From: Jamie Lokier <lk@tantalophile.demon.co.uk>
To: "Stephen C. Tweedie" <sct@redhat.com>
Cc: Richard Guenther <richard.guenther@student.uni-tuebingen.de>,
Linux Kernel List <linux-kernel@vger.rutgers.edu>,
glame-devel@lists.sourceforge.net, Linux-MM <linux-mm@kvack.org>
Subject: Re: mmap/munmap semantics
Date: Thu, 24 Feb 2000 03:35:02 +0100 [thread overview]
Message-ID: <20000224033502.B6548@pcep-jamie.cern.ch> (raw)
In-Reply-To: <14516.11124.729025.321352@dukat.scot.redhat.com>; from Stephen C. Tweedie on Wed, Feb 23, 2000 at 06:48:20PM +0000
Stephen C. Tweedie wrote:
> > - I need to "drop" a mapping sometimes without writing the contents
> > back to disk - I cannot see a way to do this with linux currently.
>
> The only way is to use Chuck Lever's madvise() patches:
> madvise(MADV_DONTNEED) is exactly what you need there. It's not yet in
> Linus's 2.3 tree, but the API is pretty standard.
I don't think MADV_DONTNEED actually drops privately modified data does
it? I thought it was merely a hint to the kernel that the data will not
be accessed again soon, so it can be paged out or, if unmodified,
dropped. All the other MADV_* flags are access hints.
-- Jamie
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux.eu.org/Linux-MM/
next prev parent reply other threads:[~2000-02-24 2:35 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-02-22 17:46 Richard Guenther
2000-02-22 18:36 ` James Antill
2000-02-22 18:41 ` Benjamin C.R. LaHaise
2000-02-23 10:57 ` Richard Guenther
2000-02-23 15:58 ` Benjamin C.R. LaHaise
2000-02-24 10:06 ` Richard Guenther
2000-02-22 21:48 ` Richard Gooch
2000-02-23 3:49 ` Eric W. Biederman
2000-02-23 11:14 ` Richard Guenther
2000-02-23 15:44 ` Jamie Lokier
2000-02-23 18:48 ` Stephen C. Tweedie
2000-02-24 2:35 ` Jamie Lokier [this message]
2000-02-24 12:13 ` Stephen C. Tweedie
2000-02-24 12:24 ` Richard Guenther
2000-02-24 13:51 ` Stephen C. Tweedie
2000-02-24 15:01 ` kernel
2000-02-24 15:03 ` Richard Guenther
2000-02-24 15:15 ` Jamie Lokier
2000-02-24 13:06 ` lars brinkhoff
2000-02-24 14:42 ` Jamie Lokier
2000-02-24 13:41 ` Eric W. Biederman
2000-02-24 13:49 ` Stephen C. Tweedie
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=20000224033502.B6548@pcep-jamie.cern.ch \
--to=lk@tantalophile.demon.co.uk \
--cc=glame-devel@lists.sourceforge.net \
--cc=linux-kernel@vger.rutgers.edu \
--cc=linux-mm@kvack.org \
--cc=richard.guenther@student.uni-tuebingen.de \
--cc=sct@redhat.com \
/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