linux-kernel - Re: [PATCH] [20/45] x86_64: Use 8 byte stack alignment when possible

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Message-ID: <20070921211935.GW2625@devserv.devel.redhat.com>
Date:	Fri, 21 Sep 2007 17:19:35 -0400
From:	Jakub Jelinek <jakub@...hat.com>
To:	Andi Kleen <ak@...e.de>
Cc:	patches@...-64.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [20/45] x86_64: Use 8 byte stack alignment when possible

On Fri, Sep 21, 2007 at 10:45:02PM +0200, Andi Kleen wrote:
> 
> Kernel doesn't use SSE2, so it doesn't need 16 byte alignment. Also
> the stack can be already unaligned so letting the compiler align
> is useless. This may make some stack frames smaller.

Shouldn't sources that are compiled into the VDSO or VSYSCALL pages
revert this to the default?

	Jakub
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