linux-kernel - [PATCH] mm: skip reserved page for kmem leak scanning

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Date:   Fri, 26 Aug 2022 11:12:10 +0800
From:   "zhaoyang.huang" <zhaoyang.huang@...soc.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Zhaoyang Huang <huangzhaoyang@...il.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, <ke.wang@...soc.com>
Subject: [PATCH] mm: skip reserved page for kmem leak scanning

From: Zhaoyang Huang <zhaoyang.huang@...soc.com>

It is no need to scan reserved page, skip it.

Signed-off-by: Zhaoyang Huang <zhaoyang.huang@...soc.com>
---
 mm/kmemleak.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index a182f5d..c546250 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1471,7 +1471,7 @@ static void kmemleak_scan(void)
 			if (page_zone(page) != zone)
 				continue;
 			/* only scan if page is in use */
-			if (page_count(page) == 0)
+			if (page_count(page) == 0 && !PageReserved(page))
 				continue;
 			scan_block(page, page + 1, NULL);
 			if (!(pfn & 63))
-- 
1.9.1