linux-kernel - Re: [PATCH 2/2] drm/fence: allow fence waiting to be interrupted by userspace

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Message-ID: <20160815144545.GA9397@joana>
Date:	Mon, 15 Aug 2016 11:45:45 -0300
From:	Gustavo Padovan <gustavo@...ovan.org>
To:	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc:	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Daniel Stone <daniels@...labora.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Rob Clark <robdclark@...il.com>,
	Greg Hackmann <ghackmann@...gle.com>,
	John Harrison <John.C.Harrison@...el.com>,
	laurent.pinchart@...asonboard.com, seanpaul@...gle.com,
	marcheu@...gle.com, m.chehab@...sung.com,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>
Subject: Re: [PATCH 2/2] drm/fence: allow fence waiting to be interrupted by
 userspace

2016-08-15 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>:

> Op 11-08-16 om 20:39 schreef Gustavo Padovan:
> > From: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
> >
> > If userspace is running an synchronously atomic commit and interrupts the
> > atomic operation during fence_wait() it will hang until the timer expires,
> > so here we change the wait to be interruptible so it stop immediately when
> > userspace wants to quit.
> >
> > Also adds the necessary error checking for fence_wait().
> >
> > v2: Comment by Daniel Vetter
> > 	- Add error checking for fence_wait()
> >
> > v3: Rebase on top of new atomic noblocking support
> Meh, I don't like the swapped parameter much, couldn't we infer it from intr? or rename intr to swapped?

Definitely, I didn't realized it myself that both were saying the same
thing. Thanks for the suggesttion.

Gustavo