Il 27/09/23 23:29, Adrián Larumbe ha scritto:
Some BO's might be mapped onto physical memory chunkwise and on demand, like Panfrost's tiler heap. In this case, even though the drm_gem_shmem_object page array might already be allocated, only a very small fraction of the BO is currently backed by system memory, but drm_show_memory_stats will then proceed to add its entire virtual size to the file's total resident size regardless. This led to very unrealistic RSS sizes being reckoned for Panfrost, where said tiler heap buffer is initially allocated with a virtual size of 128 MiB, but only a small part of it will eventually be backed by system memory after successive GPU page faults. Provide a new DRM object generic function that would allow drivers to return a more accurate RSS and purgeable sizes for their BOs. Signed-off-by: Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx> Reviewed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx> Reviewed-by: Steven Price <steven.price@xxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
