diff options
| author | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2025-03-23 00:26:05 +0300 |
|---|---|---|
| committer | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2025-03-26 23:00:16 +0300 |
| commit | d586b535f1448a6969e2b664e4e061c40bec4679 (patch) | |
| tree | 8d71fdba7e1cbb576e052c57003e4d41c3dd82b4 /include | |
| parent | eab10538073c3ff9e21c857bd462f79f2f6f7e00 (diff) | |
drm/shmem-helper: Add and use pages_pin_count
Add separate pages_pin_count for tracking of whether drm-shmem pages are
moveable or not. With the addition of memory shrinker support to drm-shmem,
the pages_use_count will no longer determine whether pages are hard-pinned
in memory, but whether pages exist and are soft-pinned (and could be swapped
out). The pages_pin_count > 1 will hard-pin pages in memory.
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Suggested-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-8-dmitry.osipenko@collabora.com
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/drm_gem_shmem_helper.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/drm/drm_gem_shmem_helper.h b/include/drm/drm_gem_shmem_helper.h index 0609e336479d..d411215fe494 100644 --- a/include/drm/drm_gem_shmem_helper.h +++ b/include/drm/drm_gem_shmem_helper.h @@ -40,6 +40,17 @@ struct drm_gem_shmem_object { unsigned int pages_use_count; /** + * @pages_pin_count: + * + * Reference count on the pinned pages table. + * + * Pages are hard-pinned and reside in memory if count + * greater than zero. Otherwise, when count is zero, the pages are + * allowed to be evicted and purged by memory shrinker. + */ + refcount_t pages_pin_count; + + /** * @madv: State for madvise * * 0 is active/inuse. |