linux-kernel - Re: [PATCHSET v2 block/for-4.2/writeback] cgroup, writeback: misc updates for cgroup writeback support

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Date:	Wed, 17 Jun 2015 14:31:03 -0400
From:	Tejun Heo <tj@...nel.org>
To:	axboe@...nel.dk
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	lizefan@...wei.com, cgroups@...r.kernel.org, hannes@...xchg.org,
	kernel-team@...com
Subject: Re: [PATCHSET v2 block/for-4.2/writeback] cgroup, writeback: misc
 updates for cgroup writeback support

On Tue, Jun 16, 2015 at 06:48:29PM -0400, Tejun Heo wrote:
> Hello,
> 
> This is v2.  The only change from the last take[L] is
> 
> * super_block->s_iflags added and MS_CGROUPWB replaced with
>   SB_I_CGROUPWB as suggested by Christoph and Jan.
> 
> This patchset contains the following assorted updates for the cgroup
> writeback support.
> 
>  0001-writeback-do-foreign-inode-detection-iff-cgroup-writ.patch
>  0002-vfs-writeback-replace-FS_CGROUP_WRITEBACK-with-SB_I_.patch
>  0003-writeback-blkio-add-documentation-for-cgroup-writeba.patch
> 
> 0001 fixes a bug where clear FS_CGROUP_WRITEBACK flag didn't fully
> disable cgroup writeback support if the filesystem code uses
> wbc_init_bio() and wbc_account_io().
> 
> 0002 replaces FS_CGROUP_WRITEBACK with SB_I_CGROUPWB so that cgroup
> writeback support can be enabled / disabled per superblock rather than
> filesystem type.
> 
> 0003 updates blkio documentation with information on cgroup writeback
> support.

Jens, this is late in the merge window but these three patches are low
risk and would be nice to make available for -rc1 so that future
filesystem cgroup writeback support doesn't have to pull in cgroup
branch.  What do you think?

Thanks.

-- 
tejun
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