linux-kernel - Re: [PATCH 2/2] ext4: implement cgroup writeback support

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Date:	Wed, 23 Sep 2015 16:50:53 +0300
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Theodore Ts'o <tytso@....edu>, Tejun Heo <tj@...nel.org>
Cc:	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
Subject: Re: [PATCH 2/2] ext4: implement cgroup writeback support

On Wed, 2015-09-23 at 15:49 +0300, Artem Bityutskiy wrote:
> On Tue, 2015-07-21 at 23:56 -0400, Theodore Ts'o wrote:
> > > v2: Updated for MS_CGROUPWB -> SB_I_CGROUPWB.
> > > 
> > > Signed-off-by: Tejun Heo <tj@...nel.org>
> > > Cc: "Theodore Ts'o" <tytso@....edu>
> > > Cc: Andreas Dilger <adilger.kernel@...ger.ca>
> > > Cc: linux-ext4@...r.kernel.org
> > 
> > Thanks, applied.
> 
> Hi, this patch introduces a regression - a major one, I'd say.
> 
> Symptoms: copy a bunch of file, run sync, then run 'reboot', and
> after
> you boot up the copied files are corrupted. So basically the user
> -visible symptom is that 'sync' does not work.

Just FYI, this is the issue I briefly reported last Fri:

https://lkml.org/lkml/2015/9/18/640

Artem.
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