From: William Lee Irwin III <wli@holomorphy.com>
To: Andrew Morton <akpm@zip.com.au>
Cc: Robert Love <rml@tech9.net>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] low-latency zap_page_range()
Date: Thu, 29 Aug 2002 14:38:30 -0700 [thread overview]
Message-ID: <20020829213830.GG888@holomorphy.com> (raw)
In-Reply-To: <3D6E8B25.425263D5@zip.com.au>
Robert Love wrote:
>> unless we
>> wanted to unconditionally drop the locks and let preempt just do the
>> right thing and also reduce SMP lock contention in the SMP case.
On Thu, Aug 29, 2002 at 01:59:17PM -0700, Andrew Morton wrote:
> That's an interesting point. page_table_lock is one of those locks
> which is occasionally held for ages, and frequently held for a short
> time.
> I suspect that yes, voluntarily popping the lock during the long holdtimes
> will allow other CPUs to get on with stuff, and will provide efficiency
> increases. (It's a pretty lame way of doing that though).
> But I don't recall seeing nasty page_table_lock spintimes on
> anyone's lockmeter reports, so...
You will. There are just bigger fish to fry at the moment.
Cheers,
Bill
--
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-mm.org/
next prev parent reply other threads:[~2002-08-29 21:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-29 15:31 Robert Love
2002-08-29 20:30 ` Andrew Morton
2002-08-29 20:40 ` Robert Love
2002-08-29 20:46 ` Robert Love
2002-08-29 20:59 ` Andrew Morton
2002-08-29 21:38 ` William Lee Irwin III [this message]
2002-08-29 21:00 ` Andrew Morton
2002-08-29 21:12 ` Robert Love
2002-08-29 21:22 ` Andrew Morton
2002-08-29 21:46 ` 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=20020829213830.GG888@holomorphy.com \
--to=wli@holomorphy.com \
--cc=akpm@zip.com.au \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=rml@tech9.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