linux-kernel - Re: [PATCH] Kbuild: Disable var tracking with CONFIG_DEBUG_INFO

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Message-ID: <20130222124730.GI12402@pobox.suse.cz>
Date:	Fri, 22 Feb 2013 13:47:31 +0100
From:	Michal Marek <mmarek@...e.cz>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH] Kbuild: Disable var tracking with
	CONFIG_DEBUG_INFO_REDUCED

On Thu, Feb 07, 2013 at 01:58:40PM -0800, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> Newer gcc enables the var-tracking pass with -g to keep track which
> registers contain which variables. This is one of the slower passes in gcc.
> 
> With reduced debug info (aimed at objdump -S, but not using a full debugger)
> we don't need this fine grained tracking. But it was still enabled
> because -g was enabled. Disable it explicitely for DEBUG_INFO_REDUCED.

Applied to kbuild.git#kbuild, thanks.

Michal
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