Hello,

On Thu, Aug 15, 2019 at 04:46:23PM +0200, Jan Kara wrote:

Although I would note that here you take effort not to recycle bdi->id so
that you don't flush wrong devices while in patch 4 you take pretty lax
approach to feeding garbage into the writeback system. So these two don't
quite match to me...

So, I was trying to avoid systemic errors where the wrong thing can be
triggered repeatedly.  A wrong flush once in a blue moon shouldn't be
a big problem but if they can be triggered consistently by some
pathological behavior, it's an a lot bigger problem.

Thanks.

-- 
tejun