linux-kernel - Re: [PATCH] alpha: link failure fix

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Message-ID: <20080624123645.GA5237@jurassic.park.msu.ru>
Date:	Tue, 24 Jun 2008 16:36:45 +0400
From:	Ivan Kokshaysky <ink@...assic.park.msu.ru>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Richard Henderson <rth@...ddle.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] alpha: link failure fix

On Sat, Jun 21, 2008 at 10:17:42PM +0200, Sam Ravnborg wrote:
> Most other architectures would only notice when the exit function
> is called because they do late discardning og the exit section.
> alpha (and sparc) are some of the few architectures that discard exit
> section at link time thus you will see this much sooner
> than the others.

Ah, indeed. Then it's not so critical on x86 and others.

> Are the any size penalties here?

Just checked: quite the contrary, on alpha with -fno-jump-tables
resulting kernel image is a few kilobytes smaller (~17Kb in my config,
vmlinux is ~5Mb).

> I assume there are a minimal performance penalty.

Yeah, I don't think there are lots of big switch statements in the
hot paths.

Ivan.
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