From: "H. Peter Anvin" <hpa@zytor.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <andi@firstfloor.org>,
Frederik Deweerdt <frederik.deweerdt@xprog.eu>,
tglx@linutronix.de, linux-kernel@vger.kernel.org
Subject: Re: [patch] tlb flush_data: replace per_cpu with an array
Date: Mon, 12 Jan 2009 14:59:44 -0800 [thread overview]
Message-ID: <496BCB60.6040504@zytor.com> (raw)
In-Reply-To: <20090112224037.GA16585@elte.hu>
Ingo Molnar wrote:
>> Nope it doesn't save memory on most systems because per cpu is only
>> allocated based on the CPUs that are actually there. And if you have
>> more than 8 cores you can likely afford a few bytes per CPU.
>
> No distro kernel will build with less than 8 CPUs anyway so this point is
> moot.
Except for embedded, which will build for exactly what's in the box.
-hpa
next prev parent reply other threads:[~2009-01-12 22:59 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-12 21:35 [patch] tlb flush_data: replace per_cpu with an array Frederik Deweerdt
2009-01-12 21:46 ` Ingo Molnar
2009-01-12 21:57 ` Andi Kleen
2009-01-12 22:10 ` Frederik Deweerdt
2009-01-12 22:32 ` Andi Kleen
2009-01-12 22:50 ` Ingo Molnar
2009-01-12 22:40 ` Ingo Molnar
2009-01-12 22:59 ` H. Peter Anvin [this message]
2009-01-13 2:43 ` Andi Kleen
2009-01-13 12:28 ` Ingo Molnar
2009-01-12 22:34 ` Ravikiran G Thirumalai
2009-01-12 23:00 ` Ingo Molnar
2009-01-12 23:09 ` Ingo Molnar
2009-01-13 2:14 ` Ravikiran G Thirumalai
2009-01-13 12:00 ` Peter Zijlstra
2009-01-13 12:33 ` Ingo Molnar
2009-01-13 18:13 ` Ravikiran G Thirumalai
2009-01-13 18:34 ` Ingo Molnar
2009-01-13 18:42 ` Ravikiran G Thirumalai
2009-01-14 7:31 ` Ingo Molnar
2009-01-15 7:15 ` Ravikiran G Thirumalai
2009-01-14 9:08 ` Andi Kleen
2009-01-14 14:41 ` Frederik Deweerdt
2009-01-14 15:20 ` Andi Kleen
2009-01-14 15:10 ` Frederik Deweerdt
2009-01-12 22:54 ` Mike Travis
2009-01-12 23:51 ` Frederik Deweerdt
2009-01-12 23:57 ` Mike Travis
2009-01-13 0:01 ` Ingo Molnar
2009-01-13 3:36 ` Andi Kleen
2009-01-13 12:14 ` Ingo Molnar
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