From: Lee Revell <rlrevell@joe-job.com>
To: Rob Landley <rob@landley.net>
Cc: Andrew Morton <akpm@osdl.org>,
Dirk Henning Gerdes <mail@dirk-gerdes.de>,
axboe@suse.de, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/4] linux-2.6-block: deactivating pagecache for benchmarks
Date: Mon, 05 Dec 2005 11:20:40 -0500 [thread overview]
Message-ID: <1133799641.21641.14.camel@mindpipe> (raw)
In-Reply-To: <200512042013.13214.rob@landley.net>
On Sun, 2005-12-04 at 20:13 -0600, Rob Landley wrote:
> > Add /proc/sys/vm/drop-pagecache. When written to, this will cause the
> > kernel to discard as much pagecache and reclaimable slab objects as it can.
> >
> > It won't drop dirty data, so the user should run `sync' first.
>
> This is deeply, deeply cool.
>
> > Caveats:
> >
> > a) Holds inode_lock for exorbitant amounts of time.
>
> Voluntary preemption point, maybe?
I thin it's a bad idea, that would just encourage people to use this for
anything other than debugging. If you care about latency don't discard
the page cache.
The GNOME people have been asking for this for a while, in order to
improve startup times, they would like a way to simulate a cold start
without rebooting.
Lee
next prev parent reply other threads:[~2005-12-05 16:20 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-01 13:17 [PATCH 0/4] linux-2.6-block: deactivating pagecache for benchmarks Dirk Henning Gerdes
2005-12-01 13:29 ` Arjan van de Ven
2005-12-01 13:43 ` Dirk Henning Gerdes
2005-12-01 14:36 ` Jens Axboe
2005-12-02 1:25 ` Andrew Morton
2005-12-02 1:34 ` Jeff Garzik
2005-12-02 19:19 ` Badari Pulavarty
2005-12-02 19:17 ` Badari Pulavarty
2005-12-02 21:24 ` Badari Pulavarty
2005-12-02 21:44 ` Andrew Morton
2005-12-02 22:33 ` Badari Pulavarty
2005-12-05 2:13 ` Rob Landley
2005-12-05 16:20 ` Lee Revell [this message]
2005-12-05 17:28 ` Rob Landley
2005-12-05 16:54 ` Badari Pulavarty
[not found] <5f08L-Um-413@gated-at.bofh.it>
2005-12-01 22:48 ` Bodo Eggert
[not found] ` <5f7UE-3FH-13@gated-at.bofh.it>
2005-12-03 2:05 ` Bodo Eggert
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