linux-kernel - [PATCH] SLUB: use page allocator for PAGE

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Date:	Sat, 22 Nov 2008 13:32:31 +0100
From:	Vegard Nossum <vegard.nossum@...il.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	Mel Gorman <mel@....ul.ie>,
	Christoph Lameter <cl@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] SLUB: use page allocator for PAGE_SIZE requests

>From 4d526db4781aaab86cb79ff8135bb0e2bc560598 Mon Sep 17 00:00:00 2001
From: Vegard Nossum <vegard.nossum@...il.com>
Date: Sat, 22 Nov 2008 13:27:54 +0100
Subject: [PATCH] SLUB: use page allocator for PAGE_SIZE requests

It seems strange that we should use the page allocator for
requests of (PAGE_SIZE + 1) bytes or more, and not for requests
that are exactly PAGE_SIZE.

Cc: Pekka Enberg <penberg@...helsinki.fi>
Cc: Mel Gorman <mel@....ul.ie>
Cc: Christoph Lameter <cl@...ux-foundation.org>
Signed-off-by: Vegard Nossum <vegard.nossum@...il.com>
---
 include/linux/slub_def.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 2f5c16b..62ce0dc 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -212,7 +212,7 @@ static __always_inline void *kmalloc_large(size_t size, gfp_t flags)
 static __always_inline void *kmalloc(size_t size, gfp_t flags)
 {
 	if (__builtin_constant_p(size)) {
-		if (size > PAGE_SIZE)
+		if (size >= PAGE_SIZE)
 			return kmalloc_large(size, flags);
 
 		if (!(flags & SLUB_DMA)) {
-- 
1.5.6.5

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