diff options
| author |   Boris Brezillon <boris.brezillon@collabora.com> | 2019-11-29 14:59:08 +0100 |
|---|---|---|
| committer |   Rob Herring <robh@kernel.org> | 2020-02-03 11:23:21 +0000 |
| commit | 7e0cf7e9936c4358b0863357b90aa12afe6489da (patch) | |
| tree | dcc48a883e1e10ddef9ba7f8791d2894a66d7bf9 /drivers/gpu/drm/panfrost/panfrost_gem.h | |
| parent | drm/mst: Fix possible NULL pointer dereference in drm_dp_mst_process_up_req() (diff) | |
| download | linux-dev-7e0cf7e9936c4358b0863357b90aa12afe6489da.tar.xz linux-dev-7e0cf7e9936c4358b0863357b90aa12afe6489da.zip | |
drm/panfrost: Make sure the shrinker does not reclaim referenced BOs
Userspace might tag a BO purgeable while it's still referenced by GPU
jobs. We need to make sure the shrinker does not purge such BOs until
all jobs referencing it are finished.
Fixes: 013b65101315 ("drm/panfrost: Add madvise and shrinker support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191129135908.2439529-9-boris.brezillon@collabora.com
Diffstat (limited to 'drivers/gpu/drm/panfrost/panfrost_gem.h')
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_gem.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.h b/drivers/gpu/drm/panfrost/panfrost_gem.h index ca1bc9019600..b3517ff9630c 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem.h +++ b/drivers/gpu/drm/panfrost/panfrost_gem.h @@ -30,6 +30,12 @@ struct panfrost_gem_object { struct mutex lock; } mappings; + /* + * Count the number of jobs referencing this BO so we don't let the + * shrinker reclaim this object prematurely. + */ + atomic_t gpu_usecount; + bool noexec :1; bool is_heap :1; }; |