Re: Filesystem lockup with CONFIG_PREEMPT_RT
From: Mike Galbraith
Date: Thu Jun 26 2014 - 23:22:59 EST
On Thu, 2014-06-26 at 17:07 -0700, Austin Schuh wrote:
> If I'm reading the rt patch correctly, wq_worker_sleeping was moved
> out of __schedule to sched_submit_work. It looks like that changes
> the conditions under which wq_worker_sleeping is called. It used to
> be called whenever a task was going to sleep (I think). It looks like
> it is called now if the task is going to sleep, and if the task isn't
> blocked on a PI mutex (I think).
Re-entanglement does turn your killer into a happy camper, but that
patch is too lovely to just surrender without a squabble.
-Mike
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