From: "Pádraig Brady" <P@draigBrady.com>
To: Andrew Morton <akpm@linux-foundation.org>
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, 07 Mar 2007 11:39:02 +0000 [thread overview]
Message-ID: <45EEA456.9020907@draigBrady.com> (raw)
In-Reply-To: <20070306134046.5be821f5.akpm@linux-foundation.org>
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.
If that means it doesn't invalidate pages previously cached
by other processes, then great.
However I think what I meant though was fadvise(FADV_DONTNEED)
should only invalidate pages where page_count()<=1
>From include/linux/mm.h
" For pages belonging to inodes, the page_count() is the number of
attaches, plus 1 if `private' contains something, plus one for
the page cache itself."
cheers,
Pádraig.
next prev parent reply other threads:[~2007-03-07 11:41 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 [this message]
2007-03-07 18:50 ` Andrew Morton
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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