From: Andi Kleen <ak@suse.de>
To: Linus Torvalds <torvalds@osdl.org>
Cc: davidm@hpl.hp.com, "David S. Miller" <davem@redhat.com>,
wli@holomorphy.com, linux-arch@vger.kernel.org
Subject: Re: clear_user_highpage()
Date: Sat, 17 Sep 2005 21:01:55 +0200 [thread overview]
Message-ID: <1126983715.6451.20.camel@basil.nowhere.org> (raw)
In-Reply-To: <Pine.LNX.4.58.0408221245380.17766@ppc970.osdl.org>
On Sun, 2004-08-22 at 12:51 -0700, Linus Torvalds wrote:
> I obviously love the result, since it validates my theory that it's better
> to have a nice hot "clear_page()" and avoid cache misses elsewhere. Score
> one for WAGging.
Experiences on Opteron have been similar - NT seems to be a loss
for normal clear/copy_page.
However i liked the recent results of someone using it for
write() only by defining a special copy_from_user_uncached()
I suspect that would be even a win in most cases as long as you
don't do it for pipes, but only for file systems.
-Andi
next prev parent reply other threads:[~2005-09-17 19:01 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-11 23:15 clear_user_highpage() David S. Miller
2004-08-11 23:31 ` clear_user_highpage() Benjamin Herrenschmidt
2004-08-11 23:55 ` clear_user_highpage() David S. Miller
2004-08-12 0:03 ` clear_user_highpage() Benjamin Herrenschmidt
2004-08-12 1:18 ` clear_user_highpage() William Lee Irwin III
2004-08-12 2:11 ` clear_user_highpage() Andi Kleen
2004-08-12 9:23 ` clear_user_highpage() Martin Schwidefsky
2004-08-11 23:46 ` clear_user_highpage() Linus Torvalds
2004-08-11 23:53 ` clear_user_highpage() David S. Miller
2004-08-12 0:00 ` clear_user_highpage() Linus Torvalds
2004-08-12 0:06 ` clear_user_highpage() Benjamin Herrenschmidt
2004-08-12 0:24 ` clear_user_highpage() David S. Miller
2004-08-12 0:23 ` clear_user_highpage() David S. Miller
2004-08-12 1:46 ` clear_user_highpage() Linus Torvalds
2004-08-12 2:51 ` clear_user_highpage() David S. Miller
2004-08-16 1:58 ` clear_user_highpage() Paul Mackerras
2004-08-12 2:08 ` clear_user_highpage() Andi Kleen
2004-08-12 2:45 ` clear_user_highpage() David S. Miller
2004-08-12 9:09 ` clear_user_highpage() Andi Kleen
2004-08-12 19:50 ` clear_user_highpage() David S. Miller
2004-08-12 20:00 ` clear_user_highpage() Andi Kleen
2004-08-12 20:30 ` clear_user_highpage() David S. Miller
2004-08-12 21:34 ` clear_user_highpage() Matthew Wilcox
2004-08-13 8:16 ` clear_user_highpage() David Mosberger
2004-08-12 0:00 ` clear_user_highpage() Benjamin Herrenschmidt
2004-08-12 0:21 ` clear_user_highpage() Linus Torvalds
2004-08-12 0:46 ` clear_user_highpage() William Lee Irwin III
2004-08-12 1:01 ` clear_user_highpage() David S. Miller
2004-08-12 2:18 ` clear_user_highpage() Linus Torvalds
2004-08-12 2:43 ` clear_user_highpage() David S. Miller
2004-08-12 4:19 ` clear_user_highpage() Linus Torvalds
2004-08-12 4:46 ` clear_user_highpage() William Lee Irwin III
2004-08-15 6:22 ` clear_user_highpage() Andrew Morton
2004-08-15 6:38 ` clear_user_highpage() William Lee Irwin III
2004-08-12 2:57 ` clear_user_highpage() David S. Miller
2004-08-12 3:20 ` clear_user_highpage() William Lee Irwin III
2004-08-13 21:41 ` clear_user_highpage() David S. Miller
2004-08-16 13:00 ` clear_user_highpage() David Mosberger
2004-08-22 19:51 ` clear_user_highpage() Linus Torvalds
2005-09-17 19:01 ` Andi Kleen [this message]
2005-09-17 19:16 ` clear_user_highpage() Andi Kleen
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