Re: [PATCH block/for-linus] cgroup,writeback: don't switch wbs immediately on dead wbs if the memcg is dead

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On Mon, Nov 11, 2019 at 08:18:16AM -0800, Tejun Heo wrote:
> Hello, Michal.
> 
> On Mon, Nov 11, 2019 at 02:15:44PM +0100, Michal Hocko wrote:
> > > Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
> > > Cc: Dennis Zhou <dennis@xxxxxxxxxx>
> > > Cc: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx>
> > > Fixes: e8a7abf5a5bd ("writeback: disassociate inodes from dying bdi_writebacks")
> > 
> > Is this a stable material?
> 
> c3aab9a0bd91 ("mm/filemap.c: don't initiate writeback if mapping has
> no dirty pages") likely addresses larger part of the problem, but yeah
> it prolly makes sense to backport both for -stable.
> 
> Greg, Sasha, can you pick the following two commits for -stable?
> 
> * c3aab9a0bd91 ("mm/filemap.c: don't initiate writeback if mapping has
>   no dirty pages")
> 
> * 65de03e25138 ("cgroup,writeback: don't switch wbs immediately on
>   dead wbs if the memcg is dead")
> 
> Both are fixes for e8a7abf5a5bd ("writeback: disassociate inodes from
> dying bdi_writebacks") - v4.2+.

Now queued up, thanks.

greg k-h



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