From: Andrew Morton <akpm@linux-foundation.org>
To: "Lee Revell" <rlrevell@joe-job.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: userspace pagecache management tool
Date: Sat, 3 Mar 2007 20:35:56 -0800 [thread overview]
Message-ID: <20070303203556.8648c9a2.akpm@linux-foundation.org> (raw)
In-Reply-To: <75b66ecd0703031835j5ff2846fpd4761a89f67fc2f1@mail.gmail.com>
On Sat, 3 Mar 2007 21:35:59 -0500 "Lee Revell" <rlrevell@joe-job.com> wrote:
> On 3/3/07, Andrew Morton <akpm@linux-foundation.org> wrote:
> > But yes, updatedb's pagecache usage will be mainly metadata, and this tool
> > doesn't address metadata pagecache, although it could do so.
> >
>
> With no kernel changes? How? I can't find an equivalent API to
> posix_fadvise() for metadata.
>
We can use mincore and fadvise against /dev/sda1, too.
mincore's linear search would hurt but you could just run fadvise
regularly. A lot of the blockdev pagecache is pretty useless anyway: we've
already copied it much of it into dentries and inodes, and some of ext2/3/4's
pagecache is already pinned by the fs.
next prev parent reply other threads:[~2007-03-04 4:36 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
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 [this message]
2007-03-05 11:02 ` Pádraig Brady
2007-03-05 11:12 ` Andrew Morton
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