From: Andi Kleen <ak@suse.de>
To: Zwane Mwaikambo <zwane@arm.linux.org.uk>
Cc: Andrew Morton <akpm@osdl.org>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Andi Kleen <ak@suse.de>
Subject: Re: [PATCH] i386 boottime for_each_cpu broken
Date: Thu, 11 Aug 2005 12:54:10 +0200 [thread overview]
Message-ID: <20050811105409.GI8974@wotan.suse.de> (raw)
In-Reply-To: <Pine.LNX.4.61.0508102220070.16483@montezuma.fsmlabs.com>
On Wed, Aug 10, 2005 at 10:59:28PM -0600, Zwane Mwaikambo wrote:
> for_each_cpu walks through all processors in cpu_possible_map, which is
> defined as cpu_callout_map on i386 and isn't initialised until all
> processors have been booted. This breaks things which do for_each_cpu
> iterations early during boot. So, define cpu_possible_map as a bitmap with
> NR_CPUS bits populated. This was triggered by a patch i'm working on which
> does alloc_percpu before bringing up secondary processors.
Better is to initialize it in mpparse.c. That is what x86-64 is doing now.
-Andi
next prev parent reply other threads:[~2005-08-11 10:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-11 4:59 Zwane Mwaikambo
2005-08-11 6:41 ` Bharata B Rao
2005-08-11 21:33 ` Zwane Mwaikambo
2005-08-11 10:54 ` Andi Kleen [this message]
2005-08-11 17:44 ` Zwane Mwaikambo
[not found] <200509050815.j858FLxR027791@hera.kernel.org>
2005-09-09 7:26 ` Andrew Morton
2005-09-09 7:43 ` Zwane Mwaikambo
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