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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>
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2 changed files with 5 additions and 3 deletions
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@ -414,7 +414,7 @@ config SLUB_STATS
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config DEBUG_KMEMLEAK
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bool "Kernel memory leak detector"
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depends on DEBUG_KERNEL && EXPERIMENTAL && !MEMORY_HOTPLUG && \
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depends on DEBUG_KERNEL && EXPERIMENTAL && \
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(X86 || ARM || PPC || MIPS || S390 || SPARC64 || SUPERH || MICROBLAZE || TILE)
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select DEBUG_FS
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@ -100,6 +100,7 @@
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#include <linux/kmemcheck.h>
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#include <linux/kmemleak.h>
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#include <linux/memory_hotplug.h>
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/*
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* Kmemleak configuration and common defines.
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@ -1292,9 +1293,9 @@ static void kmemleak_scan(void)
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#endif
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/*
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* Struct page scanning for each node. The code below is not yet safe
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* with MEMORY_HOTPLUG.
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* Struct page scanning for each node.
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*/
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lock_memory_hotplug();
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for_each_online_node(i) {
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pg_data_t *pgdat = NODE_DATA(i);
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unsigned long start_pfn = pgdat->node_start_pfn;
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@ -1313,6 +1314,7 @@ static void kmemleak_scan(void)
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scan_block(page, page + 1, NULL, 1);
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}
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}
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unlock_memory_hotplug();
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/*
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* Scanning the task stacks (may introduce false negatives).
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