From: "Stephen C. Tweedie" <sct@redhat.com>
To: Rik van Riel <H.H.vanRiel@phys.uu.nl>
Cc: Zlatko Calusic <Zlatko.Calusic@CARNet.hr>,
"Stephen C. Tweedie" <sct@redhat.com>,
Linux MM <linux-mm@kvack.org>
Subject: Re: [PATCH] swapin readahead
Date: Wed, 2 Dec 1998 17:35:26 GMT [thread overview]
Message-ID: <199812021735.RAA04489@dax.scot.redhat.com> (raw)
In-Reply-To: <Pine.LNX.3.96.981201192554.4046A-100000@mirkwood.dummy.home>
Hi,
On Tue, 1 Dec 1998 19:32:52 +0100 (CET), Rik van Riel
<H.H.vanRiel@phys.uu.nl> said:
> I took the bet that shrink_mmap() would take care of that, but
> aperrantly not always :(
shrink_mmap() only gets rid of otherwise unused pages (pages whose count
is one). After read_swap_cache_async(), the page count will be three:
once for the swap cache, once for the io in progress, once for the
reference returned by read_swap_cache_async(). You need to free that
last reference explicitly after doing the readahead call. The io
reference will be returned once IO completes, and shrink_mmap() will
take care of the final swap cache reference.
--Stephen
--
This is a majordomo managed list. To unsubscribe, send a message with
the body 'unsubscribe linux-mm me@address' to: majordomo@kvack.org
next prev parent reply other threads:[~1998-12-02 17:35 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-11-26 23:23 Rik van Riel
1998-12-01 15:13 ` Stephen C. Tweedie
1998-12-01 15:41 ` Rik van Riel
1998-12-01 15:51 ` Zlatko Calusic
1998-12-01 16:42 ` Rik van Riel
1998-12-01 17:20 ` Zlatko Calusic
1998-12-01 18:32 ` Rik van Riel
1998-12-02 17:35 ` Stephen C. Tweedie [this message]
1998-12-02 21:18 ` Zlatko Calusic
1998-12-03 5:25 ` Eric W. Biederman
1998-12-03 8:55 ` Zlatko Calusic
1998-12-03 15:39 ` Eric W. Biederman
1998-12-03 10:07 ` Rik van Riel
1998-12-02 17:33 ` Stephen C. Tweedie
1998-12-03 14:44 ` Rik van Riel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=199812021735.RAA04489@dax.scot.redhat.com \
--to=sct@redhat.com \
--cc=H.H.vanRiel@phys.uu.nl \
--cc=Zlatko.Calusic@CARNet.hr \
--cc=linux-mm@kvack.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox