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Message-ID: <20160719004821.GD3078@mtj.duckdns.org>
Date: Mon, 18 Jul 2016 20:48:21 -0400
From: Tejun Heo <tj@...nel.org>
To: Bhaktipriya Shridhar <bhaktipriya96@...il.com>
Cc: Alex Deucher <alexander.deucher@....com>,
Christian König <christian.koenig@....com>,
David Airlie <airlied@...ux.ie>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] drm/radeon: Remove deprecated
create_singlethread_workqueue
On Sat, Jul 16, 2016 at 05:00:44PM +0530, Bhaktipriya Shridhar wrote:
>
> alloc_workqueue replaces deprecated create_singlethread_workqueue().
>
> Each hardware CRTC has a single flip work queue.
> When a radeon_flip_work_func item is queued, it needs to be executed
> ASAP because even a slight delay may cause the flip to be delayed by
> one refresh cycle.
>
> Hence, a dedicated workqueue with WQ_HIGHPRI set, has been used here
> since a delay can cause the outcome to miss the refresh cycle.
>
> Since there are only a fixed number of work items, explicit concurrency
> limit is unnecessary here.
>
> Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@...il.com>
Acked-by: Tejun Heo <tj@...nel.org>
Thanks.
--
tejun
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