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SubjectRe: [PATCH] mm/memcg: update page struct member in comments
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在 2020/11/7 上午4:51, Roman Gushchin 写道:
> There are "page and memcg binding" and "page's memcg" used in similar cases,
> I think it's more obvious than "page_memcg(page) being stable".
>
> Maybe it helps to address Ira's comment.
>
> Anyway, please feel free to add:
> Acked-by: Roman Gushchin <guro@fb.com>
>
> Thanks!

Thanks a lot! Roman.
here is the updated patch with your suggestion and ack.


From 0db2bd8f3833ec5e58c6978f771b05e4902e5156 Mon Sep 17 00:00:00 2001
From: Alex Shi <alex.shi@linux.alibaba.com>
Date: Fri, 6 Nov 2020 19:33:33 +0800
Subject: [PATCH v2] mm/memcg: update page struct member in comments

The page->mem_cgroup member is replaced by memcg_data, and add a helper
page_memcg() for it. Need to update comments to avoid confusing.

Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Acked-by: Roman Gushchin <guro@fb.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: cgroups@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
---
mm/memcontrol.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 7657f16cf992..b6560ab1adc4 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1330,7 +1330,7 @@ void lruvec_memcg_debug(struct lruvec *lruvec, struct page *page)
* @page: the page
* @pgdat: pgdat of the page
*
- * This function relies on page->mem_cgroup being stable - see the
+ * This function relies on page's memcg being stable - see the
* access rules in commit_charge().
*/
struct lruvec *mem_cgroup_page_lruvec(struct page *page, struct pglist_data *pgdat)
@@ -2942,7 +2942,7 @@ static void commit_charge(struct page *page, struct mem_cgroup *memcg)
{
VM_BUG_ON_PAGE(page_memcg(page), page);
/*
- * Any of the following ensures page->mem_cgroup stability:
+ * Any of the following ensures page's memcg stability:
*
* - the page lock
* - LRU isolation
--
1.8.3.1
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