From: MOLNAR Ingo <mingo@valerie.inf.elte.hu>
To: Rik van Riel <H.H.vanRiel@phys.uu.nl>
Cc: Andrea Arcangeli <arcangeli@mbox.queen.it>,
Linux MM <linux-mm@kvack.org>,
Linux Kernel <linux-kernel@vger.rutgers.edu>
Subject: Re: cp file /dev/zero <-> cache [was Re: increasing page size]
Date: Sun, 5 Jul 1998 20:57:59 +0200 (MET DST) [thread overview]
Message-ID: <Pine.GSO.3.96.980705204753.20176A-100000@valerie.inf.elte.hu> (raw)
In-Reply-To: <Pine.LNX.3.96.980705185219.1574D-100000@mirkwood.dummy.home>
On Sun, 5 Jul 1998, Rik van Riel wrote:
> > I run hdparm -a0 /dev/hda and nothing change. Now the cache take 20Mbyte
> > of memory running cp file /dev/null while memtest 10000000 is running.
>
> Hdparm only affects _hardware_ readahead and has nothing
> to do with software readahead.
nope, -a0 turns off software readahead. -A controls hardware readahead.
-- mingo
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next prev parent reply other threads:[~1998-07-05 18:58 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.3.96.980705072829.17879D-100000@mirkwood.dummy.home>
1998-07-05 11:32 ` Andrea Arcangeli
1998-07-05 17:00 ` Rik van Riel
1998-07-05 18:38 ` Andrea Arcangeli
1998-07-05 19:31 ` Rik van Riel
1998-07-06 10:38 ` Stephen C. Tweedie
1998-07-06 11:42 ` Rik van Riel
1998-07-06 14:20 ` Andrea Arcangeli
1998-07-06 10:31 ` Stephen C. Tweedie
1998-07-06 12:34 ` Andrea Arcangeli
1998-07-06 14:36 ` Stephen C. Tweedie
1998-07-06 19:28 ` Andrea Arcangeli
1998-07-07 12:01 ` Stephen C. Tweedie
1998-07-07 15:54 ` Rik van Riel
1998-07-07 17:32 ` Benjamin C.R. LaHaise
1998-07-08 13:54 ` Stephen C. Tweedie
1998-07-08 21:19 ` Andrea Arcangeli
1998-07-11 11:18 ` Rik van Riel
1998-07-11 21:11 ` Stephen C. Tweedie
1998-07-08 13:45 ` Stephen C. Tweedie
1998-07-08 18:57 ` Rik van Riel
1998-07-08 22:11 ` Stephen C. Tweedie
1998-07-09 7:43 ` Rik van Riel
1998-07-09 20:39 ` Rik van Riel
1998-07-13 11:54 ` Stephen C. Tweedie
1998-07-05 18:57 ` MOLNAR Ingo [this message]
1998-07-06 10:24 ` Stephen C. Tweedie
1998-07-06 13:37 ` Eric W. Biederman
1998-07-07 12:35 ` Stephen C. Tweedie
1998-07-09 13:01 Zachary Amsden
[not found] <199807091442.PAA01020@dax.dcs.ed.ac.uk>
1998-07-09 18:59 ` Rik van Riel
1998-07-09 23:37 ` Stephen C. Tweedie
1998-07-10 5:57 ` Rik van Riel
1998-07-11 14:14 ` Rik van Riel
1998-07-11 21:23 ` Stephen C. Tweedie
1998-07-11 22:25 ` Rik van Riel
1998-07-13 13:23 ` Stephen C. Tweedie
1998-07-12 1:47 ` Benjamin C.R. LaHaise
1998-07-13 13:42 ` Stephen C. Tweedie
1998-07-18 22:10 ` Rik van Riel
1998-07-20 16:04 ` Stephen C. Tweedie
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