From: Andi Kleen <ak@suse.de>
To: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: Re: [PATCH] x86: Add portable getcpu call
Date: Wed, 27 Sep 2006 14:43:39 +0200 [thread overview]
Message-ID: <200609271443.39233.ak@suse.de> (raw)
In-Reply-To: <20060927123959.GC6872@osiris.boeblingen.de.ibm.com>
On Wednesday 27 September 2006 14:39, Heiko Carstens wrote:
> > > So this means that the contents of getcpu_cache will look completely
> > > different if a process runs in 32bit mode or 64bit mode. Even if you're
> > > saying "user programs should not..." this looks odd to me.
> > > Is this really on purpose and do you really think that no user space
> > > application will ever rely on the format of getcpu_cache?
> >
> > The vsyscalls do, but if anything else does it deserves breaking.
> > In the user headers it will also be just a array blob.
>
> Ah, ok. The blob thing is the part I missed then.
Hmm, perhaps it's better to do that in the standard kernel headers.
-Andi
prev parent reply other threads:[~2006-09-27 12:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200609262300.k8QN06dD013707@hera.kernel.org>
2006-09-27 11:37 ` [PATCH] x86: Add portable getcpu call Heiko Carstens
2006-09-27 12:04 ` Andi Kleen
2006-09-27 12:39 ` Heiko Carstens
2006-09-27 12:43 ` Andi Kleen [this message]
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