From: Adrian Bunk <bunk@fs.tum.de>
To: Manfred Spraul <manfred@colorfullife.com>
Cc: linux-kernel@vger.kernel.org, peter_daum@t-online.de
Subject: Re: [2.4 patch] fix CONFIG_X86_L1_CACHE_SHIFT
Date: Mon, 8 Sep 2003 16:20:46 +0200 [thread overview]
Message-ID: <20030908142046.GA28062@fs.tum.de> (raw)
In-Reply-To: <3F5B96C3.1060706@colorfullife.com>
On Sun, Sep 07, 2003 at 10:36:19PM +0200, Manfred Spraul wrote:
> Adrian wrote:
>
> >With CONFIG_M686 CONFIG_X86_L1_CACHE_SHIFT was set to 5, but a Pentium 4
> >requires 7.
> >
> >
> Why requires? On x86, the cpu caches are fully coherent. A too small L1
> cache shift results in false sharing on SMP, but it shouldn't cause the
> described problems.
>...
Thanks for the correction, I falsely thought CONFIG_X86_L1_CACHE_SHIFT
does something different than it does.
> Manfred
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
next prev parent reply other threads:[~2003-09-08 14:21 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-07 20:36 [2.4 patch] fix CONFIG_X86_L1_CACHE_SHIFT Manfred Spraul
2003-09-08 14:20 ` Adrian Bunk [this message]
2003-09-08 17:07 ` Jamie Lokier
2003-09-08 17:24 ` Jeff Garzik
2003-09-08 19:45 ` Manfred Spraul
2003-09-09 14:49 ` Peter Daum
[not found] <20030907195557.GK14436@fs.tum.de.suse.lists.linux.kernel>
2003-09-07 20:30 ` Andi Kleen
2003-09-07 21:39 ` Dave Jones
2003-09-08 8:15 ` Peter Daum
[not found] ` <Pine.LNX.4.30.0309072228110.9987-100000@swamp.bayern.net.suse.lists.linux.kernel>
2003-09-07 21:57 ` Andi Kleen
-- strict thread matches above, loose matches on Subject: below --
2003-09-07 19:55 Adrian Bunk
2003-09-07 20:59 ` Peter Daum
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