linux-kernel - Re: [patch 3/4] cpu alloc: The allocator

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Date:	Fri, 19 Sep 2008 12:00:53 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Eric Dumazet <dada1@...mosbay.com>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, jeremy@...p.org, ebiederm@...ssion.com,
	travis@....com, herbert@...dor.apana.org.au, xemul@...nvz.org,
	penberg@...helsinki.fi
Subject: Re: [patch 3/4] cpu alloc: The allocator

Completely wrong. We need this patch that Eric suggested:


Subject: cpu_alloc: Allow alignment < UNIT_SIZE

Limit the minimum alignment to UNIT_SIZE.

Signed-off-by: Christoph Lameter <cl@...ux-foundation.org>

Index: linux-2.6/mm/cpu_alloc.c
===================================================================
--- linux-2.6.orig/mm/cpu_alloc.c	2008-09-19 11:47:30.000000000 -0500
+++ linux-2.6/mm/cpu_alloc.c	2008-09-19 11:56:47.000000000 -0500
@@ -86,6 +86,9 @@

 	WARN_ON(align > PAGE_SIZE);

+	if (align < UNIT_SIZE)
+		align = UNIT_SIZE;
+
 	spin_lock_irqsave(&cpu_alloc_map_lock, flags);

 	first = 1
--
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