Re: possible deadlock in generic_file_write_iter

From: Byungchul Park
Date: Tue Nov 07 2017 - 03:30:11 EST


11/7/2017 5:11 PMì Peter Zijlstra ì(ê) ì ê:
On Tue, Nov 07, 2017 at 09:54:42AM +0900, Byungchul Park wrote:
The best I could come up with is something like the below; its not
at all pretty and I could see people objecting; least of all myself for
the __complete() thing, but I ran out of creative naming juice.

Patches assigning a lock_class per gendisk were already applied in tip.
I believe that solves this.

e319e1fbd9d42420ab6eec0bfd75eb9ad7ca63b1
block, locking/lockdep: Assign a lock_class per gendisk used for
wait_for_completion()

I think the following proposal makes kernel too hacky.

Ah, I tough this was with those included...

Please CC me for issues wrt. crossrelease.

--
Thanks,
Byungchul