From: Hans Reiser <reiser@namesys.com>
To: Matt <matt@progsoc.uts.edu.au>
Cc: Rik van Riel <riel@conectiva.com.br>, Shawn <spstarr@sh0n.net>,
linux-kernel@vger.kernel.org,
Josh MacDonald <jmacd@CS.Berkeley.EDU>
Subject: Re: Possible Idea with filesystem buffering.
Date: Mon, 21 Jan 2002 03:57:28 +0300 [thread overview]
Message-ID: <3C4B6778.7040509@namesys.com> (raw)
In-Reply-To: <Pine.LNX.4.33L.0201201936340.32617-100000@imladris.surriel.com> <3C4B3B67.60505@namesys.com> <20020121111005.F12258@ftoomsh.progsoc.uts.edu.au>
Matt wrote:
>On Mon, Jan 21, 2002 at 12:49:27AM +0300, Hans Reiser wrote:
>
>>Rik van Riel wrote:
>>
>
>[snip snip]
>
>>>On basically any machine we'll have multiple memory zones.
>>>
>
>>>Each of those memory zones has its own free list and each of the
>>>zones can get low on free pages independantly of the other zones.
>>>
>
>>>This means that if the VM asks to get a particular page freed, at
>>>the very minimum you need to make a page from the same zone
>>>freeable.
>>>
>
>>>regards,
>>>
>
>>>Rik
>>>
>
>
>>I'll discuss with Josh tomorrow how we might implement support for that.
>> A clean and simple mechanism does not come to my mind immediately.
>>
>
>>Hans
>>
>
>i know this sounds semi-evil, but can't you just drop another non
>dirty page and do a copy if you need the page you have been asked to
>write out? because if you have no non dirty pages around you'd
>probably have to drop the page anyway at some stage..
>
> matt
>
Yes, but it is seriously suboptimal to do copies if not really needed.
So, if we really must, then yes, but must we? Would be best if VM told us
if we really must write that page.
Hans
next prev parent reply other threads:[~2002-01-21 1:01 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-20 9:04 Possible Idea with filesystem buffering Shawn
2002-01-20 11:31 ` Hans Reiser
2002-01-20 13:56 ` Rik van Riel
2002-01-20 14:21 ` Hans Reiser
2002-01-20 15:13 ` Rik van Riel
2002-01-20 21:15 ` Hans Reiser
2002-01-20 21:24 ` Rik van Riel
2002-01-20 21:30 ` Hans Reiser
2002-01-20 21:40 ` Rik van Riel
2002-01-20 21:49 ` Hans Reiser
2002-01-20 22:00 ` Rik van Riel
2002-01-21 0:10 ` Matt
2002-01-21 0:57 ` Hans Reiser [this message]
2002-01-21 1:28 ` Anton Altaparmakov
2002-01-21 2:29 ` Shawn Starr
2002-01-21 19:15 ` Shawn Starr
2002-01-22 22:02 ` Hans Reiser
2002-01-21 9:21 ` Horst von Brand
2002-01-21 9:13 ` Horst von Brand
2002-01-21 15:29 ` Eric W. Biederman
2002-01-20 17:51 ` Mark Hahn
2002-01-20 21:24 ` Hans Reiser
2002-01-20 21:32 ` Rik van Riel
2002-01-21 15:37 ` Eric W. Biederman
2002-01-20 22:45 ` Shawn Starr
2002-01-20 23:11 ` Rik van Riel
2002-01-20 23:40 ` Shawn Starr
2002-01-20 23:48 ` Rik van Riel
2002-01-21 0:44 ` Hans Reiser
2002-01-21 0:52 ` Rik van Riel
2002-01-21 1:08 ` Hans Reiser
2002-01-21 1:39 ` Rik van Riel
2002-01-21 11:10 ` Hans Reiser
2002-01-21 12:12 ` Rik van Riel
2002-01-21 13:42 ` Hans Reiser
2002-01-21 13:54 ` Rik van Riel
2002-01-21 14:07 ` Hans Reiser
2002-01-21 17:21 ` Chris Mason
2002-01-21 17:47 ` Hans Reiser
2002-01-21 19:44 ` Chris Mason
2002-01-21 20:41 ` Hans Reiser
2002-01-21 21:53 ` Chris Mason
2002-01-22 6:02 ` Andreas Dilger
2002-01-22 10:09 ` Tommi Kyntola
2002-01-22 11:39 ` Hans Reiser
2002-01-22 18:41 ` Andrew Morton
2002-01-22 19:03 ` Rik van Riel
2002-01-23 20:35 ` [Ext2-devel] " Stephen C. Tweedie
2002-01-23 20:48 ` Hans Reiser
2002-01-23 20:55 ` Andrew Morton
2002-01-23 23:53 ` Hugh Dickins
2002-01-24 0:01 ` Jeff Garzik
2002-01-22 20:19 ` Hans Reiser
2002-01-22 20:50 ` Rik van Riel
2002-01-22 14:03 ` Chris Mason
2002-01-22 14:39 ` Rik van Riel
2002-01-22 18:46 ` Hans Reiser
2002-01-22 19:19 ` Chris Mason
2002-01-22 20:13 ` Steve Lord
2002-01-22 21:22 ` Chris Mason
2002-01-22 20:32 ` Hans Reiser
2002-01-22 21:08 ` Chris Mason
2002-01-22 22:05 ` Hans Reiser
2002-01-22 22:21 ` Rik van Riel
2002-01-23 0:16 ` Hans Reiser
2002-01-22 22:10 ` Richard B. Johnson
2002-01-23 1:14 ` Stuart Young
2002-01-23 17:16 ` Daniel Phillips
2002-01-22 21:12 ` Rik van Riel
2002-01-22 21:28 ` Shawn Starr
2002-01-22 21:31 ` Rik van Riel
2002-01-22 20:20 ` Rik van Riel
2002-01-22 22:31 ` Hans Reiser
2002-01-22 23:34 ` Rik van Riel
2002-01-23 17:15 ` Josh MacDonald
2002-01-21 0:28 ` Hans Reiser
2002-01-21 0:47 ` Rik van Riel
2002-01-21 1:01 ` Hans Reiser
2002-01-21 1:21 ` Rik van Riel
2002-01-21 1:26 ` Hans Reiser
2002-01-21 1:40 ` Rik van Riel
2002-01-20 15:49 ` Anton Altaparmakov
2002-01-20 21:21 ` Hans Reiser
-- strict thread matches above, loose matches on Subject: below --
2002-01-22 21:02 Rolf Lear
[not found] <Pine.LNX.4.33L.0201222008280.32617-100000@imladris.surriel.com>
2002-01-22 23:31 ` Shawn Starr
2002-01-22 23:37 ` Rik van Riel
2002-01-23 5:26 ` Shawn Starr
2002-01-23 9:43 Martin Knoblauch
2002-01-23 11:52 ` Helge Hafting
2002-01-23 12:02 ` Rik van Riel
2002-01-23 12:11 ` Martin Knoblauch
[not found] <Pine.LNX.4.33.0201231301560.24338-100000@coffee.psychology.mcmaster.ca>
[not found] ` <3C4FC478.BCC44CDF@TeraPort.de>
[not found] ` <3C4FDB80.C9F83EBB@aitel.hist.no>
2002-01-24 13:59 ` Martin Knoblauch
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=3C4B6778.7040509@namesys.com \
--to=reiser@namesys.com \
--cc=jmacd@CS.Berkeley.EDU \
--cc=linux-kernel@vger.kernel.org \
--cc=matt@progsoc.uts.edu.au \
--cc=riel@conectiva.com.br \
--cc=spstarr@sh0n.net \
/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