drm/msm: Drop mm_lock in scan loop

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lock_stat + mmm_donut[1] say that this reduces contention on mm_lock
significantly (~350x lower waittime-max, and ~100x lower waittime-avg)

[1] https://chromium.googlesource.com/chromiumos/platform/microbenchmarks/+/refs/heads/main/mmm_donut.py

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20210402211226.875726-1-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>

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This commit is contained in:

Rob Clark 2021-04-02 14:12:26 -07:00

parent 528107c8e6

commit 25ed38b3ed

3 changed files with 45 additions and 8 deletions

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3

drivers/gpu/drm/msm/msm_drv.h

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2

drivers/gpu/drm/msm/msm_gem.c

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48

drivers/gpu/drm/msm/msm_gem_shrinker.c

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