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Message-ID: <20080717102148.6bc52e94@cuia.bos.redhat.com> Date: Thu, 17 Jul 2008 10:21:48 -0400 From: Rik van Riel <riel@...hat.com> To: Nick Piggin <nickpiggin@...oo.com.au> Cc: Eric Rannaud <eric.rannaud@...il.com>, Chris Snook <csnook@...hat.com>, Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org, linux-mm <linux-mm@...ck.org>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: madvise(2) MADV_SEQUENTIAL behavior On Thu, 17 Jul 2008 16:14:29 +1000 Nick Piggin <nickpiggin@...oo.com.au> wrote: > > It might encourage user space applications to start using > > FADV_SEQUENTIAL or FADV_NOREUSE more often (as it would become > > worthwhile to do so), and if they do (especially cron jobs), the problem > > of the slow desktop in the morning would progressively solve itself. > > The slow desktop in the morning should not happen even without such a > call, because the kernel should not throw out frequently used data (even > if it is not quite so recent) in favour of streaming data. > > OK, I figure it doesn't do such a good job now, which is sad, Do you have any tests in mind that we could use to decide whether the patch I posted Tuesday would do a decent job at protecting frequently used data from streaming data? http://lkml.org/lkml/2008/7/15/465 -- All Rights Reversed -- 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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