mm merge plans for 2.6.23] On 7/28/07, Alan Cox <alan@...rguk.ukuu.org.uk> wrote: > Actual physical disk ops are precious resource and anything that mostly > reduces the number will be a win - not to stay swap prefetch is the right > answer but accidentally or otherwise there are good reasons it may happen > to help. > > Bigger more linear chunks of writeout/readin is much more important I > suspect than swap prefetching. <nod>. The larger the chunks are that we swap out, the less it actually hurts to swap, which might make all this a moot point. Not all I/O is created equal... Ray - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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