From: "Stephen C. Tweedie" <sct@redhat.com>
To: ebiederm+eric@npwt.net
Cc: "Stephen C. Tweedie" <sct@redhat.com>,
Zlatko Calusic <Zlatko.Calusic@CARNet.hr>,
linux-mm@kvack.org
Subject: Re: More info: 2.1.108 page cache performance on low memory
Date: Mon, 17 Aug 1998 14:57:16 +0100 [thread overview]
Message-ID: <199808171357.OAA02998@dax.dcs.ed.ac.uk> (raw)
In-Reply-To: <Pine.LNX.4.02.9808020002110.424-100000@iddi.npwt.net>
Hi,
Sorry, I'm just back from 2 weeks on holiday.
On Sun, 2 Aug 1998 00:19:52 -0500 (CDT), Eric W Biederman
<eric@flinx.npwt.net> said:
>> We *need* a mechanism which is block-aligned, not page-aligned. The
>> buffer cache is a good way of doing it. Forcing block device caching
>> into a page-aligned cache is not necessarily going to simplify things.
> The page-aligned property is only a matter of the inode,offset hash
> table, and virtually nothing else really cares. Shrink_mmap, or
> pgflush, the most universall parts of the page cache do not.
Any mmap()able files *need* to be page aligned in cache. Internal
filesystem accesses are always block aligned, not page aligned. That's
the conflict.
--Stephen
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next prev parent reply other threads:[~1998-08-17 15:53 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-07-13 16:53 Stephen C. Tweedie
1998-07-13 18:08 ` Eric W. Biederman
1998-07-13 18:29 ` Zlatko Calusic
1998-07-14 17:32 ` Stephen C. Tweedie
1998-07-16 12:31 ` Zlatko Calusic
1998-07-14 17:30 ` Stephen C. Tweedie
1998-07-18 1:10 ` Eric W. Biederman
1998-07-18 13:28 ` Zlatko Calusic
1998-07-18 16:40 ` Eric W. Biederman
1998-07-20 9:15 ` Zlatko Calusic
1998-07-22 10:40 ` Stephen C. Tweedie
1998-07-23 10:06 ` Zlatko Calusic
1998-07-23 12:22 ` Stephen C. Tweedie
1998-07-23 14:07 ` Zlatko Calusic
1998-07-23 17:18 ` Stephen C. Tweedie
1998-07-23 19:33 ` Zlatko Calusic
1998-07-27 10:57 ` Stephen C. Tweedie
1998-07-26 14:49 ` Eric W Biederman
1998-07-27 11:02 ` Stephen C. Tweedie
1998-08-02 5:19 ` Eric W Biederman
1998-08-17 13:57 ` Stephen C. Tweedie [this message]
1998-08-17 15:35 ` Stephen C. Tweedie
1998-08-20 12:40 ` Eric W. Biederman
1998-07-20 15:58 ` Stephen C. Tweedie
1998-07-22 10:36 ` Stephen C. Tweedie
1998-07-22 18:01 ` Rik van Riel
1998-07-23 10:59 ` Stephen C. Tweedie
1998-07-22 10:33 ` Stephen C. Tweedie
1998-07-23 10:59 ` Zlatko Calusic
1998-07-23 12:23 ` Stephen C. Tweedie
1998-07-23 15:06 ` Zlatko Calusic
1998-07-23 15:17 ` Benjamin C.R. LaHaise
1998-07-23 15:25 ` Zlatko Calusic
1998-07-23 17:27 ` Benjamin C.R. LaHaise
1998-07-23 19:17 ` Dr. Werner Fink
1998-07-23 17:12 ` Stephen C. Tweedie
1998-07-23 17:42 ` Zlatko Calusic
1998-07-23 19:12 ` Dr. Werner Fink
1998-07-27 10:40 ` Stephen C. Tweedie
1998-07-23 19:51 ` Rik van Riel
1998-07-24 11:21 ` Zlatko Calusic
1998-07-24 14:25 ` Rik van Riel
1998-07-24 17:01 ` Zlatko Calusic
1998-07-24 21:55 ` Rik van Riel
1998-07-25 13:05 ` Zlatko Calusic
1998-07-27 10:54 ` Stephen C. Tweedie
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