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From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: "akpm@linux-foundation.org" <akpm@linux-foundation.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"hannes@cmpxchg.org" <hannes@cmpxchg.org>,
	"nishimura@mxp.nes.nec.co.jp" <nishimura@mxp.nes.nec.co.jp>,
	"balbir@linux.vnet.ibm.com" <balbir@linux.vnet.ibm.com>,
	Greg Thelen <gthelen@google.com>
Subject: [PATCH 0/4] fix THP and memcg issues v2.
Date: Tue, 18 Jan 2011 11:06:04 +0900	[thread overview]
Message-ID: <20110118110604.e2528324.kamezawa.hiroyu@jp.fujitsu.com> (raw)


Now, when THP is enabled, memcg's counter goes wrong. Moreover, rmdir()
may not end. I fixed some races since v1.


This series is a fix for obviouse counter breakage. When you test,
CONFIG_TRANSPARENT_HUGEPAGE=y
CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y

is appreciated. Tests should be done is:

# mount -t cgroup none /cgroup/memory -omemory
# mkdir /cgroup/memory/A
# mkdir /cgroup/memory/A/B
# run some programs under B.
# echo 0 > /cgroup/memory/A/B/memory.force_empty

and check B's memory.stat shows RSS/CACHE/LRU are all 0.
Moving tasks while running is another good test.

I know there are another problem when memory cgroup hits limit and
reclaim in busy. But I will fix it in another patch.

Thanks,
-Kame

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             reply	other threads:[~2011-01-18  2:12 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-01-18  2:06 KAMEZAWA Hiroyuki [this message]
2011-01-18  2:07 ` [PATCH 1/4] modify accounting function for supporting THP better KAMEZAWA Hiroyuki
2011-01-18  2:10 ` [PATCH 2/4] memcg: fixe USED bit handling at uncharge with THP KAMEZAWA Hiroyuki
2011-01-18  2:15   ` [PATCH 4/4] memcg: fix rmdir, force_empty " KAMEZAWA Hiroyuki
2011-01-18  2:14 ` [PATCH 3/4] memcg: fix LRU accounting " KAMEZAWA Hiroyuki
2011-01-18  2:31 ` [PATCH 0/4] fix THP and memcg issues v2 KAMEZAWA Hiroyuki

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