From 996963956c2cecd0a8d2960f10711a125e775fe0 Mon Sep 17 00:00:00 2001
From: Chen Wandun <chenwandun@huawei.com>
Date: Tue, 1 Mar 2022 17:26:38 +0800
Subject: [PATCH] mm: fix page cache use reliable memory when reliable_debug=P

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4SK3S
CVE: NA

--------------------------------

If reliable_debug=P, page cache should not use reliable memory.

Fixes: f5c691902452 ("mm: add cmdline for the reliable memory usage of page cache")
Signed-off-by: Chen Wandun <chenwandun@huawei.com>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Reviewed-by: Kefeng Wang<wangkefeng.wang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 mm/mem_reliable.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mm/mem_reliable.c b/mm/mem_reliable.c
index dcdd937148b6..f27c79bbb0f4 100644
--- a/mm/mem_reliable.c
+++ b/mm/mem_reliable.c
@@ -475,6 +475,9 @@ void page_cache_prepare_alloc(gfp_t *gfp)
 	if (!mem_reliable_is_enabled())
 		return;
 
+	if (!pagecache_reliable_is_enabled())
+		goto no_reliable;
+
 	for_each_possible_cpu(cpu)
 		nr_reliable += this_cpu_read(pagecache_reliable_pages);
 
-- 
GitLab