mm: skip rss check on MM_UNRECLAIMABLE



MM_UNRECLAIMABLE rss counter can be updated by drivers
on exit_files. But since exit_mm is called early, there
is a chance of false bad rss messages. Skip the check
for MM_UNRECLAIMABLE.

Change-Id: Id9a79db20f1ae711ec801a646d7c28d92e94f70b
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>

parent aee68569

kernel/fork.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -870,7 +870,13 @@ static void check_mm(struct mm_struct *mm)
		int i;

		for (i = 0; i < NR_MM_COUNTERS; i++) {
		long x = atomic_long_read(&mm->rss_stat.count[i]);
		long x;

		/* MM_UNRECLAIMABLE could be freed later in exit_files */
		if (i == MM_UNRECLAIMABLE)
		continue;

		x = atomic_long_read(&mm->rss_stat.count[i]);

		if (unlikely(x))
		printk(KERN_ALERT "BUG: Bad rss-counter state "