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authorChris Wilson <chris@chris-wilson.co.uk>2012-12-19 16:51:06 +0000
committerDaniel Vetter <daniel.vetter@ffwll.ch>2013-01-08 11:52:02 +0100
commit901593f2bf221659a605bdc1dcb11376ea934163 (patch)
tree4cee7420d2045c53974af51288372e2fe7e35ab0 /include/drm/drm_mm.h
parent3490ea5de6ac4af309c3df8a26a5cca61306334c (diff)
downloadlinux-901593f2bf221659a605bdc1dcb11376ea934163.tar.bz2
drm: Only evict the blocks required to create the requested hole
Avoid clobbering adjacent blocks if they happen to expire earlier and amalgamate together to form the requested hole. In passing this fixes a regression from commit ea7b1dd44867e9cd6bac67e7c9fc3f128b5b255c Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Fri Feb 18 17:59:12 2011 +0100 drm: mm: track free areas implicitly which swaps the end address for size (with a potential overflow) and effectively causes the eviction code to clobber almost all earlier buffers above the evictee. v2: Check the original hole not the adjusted as the coloring may confuse us when later searching for the overlapping nodes. Also make sure that we do apply the range restriction and color adjustment in the same order for both scanning, searching and insertion. v3: Send the version that was actually tested. Note that this seems to be ducttape of decent quality ot paper over some of our unbind related gpu hangs reported since 3.7. It is not fully effective though, and certainly doesn't fix the underlying bug. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> [danvet: Added note plus bugzilla link and tested-by.] Cc: stable@vger.kernel.org Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=55984 Tested-by: Norbert Preining <preining@logic.at> Acked-by: Dave Airlie <airlied@gmail.com Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'include/drm/drm_mm.h')
-rw-r--r--include/drm/drm_mm.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h
index 0f4a366f6fa6..3527fb3f75bb 100644
--- a/include/drm/drm_mm.h
+++ b/include/drm/drm_mm.h
@@ -70,7 +70,7 @@ struct drm_mm {
unsigned long scan_color;
unsigned long scan_size;
unsigned long scan_hit_start;
- unsigned scan_hit_size;
+ unsigned long scan_hit_end;
unsigned scanned_blocks;
unsigned long scan_start;
unsigned long scan_end;