linux-kernel - [SLUB] change kmem_cache->align to record the real alignment

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Message-Id: <1248924491.2560.725.camel@ymzhang>
Date:	Thu, 30 Jul 2009 11:28:11 +0800
From:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	Christoph Lameter <cl@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [SLUB] change kmem_cache->align to record the real alignment

kmem_cache->align records the original align parameter value specified
by users. Function calculate_alignment might change it based on cache
line size. So change kmem_cache->align correspondingly.

Signed-off-by: Zhang Yanmin <yanmin_zhang@...ux.intel.com>

---

--- linux-2.6.31-rc3/mm/slub.c	2009-07-20 00:29:39.000000000 +0800
+++ linux-2.6.31-rc3_slubalign/mm/slub.c	2009-07-30 01:19:29.000000000 +0800
@@ -2400,6 +2400,7 @@ static int calculate_sizes(struct kmem_c
 	 * on bootup.
 	 */
 	align = calculate_alignment(flags, align, s->objsize);
+	s->align = align;
 
 	/*
 	 * SLUB stores one object immediately after another beginning from


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