linux-kernel - Re: [PATCH 0/12] memcg updates v5

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Date:	Fri, 26 Sep 2008 13:05:34 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Daisuke Nishimura <nishimura@....nes.nec.co.jp>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
	"xemul@...nvz.org" <xemul@...nvz.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Dave Hansen <haveblue@...ibm.com>, ryov@...inux.co.jp
Subject: Re: [PATCH 0/12] memcg updates v5

On Fri, 26 Sep 2008 12:00:19 +0900
Daisuke Nishimura <nishimura@....nes.nec.co.jp> wrote:

> I'll test it with updated version of 9-11 and report you back.
> 
Thank you. below is the new one...(Sorry!)

-Kame
==
Check LRU bit under lru_lock.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

 mm/memcontrol.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

Index: mmotm-2.6.27-rc7+/mm/memcontrol.c
===================================================================
--- mmotm-2.6.27-rc7+.orig/mm/memcontrol.c
+++ mmotm-2.6.27-rc7+/mm/memcontrol.c
@@ -340,11 +340,12 @@ void mem_cgroup_move_lists(struct page *
 	if (!trylock_page_cgroup(pc))
 		return;
 
-	if (PageCgroupUsed(pc) && PageCgroupLRU(pc)) {
+	if (PageCgroupUsed(pc)) {
 		mem = pc->mem_cgroup;
 		mz = page_cgroup_zoneinfo(pc);
 		spin_lock_irqsave(&mz->lru_lock, flags);
-		__mem_cgroup_move_lists(pc, lru);
+		if (PageCgroupLRU(pc))
+			__mem_cgroup_move_lists(pc, lru);
 		spin_unlock_irqrestore(&mz->lru_lock, flags);
 	}
 	unlock_page_cgroup(pc);
@@ -564,8 +565,8 @@ __release_page_cgroup(struct memcg_percp
 			spin_lock(&mz->lru_lock);
 		}
 		if (!PageCgroupUsed(pc) && PageCgroupLRU(pc)) {
-			__mem_cgroup_remove_list(mz, pc);
 			ClearPageCgroupLRU(pc);
+			__mem_cgroup_remove_list(mz, pc);
 		}
 	}
 	if (prev_mz)
@@ -597,8 +598,8 @@ __set_page_cgroup_lru(struct memcg_percp
 			spin_lock(&mz->lru_lock);
 		}
 		if (PageCgroupUsed(pc) && !PageCgroupLRU(pc)) {
-			SetPageCgroupLRU(pc);
 			__mem_cgroup_add_list(mz, pc);
+			SetPageCgroupLRU(pc);
 		}
 	}
 



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