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@kernel.org Cc: Dennis Zhou dennis@kernel.org Cc: Konstantin Khlebnikov khlebnikov@yandex-team.ru 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