linux-kernel - [PATCH 1/2] mm/page_alloc: change sysctl_lower_zone_reserve_ratio to sysctl_lowmem_reserve

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Message-Id: <1440511291-3990-1-git-send-email-bywxiaobai@163.com>
Date:	Tue, 25 Aug 2015 22:01:30 +0800
From:	Yaowei Bai <bywxiaobai@....com>
To:	akpm@...ux-foundation.org, mgorman@...e.de, vbabka@...e.cz,
	mhocko@...nel.org, js1304@...il.com, hannes@...xchg.org,
	alexander.h.duyck@...hat.com, sasha.levin@...cle.com
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] mm/page_alloc: change sysctl_lower_zone_reserve_ratio to sysctl_lowmem_reserve_ratio

We use sysctl_lowmem_reserve_ratio rather than sysctl_lower_zone_reserve_ratio to
determine how aggressive the kernel is in defending lowmem from the possibility of
being captured into pinned user memory. To avoid misleading, correct it in some
comments.

Signed-off-by: Yaowei Bai <bywxiaobai@....com>
---
 mm/page_alloc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0a0acdb..b730f7d 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6043,7 +6043,7 @@ void __init page_alloc_init(void)
 }
 
 /*
- * calculate_totalreserve_pages - called when sysctl_lower_zone_reserve_ratio
+ * calculate_totalreserve_pages - called when sysctl_lowmem_reserve_ratio
  *	or min_free_kbytes changes.
  */
 static void calculate_totalreserve_pages(void)
@@ -6087,7 +6087,7 @@ static void calculate_totalreserve_pages(void)
 
 /*
  * setup_per_zone_lowmem_reserve - called whenever
- *	sysctl_lower_zone_reserve_ratio changes.  Ensures that each zone
+ *	sysctl_lowmem_reserve_ratio changes.  Ensures that each zone
  *	has a correct pages reserved value, so an adequate number of
  *	pages are left in the zone after a successful __alloc_pages().
  */
-- 
1.9.1


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