linux-kernel - Re: [PATCH] x86: Disable CONFIG_X86_DECODER

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Message-ID: <20140205173202.GL11821@two.firstfloor.org>
Date:	Wed, 5 Feb 2014 18:32:02 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Paul Gortmaker <paul.gortmaker@...driver.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Borislav Petkov <bp@...en8.de>,
	LKML <linux-kernel@...r.kernel.org>, X86 ML <x86@...nel.org>,
	Richard Weinberger <richard@....at>,
	Borislav Petkov <bp@...e.de>
Subject: Re: [PATCH] x86: Disable CONFIG_X86_DECODER_SELFTEST in
 allmod/allyesconfigs

> For the record, even with a (currently) modern CPU such as a
> Xeon E5-2630 @ 2.30GHz, the script takes 4m30s on 3.14-rc1
> i386 allyesconfig.  And since it runs single threaded at the end
> of the build, it really adds that amount to the wall time spent
> on the build. So enthusiastically Acked, FWIW.

I suppose we could just multi thread it. It should 
"embarassingly" scale without problems. But turning it off by default is a
first step.

-Andi
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