From: Gustavo Padovan <gustavo@padovan.org>
To: "Christian König" <deathsimple@vodafone.de>
Cc: Andres Rodriguez <andresx7@gmail.com>,
dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org,
linux-media@vger.kernel.org
Subject: Re: [PATCH] dma-buf: avoid scheduling on fence status query v2
Date: Thu, 27 Apr 2017 18:27:48 -0300 [thread overview]
Message-ID: <20170427212748.GD2568@joana> (raw)
In-Reply-To: <92c9bc96-cf60-f246-a82e-47653472521e@vodafone.de>
2017-04-26 Christian König <deathsimple@vodafone.de>:
> Am 26.04.2017 um 16:46 schrieb Andres Rodriguez:
> > When a timeout of zero is specified, the caller is only interested in
> > the fence status.
> >
> > In the current implementation, dma_fence_default_wait will always call
> > schedule_timeout() at least once for an unsignaled fence. This adds a
> > significant overhead to a fence status query.
> >
> > Avoid this overhead by returning early if a zero timeout is specified.
> >
> > v2: move early return after enable_signaling
> >
> > Signed-off-by: Andres Rodriguez <andresx7@gmail.com>
>
> Reviewed-by: Christian König <christian.koenig@amd.com>
pushed to drm-misc-next. Thanks all.
Gustavo
next prev parent reply other threads:[~2017-04-27 21:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-26 14:46 [PATCH] dma-buf: avoid scheduling on fence status query v2 Andres Rodriguez
2017-04-26 14:49 ` Christian König
2017-04-27 21:27 ` Gustavo Padovan [this message]
2017-05-23 23:47 ` [Linaro-mm-sig] " Dave Airlie
2017-05-24 12:21 ` Daniel Vetter
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