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

From: Artem Bityutskiy
Date: Fri Sep 25 2015 - 02:49:24 EST

On Thu, 2015-09-24 at 16:45 -0400, Tejun Heo wrote:
> Hello, Artem.
> On Thu, Sep 24, 2015 at 11:09:46AM +0300, Artem Bityutskiy wrote:
> > On Wed, 2015-09-23 at 17:07 -0400, Tejun Heo wrote:
> > > 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.
> >
> > this hits the nail on the head and makes the problem go away.
> Yeah but there still is an underlying problem here. I've been going
> through the sync path today but can't trigger or spot anything wrong.
> Can you please apply the patch at the end of this mail, trigger the
> failure and report the kernel log?
> Thanks a lot.

Does not compile with multiple errors like

linux/fs/fs-writeback.c:799:10: error: âstruct bdi_writebackâ has no member named âlast_comp_genâ
bdi->wb.last_comp_gen = bdi->wb.comp_gen;

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