[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <5b6d3e7f-c638-fdc7-5080-44d34abed610@ideasonboard.com>
Date: Thu, 17 Feb 2022 14:46:00 +0200
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>, tomba@...nel.org,
airlied@...ux.ie, daniel@...ll.ch
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
linux-omap@...r.kernel.org, merlijn@...zup.org, tony@...mide.com
Subject: Re: [PATCH 3/3] drm: omapdrm: Do no allocate non-scanout GEMs through
DMM/TILER
Hi,
On 19/01/2022 12:23, Ivaylo Dimitrov wrote:
> On devices with DMM, all allocations are done through either DMM or TILER.
> DMM/TILER being a limited resource means that such allocations will start
> to fail before actual free memory is exhausted. What is even worse is that
> with time DMM/TILER space gets fragmented to the point that even if we have
> enough free DMM/TILER space and free memory, allocation fails because there
> is no big enough free block in DMM/TILER space.
>
> Such failures can be easily observed with OMAP xorg DDX, for example -
> starting few GUI applications (so buffers for their windows are allocated)
> and then rotating landscape<->portrait while closing and opening new
> windows soon results in allocation failures.
>
> Fix that by mapping buffers through DMM/TILER only when really needed,
> like, for scanout buffers.
Doesn't this break users that get a buffer from omapdrm and expect it to
be contiguous?
Tomi
Powered by blists - more mailing lists