linux-ext4 - Re: [PATCH cgroup/for-4.3-fixes] cgroup, writeback: don't enable cgroup writeback on traditional hierarchies

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Date:	Thu, 24 Sep 2015 11:09:46 +0300
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Theodore Ts'o <tytso@....edu>, axboe@...nel.dk,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	lizefan@...wei.com, cgroups@...r.kernel.org, hannes@...xchg.org,
	kernel-team@...com, adilger.kernel@...ger.ca,
	linux-ext4@...r.kernel.org, Dexuan Cui <decui@...rosoft.com>
Subject: Re: [PATCH cgroup/for-4.3-fixes] cgroup, writeback: don't enable
 cgroup writeback on traditional hierarchies

On Wed, 2015-09-23 at 17:07 -0400, Tejun Heo wrote:
> Hello,
> 
> So, this should make the regression go away.  It doesn't fix the
> underlying bugs but they shouldn't get triggered by people not
> experimenting with cgroup.

Tejun,

this hits the nail on the head and makes the problem go away.

I've tested the tip of Linuses tree (v4.3-rc2+) plus this patch - no
data corruption after reboots.

I've tested just the tip of Linuses tree (v4.3-rc2+) without this
patch, and I do see the data corruption after reboots.

Tested-by: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>

Artem.
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