Re: WARNING: syz-executor still has locks held!

[Oleg Nesterov]

On 03/20, Michal Hocko wrote:
>
> Yes we do hold the cgred mutex while calling freezable_schedule but why
> are we getting a warning is not really clear to me. The task should be
> hidden from the freezer so why do we warn at all?

try_to_freeze() calls debug_check_no_locks_held() and this makes sense.

Another task can sleep waiting for the same lock; in this case
try_to_freeze_tasks() will fail but it won't blame the lock holder exactly
because it is "hidden from the freezer".

Oleg.