Re: [PATCHSET v2 block/for-4.2/writeback] cgroup, writeback: misc updates for cgroup writeback support
From: Tejun Heo
Date: Wed Jun 17 2015 - 14:31:22 EST
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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