linux-kernel - Re: [PATCH 12/29] x86, tsx: Add a per thread transaction disable count

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Message-ID: <20130323135156.GJ20853@two.firstfloor.org>
Date:	Sat, 23 Mar 2013 14:51:56 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Borislav Petkov <bp@...en8.de>, Andi Kleen <andi@...stfloor.org>,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, x86@...nel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 12/29] x86, tsx: Add a per thread transaction disable
 count

> 
> This surely can be a bitfield like the other two below. It is basically
> begging to be one.

Bit fields are slower and larger in code and unlike the others this is on hot
paths.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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