linux-kernel - Re: [PATCH core/percpu] percpu: fix too low alignment restriction on UP

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Message-ID: <20090226032618.GC22223@elte.hu>
Date:	Thu, 26 Feb 2009 04:26:18 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Tejun Heo <tj@...nel.org>
Cc:	Yinghai Lu <yinghai@...nel.org>, rusty@...tcorp.com.au,
	tglx@...utronix.de, x86@...nel.org, linux-kernel@...r.kernel.org,
	hpa@...or.com, jeremy@...p.org, cpw@....com,
	nickpiggin@...oo.com.au, ink@...assic.park.msu.ru
Subject: Re: [PATCH core/percpu] percpu: fix too low alignment restriction
	on UP


* Tejun Heo <tj@...nel.org> wrote:

> UP __alloc_percpu() triggered WARN_ON_ONCE() if the requested
> alignment is larger than that of unsigned long long, which is too
> small for all the cacheline aligned allocations.  Bump it up to
> SMP_CACHE_BYTES which kmalloc allocations generally guarantee.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Reported-by: Ingo Molnar <mingo@...e.hu>
> ---
> Hello, Ingo.
> 
> I somehow completely forgot about testing UP.  Sorry about that. :-)
> The following patch should do it.  Also available in the #tj-percpu
> tree.

Pulled into tip:core/percpu, thanks Tejun!

	Ingo
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