diff mbox

mm: Postpone the disabling of kmemleak early logging

Message ID 1399469315-29239-1-git-send-email-catalin.marinas@arm.com
State Accepted
Commit 3551a9280bcb728980a13783ff295e9f0bdedd9a
Headers show

Commit Message

Catalin Marinas May 7, 2014, 1:28 p.m. UTC
Commit 8910ae896c8c (kmemleak: change some global variables to int), in
addition to the atomic -> int conversion, moved the kmemleak_early_log
disabling at the beginning of the kmemleak_init() function, before the
full kmemleak tracing is actually enabled. In this small window,
kmem_cache_create() is called by kmemleak which triggers additional
memory allocation that are not traced. This patch restores the original
logic with kmemleak_early_log disabling when kmemleak is fully
functional.

Fixes: 8910ae896c8c (kmemleak: change some global variables to int)
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Li Zefan <lizefan@huawei.com>
---
 mm/kmemleak.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/
diff mbox

Patch

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index 61a64ed2fbef..33599ba0cd8d 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1809,10 +1809,9 @@  void __init kmemleak_init(void)
 	int i;
 	unsigned long flags;
 
-	kmemleak_early_log = 0;
-
 #ifdef CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF
 	if (!kmemleak_skip_disable) {
+		kmemleak_early_log = 0;
 		kmemleak_disable();
 		return;
 	}
@@ -1830,6 +1829,7 @@  void __init kmemleak_init(void)
 
 	/* the kernel is still in UP mode, so disabling the IRQs is enough */
 	local_irq_save(flags);
+	kmemleak_early_log = 0;
 	if (kmemleak_error) {
 		local_irq_restore(flags);
 		return;