linux-kernel - Re: [discuss] [PATCH] x86-64: memset optimization

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Message-ID: <20070820181657.GO16680@bingen.suse.de>
Date:	Mon, 20 Aug 2007 20:16:57 +0200
From:	Andi Kleen <ak@...e.de>
To:	Roland Dreier <rdreier@...co.com>
Cc:	Arjan van de Ven <arjan@...radead.org>, discuss@...-64.org,
	jh@...e.cz, Stephen Hemminger <shemminger@...ux-foundation.org>,
	Andi Kleen <ak@...e.de>, linux-kernel@...r.kernel.org
Subject: Re: [discuss] [PATCH] x86-64: memset optimization

> so the code gets bigger and worse in every way.

I guess it would make sense to file this as a bug in the gcc
bugzilla

Another useful enhancement might be to have a -finline-string-functions
or similar that could be set with -Os. In general I've been wondering
for some time if the kernel really doesn't need some new optimization
setting somewhere between -Os and -O2. -Os occasionally has a few other 
bad side effects too.

-Andi
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