diff options
| author | Rob Clark <robdclark@chromium.org> | 2020-10-23 09:51:07 -0700 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2020-11-04 16:00:55 -0800 |
| commit | 599089c6af68300207ee1823230d31eda1f15959 (patch) | |
| tree | d23eefdfc8d03d5430b2b8b9d3c4bdeeae5c7f40 /drivers/gpu/drm/msm/msm_gem_shrinker.c | |
| parent | e4b87d227f9e826c2b2db6b662906550a70a089a (diff) | |
drm/msm/gem: Move locking in shrinker path
Move grabbing the bo lock into shrinker, with a msm_gem_trylock() to
skip over bo's that are already locked. This gets rid of the nested
lock classes.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gem_shrinker.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gem_shrinker.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/drivers/gpu/drm/msm/msm_gem_shrinker.c b/drivers/gpu/drm/msm/msm_gem_shrinker.c index 482576d7a39a..2dc0ffa925b4 100644 --- a/drivers/gpu/drm/msm/msm_gem_shrinker.c +++ b/drivers/gpu/drm/msm/msm_gem_shrinker.c @@ -52,8 +52,11 @@ msm_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) return 0; list_for_each_entry(msm_obj, &priv->inactive_list, mm_list) { + if (!msm_gem_trylock(&msm_obj->base)) + continue; if (is_purgeable(msm_obj)) count += msm_obj->base.size >> PAGE_SHIFT; + msm_gem_unlock(&msm_obj->base); } if (unlock) @@ -78,10 +81,13 @@ msm_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) list_for_each_entry(msm_obj, &priv->inactive_list, mm_list) { if (freed >= sc->nr_to_scan) break; + if (!msm_gem_trylock(&msm_obj->base)) + continue; if (is_purgeable(msm_obj)) { - msm_gem_purge(&msm_obj->base, OBJ_LOCK_SHRINKER); + msm_gem_purge(&msm_obj->base); freed += msm_obj->base.size >> PAGE_SHIFT; } + msm_gem_unlock(&msm_obj->base); } if (unlock) @@ -107,15 +113,20 @@ msm_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr) return NOTIFY_DONE; list_for_each_entry(msm_obj, &priv->inactive_list, mm_list) { + if (!msm_gem_trylock(&msm_obj->base)) + continue; if (is_vunmapable(msm_obj)) { - msm_gem_vunmap(&msm_obj->base, OBJ_LOCK_SHRINKER); - /* since we don't know any better, lets bail after a few - * and if necessary the shrinker will be invoked again. - * Seems better than unmapping *everything* - */ - if (++unmapped >= 15) - break; + msm_gem_vunmap(&msm_obj->base); + unmapped++; } + msm_gem_unlock(&msm_obj->base); + + /* since we don't know any better, lets bail after a few + * and if necessary the shrinker will be invoked again. + * Seems better than unmapping *everything* + */ + if (++unmapped >= 15) + break; } if (unlock) |