From: "Stephen C. Tweedie" <sct@redhat.com>
To: Billy Harvey <Billy.Harvey@thrillseeker.net>
Cc: "Stephen C. Tweedie" <sct@redhat.com>,
Linux MM <linux-mm@kvack.org>,
Linux Kernel <linux-kernel@vger.rutgers.edu>
Subject: Re: [PATCH] swapin readahead and fixes
Date: Tue, 8 Dec 1998 12:21:04 GMT [thread overview]
Message-ID: <199812081221.MAA02301@dax.scot.redhat.com> (raw)
In-Reply-To: <366C8214.F58091FF@thrillseeker.net>
Hi,
On Mon, 07 Dec 1998 20:34:12 -0500, Billy Harvey
<Billy.Harvey@thrillseeker.net> said:
> Has anyone ever looked at the following concept? In addition to a
> swap-in read-ahead, have a swap-out write-ahead. The idea is to use all
> the avaialble swap space as a mirror of memory.
We already do that. That's what the swap cache is. When kswapd swaps
stuff out, it does so asynchronously, but leaves the data in the swap
cache where it can be picked up again if another process wants the
swap entry back. Most importantly, it lets us do the writing to swap
very rapidly, as we can efficiently stream the updates to disk.
--Stephen
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next prev parent reply other threads:[~1998-12-08 12:21 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-12-03 17:56 Rik van Riel
1998-12-04 11:34 ` Stephen C. Tweedie
1998-12-04 14:02 ` Rik van Riel
1998-12-04 14:34 ` Stephen C. Tweedie
1998-12-05 9:46 ` Gerard Roudier
1998-12-07 16:50 ` Stephen C. Tweedie
1998-12-08 1:34 ` Billy Harvey
1998-12-08 2:31 ` Rik van Riel
1998-12-08 2:51 ` Billy Harvey
1998-12-08 3:00 ` Rik van Riel
1998-12-08 12:35 ` Stephen C. Tweedie
1998-12-08 13:51 ` Rik van Riel
1998-12-09 2:41 ` Drago Goricanec
1998-12-09 11:58 ` Stephen C. Tweedie
1998-12-08 12:21 ` Stephen C. Tweedie [this message]
1998-12-05 10:47 ` Gerard Roudier
1998-12-04 19:25 ` Chris Evans
1998-12-04 20:47 ` Rik van Riel
1998-12-05 18:59 ` Alan Cox
1998-12-05 19:02 ` Rik van Riel
1998-12-06 5:20 ` Rik van Riel
1998-12-06 5:23 ` Steve VanDevender
1998-12-07 11:52 ` Rik van Riel
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