From: Steven Rostedt <rostedt@goodmis.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Daniel Vetter <daniel@ffwll.ch>,
Maarten Lankhorst <maarten.lankhorst@canonical.com>,
linux-arch@vger.kernel.org, daniel.vetter@ffwll.ch,
x86@kernel.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org,
robclark@gmail.com, tglx@linutronix.de, mingo@elte.hu,
linux-media@vger.kernel.org
Subject: Re: [PATCH v2 2/3] mutex: add support for reservation style locks, v2
Date: Tue, 9 Apr 2013 18:28:08 -0400 [thread overview]
Message-ID: <20130409222808.GC20739@home.goodmis.org> (raw)
In-Reply-To: <1365093662.2609.111.camel@laptop>
On Thu, Apr 04, 2013 at 06:41:02PM +0200, Peter Zijlstra wrote:
> On Thu, 2013-04-04 at 15:31 +0200, Daniel Vetter wrote:
> > The thing is now that you're not expected to hold these locks for a
> > long
> > time - if you need to synchronously stall while holding a lock
> > performance
> > will go down the gutters anyway. And since most current
> > gpus/co-processors
> > still can't really preempt fairness isn't that high a priority,
> > either.
> > So we didn't think too much about that.
>
> Yeah but you're proposing a new synchronization primitive for the core
> kernel.. all such 'fun' details need to be considered, not only those
> few that bear on the one usecase.
Which bares the question, what other use cases are there?
-- Steve
next prev parent reply other threads:[~2013-04-09 22:28 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-28 10:24 [PATCH v2 1/3] arch: make __mutex_fastpath_lock_retval return whether fastpath succeeded or not Maarten Lankhorst
2013-02-28 10:24 ` Maarten Lankhorst
2013-02-28 10:25 ` [PATCH v2 2/3] mutex: add support for reservation style locks, v2 Maarten Lankhorst
2013-02-28 10:25 ` Maarten Lankhorst
2013-04-02 10:56 ` Peter Zijlstra
2013-04-02 10:56 ` Peter Zijlstra
2013-04-02 10:57 ` Peter Zijlstra
2013-04-02 11:00 ` Peter Zijlstra
2013-04-02 14:57 ` Maarten Lankhorst
2013-04-02 14:57 ` Maarten Lankhorst
2013-04-02 16:59 ` Peter Zijlstra
2013-04-02 17:23 ` Daniel Vetter
2013-04-02 17:23 ` Daniel Vetter
2013-04-02 17:30 ` Daniel Vetter
2013-04-02 17:30 ` Daniel Vetter
2013-04-04 12:01 ` Peter Zijlstra
2013-04-04 12:01 ` Peter Zijlstra
2013-04-04 13:31 ` Daniel Vetter
2013-04-04 16:33 ` Peter Zijlstra
2013-04-04 16:33 ` Peter Zijlstra
2013-04-04 16:38 ` Peter Zijlstra
2013-04-04 16:38 ` Peter Zijlstra
2013-04-04 16:59 ` Daniel Vetter
2013-04-09 22:27 ` Steven Rostedt
2013-04-10 8:27 ` Daniel Vetter
2013-04-10 8:27 ` Daniel Vetter
2013-04-04 16:39 ` Peter Zijlstra
2013-04-04 16:39 ` Peter Zijlstra
2013-04-04 16:41 ` Peter Zijlstra
2013-04-04 16:41 ` Peter Zijlstra
2013-04-09 22:28 ` Steven Rostedt [this message]
2013-04-10 9:33 ` Daniel Vetter
2013-04-17 19:08 ` Daniel Vetter
2013-04-18 17:37 ` Ville Syrjälä
2013-04-04 16:43 ` Peter Zijlstra
2013-04-04 16:43 ` Peter Zijlstra
2013-04-04 16:46 ` Peter Zijlstra
2013-04-04 16:46 ` Peter Zijlstra
2013-04-04 16:49 ` Peter Zijlstra
2013-04-04 16:49 ` Peter Zijlstra
2013-04-04 20:44 ` Daniel Vetter
2013-04-04 16:54 ` Peter Zijlstra
2013-04-04 16:54 ` Peter Zijlstra
2013-04-04 16:56 ` Daniel Vetter
2013-04-04 16:56 ` Daniel Vetter
2013-04-08 10:39 ` Peter Zijlstra
2013-04-08 11:50 ` Daniel Vetter
2013-04-08 11:50 ` Daniel Vetter
2013-04-10 10:34 ` Daniel Vetter
2013-04-09 22:42 ` Steven Rostedt
2013-04-10 7:34 ` Peter Zijlstra
2013-04-09 22:18 ` Steven Rostedt
2013-04-02 15:56 ` Daniel Vetter
2013-04-02 11:04 ` Peter Zijlstra
2013-04-02 11:04 ` Peter Zijlstra
2013-02-28 10:25 ` [PATCH v2 3/3] reservation: Add tests to lib/locking-selftest.c. v2 Maarten Lankhorst
2013-03-09 12:06 ` [Linaro-mm-sig] [PATCH v2 1/3] arch: make __mutex_fastpath_lock_retval return whether fastpath succeeded or not Francesco Lavra
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