linux-kernel - [PATCH] memcg: fix mem_cgroup_rotate_reclaimable

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Date:	Mon, 28 Mar 2011 14:51:46 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Minchan Kim <minchan.kim@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Barrett <damentz@...uorix.net>,
	Ben Gamari <bgamari.foss@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mel@....ul.ie>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Nick Piggin <npiggin@...nel.dk>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: [PATCH] memcg: fix mem_cgroup_rotate_reclaimable_page

Le mardi 22 février 2011 à 00:59 +0900, Minchan Kim a écrit :
> Fixed version.
> 
> From be7d31f6e539bbad1ebedf52c6a51a4a80f7976a Mon Sep 17 00:00:00 2001
> From: Minchan Kim <minchan.kim@...il.com>
> Date: Tue, 22 Feb 2011 00:53:05 +0900
> Subject: [PATCH v7 2/3] memcg: move memcg reclaimable page into tail of inactive list
> 
> The rotate_reclaimable_page function moves just written out
> pages, which the VM wanted to reclaim, to the end of the
> inactive list.  That way the VM will find those pages first
> next time it needs to free memory.
> This patch apply the rule in memcg.
> It can help to prevent unnecessary working page eviction of memcg.
> 
> Acked-by: Balbir Singh <balbir@...ux.vnet.ibm.com>
> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> Reviewed-by: Rik van Riel <riel@...hat.com>
> Cc: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> Cc: Johannes Weiner <hannes@...xchg.org>
> Signed-off-by: Minchan Kim <minchan.kim@...il.com>
> ---

Hmm... "inline inline" is an error on some gcc versions

  CC      arch/x86/kernel/asm-offsets.s
In file included from include/linux/swap.h:8,
                 from include/linux/suspend.h:4,
                 from arch/x86/kernel/asm-offsets.c:12:
include/linux/memcontrol.h:220: error: duplicate `inline'
make[1]: *** [arch/x86/kernel/asm-offsets.s] Error 1


> +static inline inline void mem_cgroup_rotate_reclaimable_page(struct page *page)
> +{
> +	return ;
> +}
> +

[PATCH] memcg: fix mem_cgroup_rotate_reclaimable_page proto

commit 3f58a8294333 (move memcg reclaimable page into tail of inactive
list) added inline keyword twice in its prototype.

Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
Cc: Minchan Kim <minchan.kim@...il.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Balbir Singh <balbir@...ux.vnet.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc: Johannes Weiner <hannes@...xchg.org>
---

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 5a5ce70..5e9840f5 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -216,7 +216,7 @@ static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
 	return ;
 }
 
-static inline inline void mem_cgroup_rotate_reclaimable_page(struct page *page)
+static inline void mem_cgroup_rotate_reclaimable_page(struct page *page)
 {
 	return ;
 }


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