From: "H. Peter Anvin" <hpa@zytor.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: "H.J. Lu" <hjl.tools@gmail.com>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: PATCH] Use -mpreferred-stack-boundary=3 on x86-64 if supported
Date: Sat, 23 Jun 2012 12:45:57 -0700 [thread overview]
Message-ID: <7d9b7b08-77e8-4757-b8fb-f42ba53bded4@email.android.com> (raw)
In-Reply-To: <20120623192704.GT11413@one.firstfloor.org>
Yes, it didn't work on 64 bits until now.
Andi Kleen <andi@firstfloor.org> wrote:
>On Sat, Jun 23, 2012 at 09:17:06AM -0700, H. Peter Anvin wrote:
>> To keep gcc from paddong the stack to maintain a nonexistent
>alignment.
>
>
>Ah ok. 3 instead of 4.
>
>I thought i had done that a long time ago, but now it somehow
>only seems to be there for 32bit.
>
>Makes sense.
>
>-Andi
--
Sent from my mobile phone. Please excuse brevity and lack of formatting.
next prev parent reply other threads:[~2012-06-23 19:46 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-23 16:06 H.J. Lu
2012-06-23 16:13 ` Andi Kleen
2012-06-23 16:17 ` H. Peter Anvin
2012-06-23 16:49 ` H.J. Lu
2012-06-23 22:57 ` Randy Dunlap
2012-06-23 19:27 ` Andi Kleen
2012-06-23 19:45 ` H. Peter Anvin [this message]
2012-06-24 3:13 ` [tip:x86/build] x86-64, gcc: Use -mpreferred-stack-boundary= 3 " tip-bot for H.J. Lu
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