From: Andrew Morton <akpm@linux-foundation.org>
To: Johannes Weiner <hannes@saeurebad.de>
Cc: npiggin@suse.de, riel@redhat.com, kosaki.motohiro@jp.fujitsu.com,
linux-mm@kvack.org
Subject: Re: [patch] mm: more likely reclaim MADV_SEQUENTIAL mappings II
Date: Tue, 21 Oct 2008 15:13:42 -0700 [thread overview]
Message-ID: <20081021151342.c1678bd6.akpm@linux-foundation.org> (raw)
In-Reply-To: <878wsigp2e.fsf_-_@saeurebad.de>
On Tue, 21 Oct 2008 13:33:45 +0200
Johannes Weiner <hannes@saeurebad.de> wrote:
> File pages mapped only in sequentially read mappings are perfect
> reclaim canditates.
>
> This makes MADV_SEQUENTIAL mappings behave like a weak references,
> their pages will be reclaimed unless they have a strong reference from
> a normal mapping as well.
>
> The patch changes the reclaim and the unmap path where they check if
> the page has been referenced. In both cases, accesses through
> sequentially read mappings will be ignored.
>
> Signed-off-by: Johannes Weiner <hannes@saeurebad.de>
> ---
> II: add likely()s to mitigate the extra branches a bit as to Nick's
> suggestion
Is http://hannes.saeurebad.de/madvseq/ still true with this version?
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next prev parent reply other threads:[~2008-10-21 22:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-21 10:32 [rfc] mm: more likely reclaim MADV_SEQUENTIAL mappings Johannes Weiner
2008-10-21 10:43 ` Nick Piggin
2008-10-21 11:33 ` [patch] mm: more likely reclaim MADV_SEQUENTIAL mappings II Johannes Weiner
2008-10-21 22:13 ` Andrew Morton [this message]
2008-10-22 0:09 ` Johannes Weiner
2008-10-22 0:51 ` Johannes Weiner
2008-10-22 6:39 ` KOSAKI Motohiro
2008-10-22 7:15 ` Johannes Weiner
2008-10-22 7:41 ` Andrew Morton
2008-10-24 0:21 ` Johannes Weiner
2008-10-24 12:55 ` KOSAKI Motohiro
2008-10-24 14:02 ` Johannes Weiner
2008-10-24 14:31 ` Rik van Riel
2008-10-24 16:15 ` Johannes Weiner
2008-10-24 23:48 ` Johannes Weiner
2008-10-24 18:59 ` KOSAKI Motohiro
2008-10-21 14:40 ` [rfc] mm: more likely reclaim MADV_SEQUENTIAL mappings Rik van Riel
2008-10-21 15:20 ` Johannes Weiner
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