Messages in this thread | | | Date | Wed, 16 Feb 2022 09:10:29 +0100 | Subject | Re: [PATCH 0/3] drm: omapdrm: Fix excessive GEM buffers DMM/CMA usage | From | Thomas Zimmermann <> |
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Hi
Am 19.01.22 um 11:23 schrieb Ivaylo Dimitrov: > This patch series fixes excessive DMM or CMA usage of GEM buffers leading to > various runtime allocation failures. The series enables daily usage of devices > without exausting limited resources like CMA or DMM space if GPU rendering is > needed. > > The first patch doesn't bring any functional changes, it just moves some > TILER/DMM related code to a separate function, to simplify the review of the > next two patches. > > The second patch allows off-CPU rendering to non-scanout buffers. Without that > patch, it is basically impossible to use the driver allocated GEM buffers on > OMAP3 for anything else but a basic CPU rendered examples as if we want GPU > rendering, we must allocate buffers as scanout buffers, which are CMA allocated. > CMA soon gets fragmented and we start seeing allocation failures. Such failres > in Xorg cannot be handeled gracefully, so the system is basically unusable. > > Third patch fixes similar issue on OMAP4/5, where DMM/TILER spaces get > fragmented with time, leading to allocation failures. > > Series were tested on Motolola Droid4 and Nokia N900, with OMAP DDX and > PVR EXA from https://github.com/maemo-leste/xf86-video-omap > > Ivaylo Dimitrov (3): > drm: omapdrm: simplify omap_gem_pin > drm: omapdrm: Support exporting of non-contiguous GEM BOs > drm: omapdrm: Do no allocate non-scanout GEMs through DMM/TILER
With the little expertise I have with omapdrm:
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
> > drivers/gpu/drm/omapdrm/omap_gem.c | 198 +++++++++++++++++------------- > drivers/gpu/drm/omapdrm/omap_gem.h | 3 +- > drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 5 +- > 3 files changed, 116 insertions(+), 90 deletions(-) >
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Ivo Totev [unhandled content-type:application/pgp-signature] | |