Re: [RFC+PATCH] Infiniband hfi1 + PREEMPT_RT_FULL issues

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Em Mon, Sep 25, 2017 at 04:15:28PM -0400, Steven Rostedt escreveu:
> On Mon, 25 Sep 2017 11:49:49 -0300 Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> wrote:
> > I'm wondering if turning this sc->alloc_lock to a raw_spin_lock is the
> > right solution, which I'm afraid its not, as there are places where it
> > is held and then the code goes on to grab other non-raw spinlocks...
 
> No, the correct solution is to convert the preempt_disable into a
> local_lock(), which will be a preempt_disable when PREEMPT_RT is not
> set. Look for other patches that convert preempt_disable() into
> local_lock()s for examples.

Thanks, I had seen a patch patch by Sebastian for random.c doing that,
will continue in that direction.

- Arnaldo
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