drm/msm: Avoid mutex in shrinker_count()

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When the system is under heavy memory pressure, we can end up with lots
of concurrent calls into the shrinker.  Keeping a running tab on what we
can shrink avoids grabbing a lock in shrinker->count(), and avoids
shrinker->scan() getting called when not profitable.

Also, we can keep purged objects in their own list to avoid re-traversing
them to help cut down time in the critical section further.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20210401012722.527712-3-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>

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This commit is contained in:

Rob Clark 2021-03-31 18:27:19 -07:00

parent bc90dc33c4

commit cc8a4d5a1b

5 changed files with 81 additions and 27 deletions

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1

drivers/gpu/drm/msm/msm_drv.c

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6

drivers/gpu/drm/msm/msm_drv.h

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20

drivers/gpu/drm/msm/msm_gem.c

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53

drivers/gpu/drm/msm/msm_gem.h

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28

drivers/gpu/drm/msm/msm_gem_shrinker.c

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