From: William Lee Irwin III <wli@holomorphy.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Mikael Starvik <starvik@axis.com>,
David Howells <dhowells@redhat.com>,
Kyle McMartin <kyle@parisc-linux.org>,
Anton Blanchard <anton@samba.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Paul Mundt <lethal@linux-sh.org>,
"David S. Miller" <davem@davemloft.net>, Andi Kleen <ak@muc.de>,
Christian Zankel <chris@zankel.net>,
Philippe Elie <phil.el@wanadoo.fr>,
Nathan Scott <nathans@sgi.com>, Jens Axboe <axboe@suse.de>,
linux-arch@vger.kernel.org, Eric Dumazet <dada1@cosmosbay.com>
Subject: Re: percpu data changes
Date: Fri, 3 Feb 2006 01:36:18 -0800 [thread overview]
Message-ID: <20060203093618.GF2866@holomorphy.com> (raw)
In-Reply-To: <20060203011748.6fe3fee3.akpm@osdl.org>
On Fri, Feb 03, 2006 at 01:17:48AM -0800, Andrew Morton wrote:
> It seems that powerpc has gone and changed their implementation of percpu
> data so that there is no memory allocated for not-possible CPUs. To save a
> bit of RAM.
> This means that any code which does
>
> for (i = 0; i < NR_CPUS; i++)
> touch(percpudata(i))
> will explode on powerpc.
> I have a patch queued up (for 2.6.16) which fixes most users of percpu
> data. Make them use for_each_cpu(). I'll send that in a moment.
...
Blanket Acked-by: William Irwin <wli@holomorphy.com>
-- wli
next prev parent reply other threads:[~2006-02-03 9:37 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-03 9:17 percpu data changes Andrew Morton
2006-02-03 9:18 ` Andrew Morton
2006-02-03 9:35 ` Andrew Morton
2006-02-03 9:38 ` David S. Miller
2006-02-03 9:36 ` William Lee Irwin III [this message]
2006-02-03 9:40 ` David S. Miller
2006-02-03 9:51 ` Andi Kleen
2006-02-03 11:01 ` Eric Dumazet
2006-02-03 11:07 ` Andi Kleen
2006-02-03 15:36 ` Kyle McMartin
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