linux-kernel - Re: [patch 2/2] x86, fpu: lazy allocation of FPU area

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Message-ID: <20080305194801.GB4386@ucw.cz>
Date:	Wed, 5 Mar 2008 20:48:01 +0100
From:	Pavel Machek <pavel@....cz>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	mingo@...e.hu, hpa@...or.com, tglx@...utronix.de,
	andi@...stfloor.org, hch@...radead.org,
	linux-kernel@...r.kernel.org,
	Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3

On Mon 2008-03-03 15:02:46, Suresh Siddha wrote:
> Only allocate the FPU area when the application actually uses FPU, i.e., in the
> first lazy FPU trap. This could save memory for non-fpu using apps.

How many such apps are on your system, and how much does this
'optimalization' cost?

ISTR glibc always using FPU...?
-- 
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