linux-kernel - [patch 05/10] mm: bootmem: allocate in order node+goal, goal, node, anywhere

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Date:	Mon,  7 May 2012 13:37:47 +0200
From:	Johannes Weiner <hannes@...xchg.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Gavin Shan <shangw@...ux.vnet.ibm.com>,
	David Miller <davem@...emloft.net>,
	Yinghai Lu <yinghai@...nel.org>, Tejun Heo <tj@...nel.org>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [patch 05/10] mm: bootmem: allocate in order node+goal, goal, node, anywhere

Match the nobootmem version of __alloc_bootmem_node.  Try to satisfy
both the node and the goal, then just the goal, then just the node,
then allocate anywhere before panicking.

Signed-off-by: Johannes Weiner <hannes@...xchg.org>
---
 mm/bootmem.c |   14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/mm/bootmem.c b/mm/bootmem.c
index bafeb2c..b5babdf 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -704,6 +704,7 @@ static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata,
 {
 	void *ptr;
 
+again:
 	ptr = alloc_arch_preferred_bootmem(bdata, size, align, goal, limit);
 	if (ptr)
 		return ptr;
@@ -712,7 +713,18 @@ static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata,
 	if (ptr)
 		return ptr;
 
-	return ___alloc_bootmem(size, align, goal, limit);
+	ptr = alloc_bootmem_core(size, align, goal, limit);
+	if (ptr)
+		return ptr;
+
+	if (goal) {
+		goal = 0;
+		goto again;
+	}
+
+	printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
+	panic("Out of memory");
+	return NULL;
 }
 
 /**
-- 
1.7.10

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