From: Jason Papadopoulos <jasonp@boo.net>
To: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] page coloring for 2.4.18 kernel
Date: Tue, 23 Apr 2002 22:48:11 -0400 [thread overview]
Message-ID: <3.0.6.32.20020423224811.007ce440@boo.net> (raw)
In-Reply-To: <1019598814.1465.254.camel@phantasy>
At 05:53 PM 4/23/02 -0400, Robert Love wrote:
>On Tue, 2002-04-23 at 17:51, Dieter Nützel wrote:
>
>> Page coloring for 2.4.18+ isn't preempt save?
>>
>> It gave ~10% speedup for memory intensive apps on my single 1 GHz Athlon II
>> SlotA (0,18µm, L2 512K) but look the system hard from time to time. Nothing
>> in the logs.
>>
>> I've changed the patch for 2.4.19-pre7 + vm3 + latest rml-O(1) + preempt.
>
>Beats me. Some of the implementations of page colouring I have seen are
>not even SMP-safe.
>
>"Don't do that"
While I haven't tested on an SMP system, the patch should at least be
SMP safe. As for preempt-safe, I noticed in Dieter's previous tests that
the free list had been sufficiently fragmented that there were no high-
order groups of pages left available. Could this cause a problem?
I can't track this list carefully enough to apply and test all the patches
mentioned.
jasonp
next prev parent reply other threads:[~2002-04-24 2:42 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-23 21:51 Dieter Nützel
2002-04-23 21:53 ` Robert Love
2002-04-24 2:48 ` Jason Papadopoulos [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-04-09 1:09 Dieter Nützel
2002-04-07 15:01 Jason Papadopoulos
2002-06-04 13:16 ` David S. Miller
2002-06-04 16:59 ` David S. Miller
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