linux-kernel - [PATCH next-akpm] mm/memcg: remove incorrect comments

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Message-Id: <1605864930-49405-1-git-send-email-alex.shi@linux.alibaba.com>
Date:   Fri, 20 Nov 2020 17:35:30 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        cgroups@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH next-akpm] mm/memcg: remove incorrect comments

Swapcache readahead pages are charged before get used, so it unlikely be
migrated before charged. remove the incorrect comments.

Signed-off-by: Alex Shi <alex.shi@...ux.alibaba.com>
Cc: Johannes Weiner <hannes@...xchg.org> 
Cc: Michal Hocko <mhocko@...nel.org> 
Cc: Vladimir Davydov <vdavydov.dev@...il.com> 
Cc: Andrew Morton <akpm@...ux-foundation.org> 
Cc: cgroups@...r.kernel.org 
Cc: linux-mm@...ck.org 
Cc: linux-kernel@...r.kernel.org 
---
 mm/memcontrol.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 45465c03a8d7..08c267305725 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6941,7 +6941,6 @@ void mem_cgroup_migrate(struct page *oldpage, struct page *newpage)
 	if (page_memcg(newpage))
 		return;
 
-	/* Swapcache readahead pages can get replaced before being charged */
 	memcg = page_memcg(oldpage);
 	VM_WARN_ON_ONCE_PAGE(!memcg, oldpage);
 	if (!memcg)
-- 
2.29.GIT