From: William Lee Irwin III <wli@holomorphy.com>
To: Andrew Morton <akpm@zip.com.au>
Cc: Rik van Riel <riel@conectiva.com.br>,
Andrea Arcangeli <andrea@suse.de>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Linus Torvalds <torvalds@transmeta.com>
Subject: Re: vm lock contention reduction
Date: Sun, 7 Jul 2002 17:59:20 -0700 [thread overview]
Message-ID: <20020708005920.GD25360@holomorphy.com> (raw)
In-Reply-To: <3D263E70.7B8F5307@zip.com.au>
Rik van Riel wrote:
>> But it is, mmap() and anonymous memory don't trigger writeback.
On Fri, Jul 05, 2002 at 05:48:48PM -0700, Andrew Morton wrote:
> That's different. Bill hit a problem just running tiobench.
> We can run balance_dirty_pages() when a COW copyout is performed,
> which will approximately improve things.
> But the whole idea of the dirty memory thresholds just seems bust,
> really. Because how do you pick the thresholds? 40%. Bah.
I don't know what the answer should be, but I can certainly demonstrate
this in a rather uninteresting situation (4GB, 4cpu's, 1 disk, 16 tasks).
But I can concur with that evaluation. In my esteem fixed fractions of
memory don't have a very direct relationship to what's going on.
Cheers,
Bill
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prev parent reply other threads:[~2002-07-08 0:59 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-04 23:05 vm lock contention reduction Andrew Morton
2002-07-04 23:26 ` Rik van Riel
2002-07-04 23:27 ` Rik van Riel
2002-07-05 1:37 ` Andrew Morton
2002-07-05 1:49 ` Rik van Riel
2002-07-05 2:18 ` Andrew Morton
2002-07-05 2:16 ` Rik van Riel
2002-07-05 2:53 ` Andrew Morton
2002-07-05 3:52 ` Benjamin LaHaise
2002-07-05 4:47 ` Linus Torvalds
2002-07-05 5:38 ` Andrew Morton
2002-07-05 5:51 ` Linus Torvalds
2002-07-05 6:08 ` Linus Torvalds
2002-07-05 6:27 ` Alexander Viro
2002-07-05 6:33 ` Andrew Morton
2002-07-05 7:33 ` Andrea Arcangeli
2002-07-07 2:50 ` Andrew Morton
2002-07-07 3:05 ` Linus Torvalds
2002-07-07 3:47 ` Andrew Morton
2002-07-08 11:39 ` Enhanced profiling support (was Re: vm lock contention reduction) John Levon
2002-07-08 11:39 ` John Levon
2002-07-08 17:52 ` Linus Torvalds
2002-07-08 17:52 ` Linus Torvalds
2002-07-08 18:41 ` Karim Yaghmour
2002-07-08 18:41 ` Karim Yaghmour
2002-07-10 2:22 ` John Levon
2002-07-10 2:22 ` John Levon
2002-07-10 4:16 ` Karim Yaghmour
2002-07-10 4:16 ` Karim Yaghmour
2002-07-10 4:38 ` John Levon
2002-07-10 4:38 ` John Levon
2002-07-10 5:46 ` Karim Yaghmour
2002-07-10 5:46 ` Karim Yaghmour
2002-07-10 13:10 ` bob
2002-07-10 13:10 ` bob
2002-07-09 16:57 ` John Levon
2002-07-09 19:56 ` Karim Yaghmour
2002-07-07 5:16 ` vm lock contention reduction Martin J. Bligh
2002-07-07 6:13 ` scalable kmap (was Re: vm lock contention reduction) Martin J. Bligh
2002-07-07 6:37 ` Andrew Morton
2002-07-07 7:53 ` Linus Torvalds
2002-07-07 9:04 ` Andrew Morton
2002-07-07 16:13 ` Martin J. Bligh
2002-07-07 18:31 ` Linus Torvalds
2002-07-07 18:55 ` Linus Torvalds
2002-07-07 19:02 ` Linus Torvalds
2002-07-08 7:24 ` Andrew Morton
2002-07-08 8:09 ` Andrea Arcangeli
2002-07-08 14:50 ` William Lee Irwin III
2002-07-08 20:39 ` Andrew Morton
2002-07-08 21:08 ` Benjamin LaHaise
2002-07-08 21:45 ` Andrew Morton
2002-07-08 22:24 ` Benjamin LaHaise
2002-07-07 16:00 ` Martin J. Bligh
2002-07-07 18:28 ` Linus Torvalds
2002-07-08 7:11 ` Andrea Arcangeli
2002-07-08 10:15 ` Eric W. Biederman
2002-07-08 7:00 ` Andrea Arcangeli
2002-07-08 17:29 ` Martin J. Bligh
2002-07-08 22:14 ` Linus Torvalds
2002-07-09 0:16 ` Andrew Morton
2002-07-09 3:17 ` Andrew Morton
2002-07-09 4:28 ` Martin J. Bligh
2002-07-09 5:28 ` Andrew Morton
2002-07-09 6:15 ` Martin J. Bligh
2002-07-09 6:30 ` William Lee Irwin III
2002-07-09 6:32 ` William Lee Irwin III
2002-07-09 16:08 ` Martin J. Bligh
2002-07-09 17:32 ` Andrea Arcangeli
2002-07-10 5:32 ` Andrew Morton
2002-07-10 22:43 ` Martin J. Bligh
2002-07-10 23:08 ` Andrew Morton
2002-07-10 23:26 ` Martin J. Bligh
2002-07-11 0:19 ` Andrew Morton
2002-07-12 17:48 ` Martin J. Bligh
2002-07-13 11:18 ` Andrea Arcangeli
2002-07-09 13:59 ` Benjamin LaHaise
2002-07-08 0:38 ` vm lock contention reduction William Lee Irwin III
2002-07-05 6:46 ` Andrew Morton
2002-07-05 14:25 ` Rik van Riel
2002-07-05 23:11 ` William Lee Irwin III
2002-07-05 23:48 ` Andrew Morton
2002-07-06 0:11 ` Rik van Riel
2002-07-06 0:31 ` Linus Torvalds
2002-07-06 0:45 ` Rik van Riel
2002-07-06 0:48 ` Andrew Morton
2002-07-08 0:59 ` William Lee Irwin III [this message]
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