From: Arnaldo Carvalho de Melo <acme-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Steven Rostedt <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org>
Cc: Mike Marciniszyn
<mike.marciniszyn-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Dennis Dalessandro
<dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Clark Williams <williams-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Dean Luick <dean.luick-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Jubin John <jubin.john-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Kaike Wan <kaike.wan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Leon Romanovsky <leonro-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Sebastian Andrzej Siewior
<sebastian.siewior-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Sebastian Sanchez
<sebastian.sanchez-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
linux-rt-users-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [RFC+PATCH] Infiniband hfi1 + PREEMPT_RT_FULL issues
Date: Tue, 26 Sep 2017 10:15:29 -0300 [thread overview]
Message-ID: <20170926131529.GB25735@kernel.org> (raw)
In-Reply-To: <20170925161528.52d34769-ZM9ACYiE99GSuEeoRQArULNAH6kLmebB@public.gmane.org>
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-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> 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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next prev parent reply other threads:[~2017-09-26 13:15 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-25 14:49 [RFC+PATCH] Infiniband hfi1 + PREEMPT_RT_FULL issues Arnaldo Carvalho de Melo
2017-09-25 19:45 ` Arnaldo Carvalho de Melo
[not found] ` <20170925144949.GP29668-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2017-09-25 20:15 ` Steven Rostedt
[not found] ` <20170925161528.52d34769-ZM9ACYiE99GSuEeoRQArULNAH6kLmebB@public.gmane.org>
2017-09-26 13:15 ` Arnaldo Carvalho de Melo [this message]
[not found] ` <20170926131529.GB25735-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2017-09-26 17:55 ` Marciniszyn, Mike
2017-09-26 18:28 ` Arnaldo Carvalho de Melo
2017-09-26 21:11 ` Steven Rostedt
2017-09-25 21:14 ` Julia Cartwright
2017-09-26 14:10 ` Marciniszyn, Mike
[not found] ` <32E1700B9017364D9B60AED9960492BC3441B3BD-RjuIdWtd+YbTXloPLtfHfbfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2017-09-26 14:56 ` Steven Rostedt
2017-09-26 21:00 ` Julia Cartwright
2017-10-06 9:23 ` Sebastian Andrzej Siewior
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