From: Jeff Dike <jdike@addtoit.com>
To: Davide Libenzi <davidel@xmailserver.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [RFC] /dev/anon
Date: Wed, 14 Jan 2004 09:41:31 -0500 [thread overview]
Message-ID: <20040114144131.GA6407@ccure.user-mode-linux.org> (raw)
In-Reply-To: <Pine.LNX.4.44.0401131817121.12810-100000@bigblue.dev.mdolabs.com>
On Tue, Jan 13, 2004 at 08:46:23PM -0800, Davide Libenzi wrote:
> What do you mean for throw out data? If you mean writing DONTNEED'ed
> dirty pages to the backed up file and release them to the page cache, it
> does.
Writing dirty pages to backing store isn't throwing them out.
> If you mean stop handling page faults inside the DONTNEED'ed region,
> it does not.
This is kind of moot since the region won't be mapped anywhere, so there
can't be page faults on it.
> If you mean zero-filling (ala ftruncate()) the DONTNEED'ed
> region, it obviously does not.
Yes, I mean this, as a side-effect of dropping the region as though it were
clean.
> I thought your goal was to release memory
> to the host, that's why I proposed sys_madvise(MADV_DONTNEED).
It is, I want memory released immediately as though it were clean, and
MADV_DONTNEED doesn't help.
Jeff
next prev parent reply other threads:[~2004-01-14 14:20 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-13 20:21 [RFC] /dev/anon Jeff Dike
2004-01-13 20:38 ` Davide Libenzi
2004-01-14 1:42 ` Jeff Dike
2004-01-14 4:46 ` Davide Libenzi
2004-01-14 5:18 ` Nuno Silva
2004-01-14 14:41 ` Jeff Dike [this message]
2004-01-14 18:23 ` Davide Libenzi
2004-01-14 22:32 ` Andrew Morton
2004-01-14 22:45 ` Davide Libenzi
2004-01-16 12:16 ` Geert Uytterhoeven
2004-01-16 16:02 ` Andries Brouwer
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=20040114144131.GA6407@ccure.user-mode-linux.org \
--to=jdike@addtoit.com \
--cc=davidel@xmailserver.org \
--cc=linux-kernel@vger.kernel.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.