From: Andrew Morton <akpm@linux-foundation.org>
To: "Pádraig Brady" <P@draigBrady.com>
Cc: bert hubert <bert.hubert@netherlabs.nl>,
Rik van Riel <riel@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: userspace pagecache management tool
Date: Wed, 7 Mar 2007 10:50:35 -0800 [thread overview]
Message-ID: <20070307105035.5f5b31d4.akpm@linux-foundation.org> (raw)
In-Reply-To: <45EEA456.9020907@draigBrady.com>
On Wed, 07 Mar 2007 11:39:02 +0000 Pádraig Brady <P@draigBrady.com> wrote:
> Andrew Morton wrote:
> > On Tue, 06 Mar 2007 12:10:49 +0000
> > P__draig Brady <P@draigBrady.com> wrote:
> >> Perhaps one could possibly just evict pages with _mapcount==0 ?
> >
> > That is the present fadvise(FADV_DONTNEED) behaviour.
>
> Ah right. It doesn't invalidate page_mapped() pages.
yup
> If that means it doesn't invalidate pages previously cached
> by other processes, then great.
It will do that. This is why I point out that this userspace tool
could (easily) be enhanced to not invalidate pages which were
in pagecache prior to their being read by the managed application.
next prev parent reply other threads:[~2007-03-07 18:50 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-03 20:29 userspace pagecache management tool Andrew Morton
2007-03-03 20:40 ` Rik van Riel
2007-03-03 21:12 ` Andrew Morton
2007-03-03 21:30 ` Rik van Riel
2007-03-03 21:41 ` bert hubert
2007-03-03 22:14 ` Andrew Morton
2007-03-03 22:19 ` Rik van Riel
2007-03-03 22:26 ` Andrew Morton
2007-03-03 22:28 ` Rik van Riel
2007-03-03 22:38 ` Andrew Morton
2007-03-03 22:56 ` Erik Andersen
2007-03-03 23:01 ` bert hubert
2007-03-03 23:45 ` Andrew Morton
2007-03-06 12:10 ` Pádraig Brady
2007-03-06 21:40 ` Andrew Morton
2007-03-06 21:44 ` Rik van Riel
2007-03-07 11:39 ` Pádraig Brady
2007-03-07 18:50 ` Andrew Morton [this message]
2007-03-08 7:59 ` Vaidyanathan Srinivasan
2007-03-08 8:12 ` Andrew Morton
2007-03-03 22:07 ` Andrew Morton
2007-03-03 22:25 ` Rik van Riel
2007-03-03 22:37 ` Andrew Morton
2007-03-03 22:52 ` Andrew Morton
2007-03-04 0:01 ` Rik van Riel
2007-03-04 1:02 ` Andrew Morton
2007-03-04 1:23 ` Rik van Riel
2007-03-04 1:49 ` Andrew Morton
2007-03-04 1:56 ` Rik van Riel
2007-03-04 12:07 ` Andrew Morton
2007-03-04 14:35 ` Peter Zijlstra
2007-03-04 16:01 ` Rik van Riel
2007-03-03 22:58 ` Ray Lee
2007-03-03 23:34 ` Andrew Morton
2007-03-04 1:02 ` Ray Lee
2007-03-04 1:21 ` Andrew Morton
2007-03-04 0:14 ` Eric St-Laurent
2007-03-04 1:10 ` Andrew Morton
2007-03-04 1:39 ` Rik van Riel
2007-03-04 1:16 ` Lee Revell
2007-03-04 1:39 ` Andrew Morton
2007-03-04 2:35 ` Lee Revell
2007-03-04 4:35 ` Andrew Morton
2007-03-05 11:02 ` Pádraig Brady
2007-03-05 11:12 ` Andrew Morton
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