From: Andi Kleen <ak@muc.de>
To: sander@humilis.net
Cc: "Sergey S. Kostyliov" <rathamahata@ehouse.ru>,
linux-kernel@vger.kernel.org
Subject: Re: NUMA or not on dual Opteron
Date: Thu, 13 Jan 2005 20:38:33 +0100 [thread overview]
Message-ID: <m1sm552k7a.fsf@muc.de> (raw)
In-Reply-To: <20050113094537.GB2547@favonius> (sander@humilis.net's message of "Thu, 13 Jan 2005 10:45:37 +0100")
Sander <sander@humilis.net> writes:
> Linus Torvalds wrote (ao):
>> On Wed, 12 Jan 2005, Sergey S. Kostyliov wrote:
>> > 2.6.10-rc1 hangs at boot stage for my dual opteron machine
>>
>> Oops, yes. There's some recent NUMA breakage - either disable
>> CONFIG_NUMA, or apply the patches that Andi Kleen just posted on the
>> mailing list (the second option much preferred, just to verify that
>> yes, that does fix it).
>
> I was under the impression that NUMA is useful on > 2-way systems only.
> Is this true, and if not, under what circumstances is NUMA useful on
> 2-way Opteron systems?
I don't know who gave you this impression, but it's wrong. Using a
NUMA aware kernel is an advantage under many workloads on a 2way
Opteron system.
>
> In other words: why should one want NUMA to be enabled or disabled for
> dual Opteron?
Because it is faster.
-Andi
next prev parent reply other threads:[~2005-01-13 20:26 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-12 5:09 Linux 2.6.11-rc1 Linus Torvalds
2005-01-12 7:07 ` Keith Owens
2005-01-12 7:32 ` Markus Trippelsdorf
2005-01-13 22:37 ` Linux 2.6.11-rc1 (ACPI related problems) Hanspeter Kunz
2005-01-12 8:24 ` Linux 2.6.11-rc1 Brice Goglin
2005-01-12 9:20 ` Tino Keitel
2005-01-12 9:38 ` Brice Goglin
2005-01-12 14:13 ` Dmitry Torokhov
2005-01-12 14:35 ` Brice Goglin
2005-01-12 15:50 ` Linus Torvalds
2005-01-12 19:13 ` Vojtech Pavlik
2005-01-12 15:24 ` Sergey S. Kostyliov
2005-01-12 15:32 ` Linus Torvalds
2005-01-12 15:44 ` Gene Heskett
2005-01-12 16:03 ` Sergey S. Kostyliov
2005-01-13 9:45 ` NUMA or not on dual Opteron (was: Re: Linux 2.6.11-rc1) Sander
2005-01-13 10:02 ` NUMA or not on dual Opteron Raphael Jacquot
2005-01-13 17:07 ` Justin M. Forbes
2005-01-13 19:43 ` Andi Kleen
2005-01-13 19:40 ` Andi Kleen
2005-01-13 15:36 ` NUMA or not on dual Opteron (was: Re: Linux 2.6.11-rc1) Alan Cox
2005-01-13 19:38 ` Andi Kleen [this message]
2005-01-15 23:42 ` NUMA or not on dual Opteron Sander
2005-01-13 21:24 ` Bernd Eckenfels
2005-01-14 8:04 ` David Schwartz
2005-01-14 8:10 ` Arjan van de Ven
2005-01-14 8:48 ` Andi Kleen
2005-01-12 19:06 ` Linux 2.6.11-rc1 -- usb_storage and Genesys Jan De Luyck
2005-01-13 5:42 ` [PATCH] contort getdents64 to pacify gcc-2.96 Adam Kropelin
2005-01-13 3:51 ` Linus Torvalds
2005-01-13 23:15 ` Linux 2.6.11-rc1 (compile stats) John Cherry
2005-01-16 9:22 ` Cross-compilation broken (was: Re: Linux 2.6.11-rc1) Geert Uytterhoeven
2005-01-16 16:09 ` Sam Ravnborg
2005-01-17 9:00 ` Geert Uytterhoeven
2005-01-19 21:07 ` Linux 2.6.11-rc1 Daniel Gryniewicz
2005-01-20 4:16 ` Dmitry Torokhov
2005-01-20 4:49 ` Daniel Gryniewicz
2005-01-20 7:17 ` Peter Osterlund
2005-01-20 15:01 ` Romano Giannetti
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