linux-kernel - [PATCH] [2/4] SLAB: Separate node initialization into separate function

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Date:	Thu, 11 Feb 2010 21:54:02 +0100 (CET)
From:	Andi Kleen <andi@...stfloor.org>
To:	penberg@...helsinki.fi, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, haicheng.li@...el.com, rientjes@...gle.com
Subject: [PATCH] [2/4] SLAB: Separate node initialization into separate function


No functional changes.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 mm/slab.c |   34 +++++++++++++++++++++-------------
 1 file changed, 21 insertions(+), 13 deletions(-)

Index: linux-2.6.32-memhotadd/mm/slab.c
===================================================================
--- linux-2.6.32-memhotadd.orig/mm/slab.c
+++ linux-2.6.32-memhotadd/mm/slab.c
@@ -1158,19 +1158,9 @@ free_array_cache:
 	}
 }
 
-static int __cpuinit cpuup_prepare(long cpu)
+static int slab_node_prepare(int node)
 {
 	struct kmem_cache *cachep;
-	struct kmem_list3 *l3 = NULL;
-	int node = cpu_to_node(cpu);
-	const int memsize = sizeof(struct kmem_list3);
-
-	/*
-	 * We need to do this right in the beginning since
-	 * alloc_arraycache's are going to use this list.
-	 * kmalloc_node allows us to add the slab to the right
-	 * kmem_list3 and not this cpu's kmem_list3
-	 */
 
 	list_for_each_entry(cachep, &cache_chain, next) {
 		/*
@@ -1179,9 +1169,10 @@ static int __cpuinit cpuup_prepare(long
 		 * node has not already allocated this
 		 */
 		if (!cachep->nodelists[node]) {
-			l3 = kmalloc_node(memsize, GFP_KERNEL, node);
+			struct kmem_list3 *l3;
+			l3 = kmalloc_node(sizeof(struct kmem_list3), GFP_KERNEL, node);
 			if (!l3)
-				goto bad;
+				return -1;
 			kmem_list3_init(l3);
 			l3->next_reap = jiffies + REAPTIMEOUT_LIST3 +
 			    ((unsigned long)cachep) % REAPTIMEOUT_LIST3;
@@ -1200,6 +1191,23 @@ static int __cpuinit cpuup_prepare(long
 			cachep->batchcount + cachep->num;
 		spin_unlock_irq(&cachep->nodelists[node]->list_lock);
 	}
+	return 0;
+}
+
+static int __cpuinit cpuup_prepare(long cpu)
+{
+	struct kmem_cache *cachep;
+	struct kmem_list3 *l3 = NULL;
+	int node = cpu_to_node(cpu);
+
+	/*
+	 * We need to do this right in the beginning since
+	 * alloc_arraycache's are going to use this list.
+	 * kmalloc_node allows us to add the slab to the right
+	 * kmem_list3 and not this cpu's kmem_list3
+	 */
+	if (slab_node_prepare(node) < 0)
+		goto bad;
 
 	/*
 	 * Now we can go ahead with allocating the shared arrays and
--
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