Messages in this thread | | | Date | Fri, 20 Oct 2017 15:14:06 +0900 | From | Byungchul Park <> | Subject | Re: [RESEND PATCH 1/3] completion: Add support for initializing completion with lockdep_map |
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On Thu, Oct 19, 2017 at 11:24:00PM +0000, Bart Van Assche wrote: > Are there any completion objects for which the cross-release checking is > useful? Are there any wait_for_completion() callers that hold a mutex or > other locking object?
Check /proc/lockdep, then you can find all dependencies wrt cross-lock. I named a lock class of wait_for_completion(), a sting starting with "(complete)".
For example, in my machine:
console_lock -> (complete)&req.done cpu_hotplug_lock.rw_sem -> (complete)&st->done_up cpuhp_state_mutex -> (complete)&st->done_up
and so on.
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