From: Tejun Heo <tj@kernel.org>
To: Tony Vroon <tony@linx.net>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
Rusty Russell <rusty@rustcorp.com.au>,
Christoph Lameter <cl@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>, "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH] percpu: fix unit_map[] verification in pcpu_setup_first_chunk()
Date: Tue, 29 Sep 2009 09:15:19 +0900 [thread overview]
Message-ID: <4AC15197.9010105@kernel.org> (raw)
In-Reply-To: <1254175662.2783.1.camel@localhost>
Tony Vroon wrote:
> On Tue, 2009-09-29 at 01:19 +0900, Tejun Heo wrote:
>> pcpu_setup_first_chunk() incorrectly used NR_CPUS as the impossible
>> unit number while unit number can equal and go over NR_CPUS with
>> sparse unit map. This triggers BUG_ON() spuriously on machines which
>> have non-power-of-two number of cpus. Use UINT_MAX instead.
>>
>> Signed-off-by: Tejun Heo <tj@kernel.org>
>> Reported-by: Tony Vroon <tony@linx.net>
> Tested-by: Tony Vroon <tony@linx.net>
>
>> Erghh... stupid mistake. This should fix it. Can you please verify?
>
> Confirmed fixed. Thank you Tejun.
Thank you. Will push out later today.
--
tejun
prev parent reply other threads:[~2009-09-29 0:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-24 0:53 [PATCH] percpu: make pcpu_setup_first_chunk() failures more verbose Tejun Heo
2009-09-24 12:49 ` [PATCH] percpu: make allocation " Tejun Heo
2009-09-27 12:49 ` 2.6.31-09194-g0d9df25 Early boot exception Tony Vroon
2009-09-28 16:19 ` [PATCH] percpu: fix unit_map[] verification in pcpu_setup_first_chunk() Tejun Heo
2009-09-28 16:25 ` Christoph Lameter
2009-09-28 16:35 ` Tejun Heo
2009-09-28 16:38 ` Tejun Heo
2009-09-28 16:40 ` Christoph Lameter
2009-09-28 16:53 ` Tejun Heo
2009-09-28 22:07 ` Tony Vroon
2009-09-29 0:15 ` Tejun Heo [this message]
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