linux-kernel - Re: Please revert 4fd466eb46a6 ("HWPOISON: add memory cgroup filter")

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Message-ID: <20140128215632.GB16060@mtj.dyndns.org>
Date:	Tue, 28 Jan 2014 16:56:32 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Li Zefan <lizefan@...wei.com>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.cz>,
	Balbir Singh <bsingharora@...il.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	cgroups@...r.kernel.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, gong.chen@...ux.intel.com
Subject: Re: Please revert 4fd466eb46a6 ("HWPOISON: add memory cgroup filter")

On Tue, Jan 28, 2014 at 10:53:17PM +0100, Andi Kleen wrote:
> On Tue, Jan 28, 2014 at 04:45:24PM -0500, Tejun Heo wrote:
> > Hello, Andi, Wu.
> > 
> > Can you guys please revert 4fd466eb46a6 ("HWPOISON: add memory cgroup
> > filter"), which reaches into cgroup to extract the inode number and
> > uses that for filtering?  Nobody outside cgroup proper should be
> 
> Our test suite relies on it.

Hmmm?  Ooh, I thought this just went in during this -rc1 window.  This
was way back in 2009.  I suppose cgroup should expose an interface to
query inode then.  inos changing across remounts should be okay,
right?

Thanks.

-- 
tejun
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