forked from luck/tmp_suning_uos_patched
kmemleak: Slightly change the policy on newly allocated objects
Newly allocated objects are more likely to be reported as false positives. Kmemleak ignores the reporting of objects younger than 5 seconds. However, this age was calculated after the memory scanning completed which usually takes longer than 5 seconds. This patch make the minimum object age calculation in relation to the start of the memory scanning. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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@ -190,7 +190,9 @@ static unsigned long max_addr;
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static unsigned long next_scan_yield;
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static struct task_struct *scan_thread;
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static unsigned long jiffies_scan_yield;
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/* used to avoid reporting of recently allocated objects */
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static unsigned long jiffies_min_age;
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static unsigned long jiffies_last_scan;
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/* delay between automatic memory scannings */
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static signed long jiffies_scan_wait;
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/* enables or disables the task stacks scanning */
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@ -284,7 +286,8 @@ static int color_gray(const struct kmemleak_object *object)
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static int unreferenced_object(struct kmemleak_object *object)
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{
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return (object->flags & OBJECT_ALLOCATED) && color_white(object) &&
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time_is_before_eq_jiffies(object->jiffies + jiffies_min_age);
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time_before_eq(object->jiffies + jiffies_min_age,
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jiffies_last_scan);
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}
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/*
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@ -927,6 +930,8 @@ static void kmemleak_scan(void)
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int i;
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int new_leaks = 0;
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jiffies_last_scan = jiffies;
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/* prepare the kmemleak_object's */
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rcu_read_lock();
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list_for_each_entry_rcu(object, &object_list, object_list) {
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