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authorLaura Abbott <lauraa@codeaurora.org>2011-11-15 23:49:09 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2011-12-02 16:12:42 +0000
commit029aeff5db879afd7760f11214b6fea45f76b58e (patch)
treedeac6984f163841a7996d7a8f39db49f66684c72 /mm/kmemleak.c
parentf528f0b8e53d73b18be71e96693cfab9322f33c7 (diff)
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kmemleak: Add support for memory hotplug
Ensure that memory hotplug can co-exist with kmemleak by taking the hotplug lock before scanning the memory banks. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'mm/kmemleak.c')
-rw-r--r--mm/kmemleak.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 15c50302ff93..c833addd94d7 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -100,6 +100,7 @@
#include <linux/kmemcheck.h>
#include <linux/kmemleak.h>
+#include <linux/memory_hotplug.h>
/*
* Kmemleak configuration and common defines.
@@ -1292,9 +1293,9 @@ static void kmemleak_scan(void)
#endif
/*
- * Struct page scanning for each node. The code below is not yet safe
- * with MEMORY_HOTPLUG.
+ * Struct page scanning for each node.
*/
+ lock_memory_hotplug();
for_each_online_node(i) {
pg_data_t *pgdat = NODE_DATA(i);
unsigned long start_pfn = pgdat->node_start_pfn;
@@ -1313,6 +1314,7 @@ static void kmemleak_scan(void)
scan_block(page, page + 1, NULL, 1);
}
}
+ unlock_memory_hotplug();
/*
* Scanning the task stacks (may introduce false negatives).