From: Andrew Morton <akpm@zip.com.au>
To: Daniel Phillips <phillips@arcor.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Rmap speedup
Date: Fri, 02 Aug 2002 13:20:37 -0700 [thread overview]
Message-ID: <3D4AE995.DFD862EF@zip.com.au> (raw)
In-Reply-To: E17aiJv-0007cr-00@starship
Daniel Phillips wrote:
>
> This patch eliminates about 35% of the raw rmap setup/teardown overhead by
> adopting a new locking interface that allows the add_rmaps to be batched in
> copy_page_range.
Well that's fairly straightforward, thanks. Butt-ugly though ;)
Don't bother doing teardown yet. I have patches which batch
all the zap_page_range activity into 16-page chunks, so we
eventually end up in a single function with 16 virtually-contiguous
pages to release. Adding the batched locking to that will
be simple.
Sigh. I have a test which sends the 2.5.30 VM into a five-minute
coma and which immediately panics latest -ac with pte_chain oom.
Remind me again why all this is worth it?
I'll port your stuff to 2.5 over the weekend, let you know...
next prev parent reply other threads:[~2002-08-02 20:19 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-02 19:42 [PATCH] Rmap speedup Daniel Phillips
2002-08-02 20:20 ` Andrew Morton [this message]
2002-08-02 21:40 ` William Lee Irwin III
2002-08-03 0:14 ` Rik van Riel
2002-08-03 0:31 ` Andrew Morton
2002-08-03 0:52 ` William Lee Irwin III
2002-08-03 0:56 ` Rik van Riel
2002-08-03 3:47 ` Daniel Phillips
2002-08-03 5:24 ` Andrew Morton
2002-08-03 18:43 ` Daniel Phillips
2002-08-03 21:40 ` Andrew Morton
2002-08-03 21:54 ` Rik van Riel
2002-08-03 22:49 ` Daniel Phillips
2002-08-03 23:55 ` Gerrit Huizenga
2002-08-04 0:47 ` Andrew Morton
2002-08-04 1:01 ` Daniel Phillips
2002-08-04 14:11 ` Thunder from the hill
2002-08-04 14:47 ` Zwane Mwaikambo
2002-08-04 16:55 ` Tobias Ringstrom
2002-08-03 23:36 ` Daniel Phillips
2002-08-04 0:44 ` Andrew Morton
2002-08-03 21:05 ` Rik van Riel
2002-08-03 21:36 ` Daniel Phillips
2002-08-03 21:43 ` Andrew Morton
2002-08-03 21:41 ` Daniel Phillips
2002-08-03 21:24 ` [PATCH] Rmap speedup... call for testing Daniel Phillips
2002-08-03 22:05 ` [PATCH] Rmap speedup Daniel Phillips
2002-08-03 22:39 ` Andrew Morton
2002-08-03 22:35 ` Daniel Phillips
2002-08-04 23:33 ` Andrew Morton
2002-08-05 0:35 ` Daniel Phillips
2002-08-05 7:05 ` Andrew Morton
2002-08-05 13:48 ` Daniel Phillips
2002-08-05 13:57 ` Rik van Riel
2002-08-05 18:16 ` Andrew Morton
2002-08-07 18:59 ` Daniel Phillips
2002-08-07 19:40 ` Andrew Morton
2002-08-07 20:17 ` Daniel Phillips
2002-08-07 20:34 ` Andrew Morton
2002-08-07 20:51 ` Daniel Phillips
2002-08-07 20:54 ` Rik van Riel
2002-08-07 22:21 ` Daniel Phillips
2002-08-07 22:48 ` Andrew Morton
2002-08-07 20:39 ` Daniel Phillips
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