Re: [LTP] [PATCH 2/2] [Realtime] hrtimer-prio - Add a flag to tell busy threads to exit

[Gilles C. <Gil...@bu...>]

I made a mistake in the comment.

Main thread is the writer.
So instead, it should be:

This fixes this deadlock/race condition:
	1. busy threads run until main thread exits
	2. main thread is writing samples results into
	   files and waits for a filesystem global lock to be released
	4. sync threads (kjournald, pdflush) with non-rt prio hold
	   the above mentioned lock and cannot finish their job because
	   cpu is hogged by busy threads.

Gilles.


Gilles Carry wrote:
> This flag is set by timer_thread when the sampling is finished.
> This fixes this deadlock/race condition:
> 	1. busy threads run until main thread exits
> 	2. main thread waits for timer_thread to finish
> 	3. timer_thread is writing samples results into
> 	   files and waits for a filesystem global lock to be released
> 	4. sync threads (kjournald, pdflush) with non-rt prio hold
> 	   the above mentioned lock and cannot finish their job because
> 	   cpu is hogged by busy threads.
>