linux-kernel - Re: [mmotm][BUG] free is bigger than presnet Re: mmotm 2009-08-27-16-51 uploaded

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Message-ID: <Pine.LNX.4.64.0909011031140.13740@sister.anvils>
Date:	Tue, 1 Sep 2009 10:33:31 +0100 (BST)
From:	Hugh Dickins <hugh.dickins@...cali.co.uk>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [mmotm][BUG] free is bigger than presnet Re: mmotm 2009-08-27-16-51
 uploaded

On Tue, 1 Sep 2009, KAMEZAWA Hiroyuki wrote:
> 
> I'm not digggin so much but /proc/meminfo corrupted.
> 
> [kamezawa@...extal cgroup]$ cat /proc/meminfo
> MemTotal:       24421124 kB
> MemFree:        38314388 kB

If that's without my fix to shrink_active_list(), I'd try again with.
Hugh

[PATCH mmotm] vmscan move pgdeactivate modification to shrink_active_list fix

mmotm 2009-08-27-16-51 lets the OOM killer loose on my loads even
quicker than last time: one bug fixed but another bug introduced.
vmscan-move-pgdeactivate-modification-to-shrink_active_list.patch
forgot to add NR_LRU_BASE to lru index to make zone_page_state index.

Signed-off-by: Hugh Dickins <hugh.dickins@...cali.co.uk>
---

 mm/vmscan.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- mmotm/mm/vmscan.c	2009-08-28 10:07:57.000000000 +0100
+++ linux/mm/vmscan.c	2009-08-28 18:30:33.000000000 +0100
@@ -1381,8 +1381,10 @@ static void shrink_active_list(unsigned
 	reclaim_stat->recent_rotated[file] += nr_rotated;
 	__count_vm_events(PGDEACTIVATE, nr_deactivated);
 	__mod_zone_page_state(zone, NR_ISOLATED_ANON + file, -nr_taken);
-	__mod_zone_page_state(zone, LRU_ACTIVE + file * LRU_FILE, nr_rotated);
-	__mod_zone_page_state(zone, LRU_BASE + file * LRU_FILE, nr_deactivated);
+	__mod_zone_page_state(zone, NR_ACTIVE_ANON + file * LRU_FILE,
+							nr_rotated);
+	__mod_zone_page_state(zone, NR_INACTIVE_ANON + file * LRU_FILE,
+							nr_deactivated);
 	spin_unlock_irq(&zone->lru_lock);
 }
 
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