linux-kernel - Re: mm: Do not iterate over NR_CPUS in __zone_pcp

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Message-ID: <alpine.DEB.2.00.1003091454210.28897@router.home>
Date:	Tue, 9 Mar 2010 14:55:39 -0600 (CST)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	"Robert P. J. Day" <rpjday@...shcourse.ca>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
	Pekka Enberg <penberg@...helsinki.fi>
Subject: Re: mm: Do not iterate over NR_CPUS in __zone_pcp_update()

On Tue, 9 Mar 2010, Robert P. J. Day wrote:

> > I'm having trouble working out whether we want to backport this into
> > 2.6.33.x or earlier.  Help?
>
>   given the above aesthetic mod, shouldn't that same change be applied
> to *all* explicit loops of that form?  after all, checkpatch.pl warns
> against it:

The number of NR_CPUS should be significantly less after the percpu
rework. Would you audit the kernel for NR_CPUS use?

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