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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-15 06:11:11 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-15 06:11:11 +0400
commit892d208bcf79e4e1058707786a7b6d486697cd78 (patch)
tree15446e4d19f7f98078344ab0bc37ae6af4898c6d /mm/percpu.c
parentdca88ad6915b65f6e037f8c3e632fcd92a70bd88 (diff)
parent029aeff5db879afd7760f11214b6fea45f76b58e (diff)
downloadlinux-892d208bcf79e4e1058707786a7b6d486697cd78.tar.xz
Merge tag 'kmemleak' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux
Kmemleak patches Main features: - Handle percpu memory allocations (only scanning them, not actually reporting). - Memory hotplug support. Usability improvements: - Show the origin of early allocations. - Report previously found leaks even if kmemleak has been disabled by some error. * tag 'kmemleak' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux: kmemleak: Add support for memory hotplug kmemleak: Handle percpu memory allocation kmemleak: Report previously found leaks even after an error kmemleak: When the early log buffer is exceeded, report the actual number kmemleak: Show where early_log issues come from
Diffstat (limited to 'mm/percpu.c')
-rw-r--r--mm/percpu.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/mm/percpu.c b/mm/percpu.c
index 716eb4acf2fc..f47af9123af7 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -67,6 +67,7 @@
#include <linux/spinlock.h>
#include <linux/vmalloc.h>
#include <linux/workqueue.h>
+#include <linux/kmemleak.h>
#include <asm/cacheflush.h>
#include <asm/sections.h>
@@ -710,6 +711,7 @@ static void __percpu *pcpu_alloc(size_t size, size_t align, bool reserved)
const char *err;
int slot, off, new_alloc;
unsigned long flags;
+ void __percpu *ptr;
if (unlikely(!size || size > PCPU_MIN_UNIT_SIZE || align > PAGE_SIZE)) {
WARN(true, "illegal size (%zu) or align (%zu) for "
@@ -802,7 +804,9 @@ area_found:
mutex_unlock(&pcpu_alloc_mutex);
/* return address relative to base address */
- return __addr_to_pcpu_ptr(chunk->base_addr + off);
+ ptr = __addr_to_pcpu_ptr(chunk->base_addr + off);
+ kmemleak_alloc_percpu(ptr, size);
+ return ptr;
fail_unlock:
spin_unlock_irqrestore(&pcpu_lock, flags);
@@ -916,6 +920,8 @@ void free_percpu(void __percpu *ptr)
if (!ptr)
return;
+ kmemleak_free_percpu(ptr);
+
addr = __pcpu_ptr_to_addr(ptr);
spin_lock_irqsave(&pcpu_lock, flags);
@@ -1639,6 +1645,8 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
rc = -ENOMEM;
goto out_free_areas;
}
+ /* kmemleak tracks the percpu allocations separately */
+ kmemleak_free(ptr);
areas[group] = ptr;
base = min(ptr, base);
@@ -1753,6 +1761,8 @@ int __init pcpu_page_first_chunk(size_t reserved_size,
"for cpu%u\n", psize_str, cpu);
goto enomem;
}
+ /* kmemleak tracks the percpu allocations separately */
+ kmemleak_free(ptr);
pages[j++] = virt_to_page(ptr);
}