linux-kernel - [PATCH v1 0/3] drm_buddy regresion fix and minor improvements

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Message-ID: <20250702161208.25188-1-pierre-eric.pelloux-prayer@amd.com>
Date: Wed, 2 Jul 2025 18:12:01 +0200
From: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
To:
CC: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>,
	Christian König <christian.koenig@....com>, Alex Deucher
	<alexander.deucher@....com>, Arunpravin Paneer Selvam
	<Arunpravin.PaneerSelvam@....com>, David Airlie <airlied@...il.com>, "Maarten
 Lankhorst" <maarten.lankhorst@...ux.intel.com>, Matthew Auld
	<matthew.auld@...el.com>, Maxime Ripard <mripard@...nel.org>, Simona Vetter
	<simona@...ll.ch>, Thomas Zimmermann <tzimmermann@...e.de>,
	<amd-gfx@...ts.freedesktop.org>, <dri-devel@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH v1 0/3] drm_buddy regresion fix and minor improvements

Hi,

The first patch fixes a performance issue caused by a change in
drm_buddy ("drm/buddy: Implement tracking clear page feature").
It may be related to https://gitlab.freedesktop.org/drm/amd/-/issues/4260.

The other 2 patches are improvements based on my limited understanding
of the code and that seem to work as expected.


Pierre-Eric Pelloux-Prayer (3):
  drm/buddy: add a flag to disable trimming of non cleared blocks
  drm/buddy: use DRM_BUDDY_CLEAR_ALLOCATION as a hint, not a hard req
  drm/buddy: dont go over the higher orders multiple times

 drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 10 ++-
 drivers/gpu/drm/drm_buddy.c                  | 61 ++++++++++------
 drivers/gpu/drm/tests/drm_buddy_test.c       | 75 +++-----------------
 include/drm/drm_buddy.h                      |  3 +-
 4 files changed, 57 insertions(+), 92 deletions(-)

-- 
2.43.0