From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1426277AbcBRM5c (ORCPT ); Thu, 18 Feb 2016 07:57:32 -0500 Received: from mail-yk0-f179.google.com ([209.85.160.179]:34282 "EHLO mail-yk0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1425461AbcBRM52 (ORCPT ); Thu, 18 Feb 2016 07:57:28 -0500 Date: Thu, 18 Feb 2016 07:57:24 -0500 From: Tejun Heo To: Nikolay Borisov Cc: Jens Axboe , Tahsin Erdogan , cgroups@vger.kernel.org, "Theodore Ts'o" , Nauman Rafique , linux-kernel@vger.kernel.org, Jan Kara Subject: Re: [PATCH block/for-4.5-fixes] writeback: keep superblock pinned during cgroup writeback association switches Message-ID: <20160218125724.GD6479@mtj.duckdns.org> References: <20160215210047.GN3965@htj.duckdns.org> <20160216182457.GO3741@mtj.duckdns.org> <56C59918.70505@kyup.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <56C59918.70505@kyup.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 18, 2016 at 12:12:40PM +0200, Nikolay Borisov wrote: > > > On 02/16/2016 08:24 PM, Tejun Heo wrote: > > Signed-off-by: Tejun Heo > > Reported-and-tested-by: Tahsin Erdogan > > Link: http://lkml.kernel.org/g/CAAeU0aNCq7LGODvVGRU-oU_o-6enii5ey0p1c26D1ZzYwkDc5A@mail.gmail.com > > Fixes: d10c80955265 ("writeback: implement foreign cgroup inode bdi_writeback switching") > > Cc: stable@vger.kernel.org #v4.5+ > > Why is this tagged for 4.5+ since the commit in question was merged in 4.2? Up until 4.5, the whole cgroup v2 interface is hidden behind a devel flag and cgroup writeback can only be used through cgroup v2. Thanks. -- tejun