From: Andi Kleen <andi@firstfloor.org>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andi Kleen <andi@firstfloor.org>,
Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
"H. Peter Anvin" <hpa@zytor.com>,
Chuck Ebbert <cebbert@redhat.com>,
Christoph Hellwig <hch@infradead.org>
Subject: Re: [patch 4/7] Immediate Values - i386 Optimization
Date: Wed, 19 Sep 2007 00:44:44 +0200 [thread overview]
Message-ID: <20070918224444.GC5773@one.firstfloor.org> (raw)
In-Reply-To: <46F0515E.2010608@goop.org>
On Tue, Sep 18, 2007 at 03:29:50PM -0700, Jeremy Fitzhardinge wrote:
> Andi Kleen wrote:
> > Jeremy Fitzhardinge <jeremy@goop.org> writes:
> >
> >> It's a pity that gas seems to generate plain 0x90 nops rather than
> >> long-nop forms here. I thought it could do that.
> >>
> >
> > .p2align does it
>
> Just .p2align? Not align, balign, org or skip? Seems... strange.
The problem is that you cannot always safely jump into the middle of the
longer form nops. So I suppose they didn't risk breakage on older
code relying on this.
-Andi
next prev parent reply other threads:[~2007-09-18 22:45 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-18 21:07 [patch 0/7] Immediate Values for 2.6.23-rc6-mm1 Mathieu Desnoyers
2007-09-18 21:07 ` [patch 1/7] Immediate Values - Architecture Independent Code Mathieu Desnoyers
2007-09-18 21:07 ` [patch 2/7] Immediate Values - Kconfig menu in EMBEDDED Mathieu Desnoyers
2007-09-18 22:02 ` Randy Dunlap
2007-09-19 11:13 ` Mathieu Desnoyers
2007-09-18 21:07 ` [patch 3/7] Immediate Values - Move Kprobes i386 restore_interrupt to kdebug.h Mathieu Desnoyers
2007-09-18 21:07 ` [patch 4/7] Immediate Values - i386 Optimization Mathieu Desnoyers
2007-09-18 21:51 ` Jeremy Fitzhardinge
2007-09-18 22:12 ` H. Peter Anvin
2007-09-18 22:27 ` Jeremy Fitzhardinge
2007-09-19 13:01 ` Mathieu Desnoyers
2007-09-19 16:03 ` Mathieu Desnoyers
2007-09-19 16:12 ` H. Peter Anvin
2007-09-19 17:30 ` Jeremy Fitzhardinge
2007-09-19 17:39 ` H. Peter Anvin
2007-09-19 18:31 ` Mathieu Desnoyers
2007-09-19 18:22 ` Mathieu Desnoyers
2007-10-20 16:47 ` Mathieu Desnoyers
2007-10-20 18:32 ` H. Peter Anvin
2007-10-22 15:40 ` Mathieu Desnoyers
2007-10-22 16:39 ` H. Peter Anvin
2007-10-22 9:53 ` Andi Kleen
2007-09-19 11:00 ` Mathieu Desnoyers
2007-09-18 22:14 ` Andi Kleen
2007-09-18 22:29 ` Jeremy Fitzhardinge
2007-09-18 22:33 ` H. Peter Anvin
2007-09-18 22:44 ` Andi Kleen [this message]
2007-09-19 11:08 ` Mathieu Desnoyers
2007-09-19 11:14 ` Andi Kleen
2007-09-19 10:59 ` Mathieu Desnoyers
2007-09-20 10:24 ` Denys Vlasenko
2007-09-21 13:31 ` Mathieu Desnoyers
2007-09-18 21:07 ` [patch 5/7] Immediate Values - Powerpc Optimization Mathieu Desnoyers
2007-09-18 21:07 ` [patch 6/7] Immediate Values - Documentation Mathieu Desnoyers
2007-09-18 21:07 ` [patch 7/7] Scheduler Profiling - Use Immediate Values Mathieu Desnoyers
-- strict thread matches above, loose matches on Subject: below --
2007-09-17 18:42 [patch 0/7] " Mathieu Desnoyers
2007-09-17 18:42 ` [patch 4/7] Immediate Values - i386 Optimization Mathieu Desnoyers
2007-09-18 6:04 ` Borislav Petkov
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