Hello,
On 3/9/22 11:59, Thomas Zimmermann wrote:
Hi
Am 08.03.22 um 14:17 schrieb Dmitry Osipenko:
Hello,
This patchset introduces memory shrinker for the VirtIO-GPU DRM driver. During OOM, the shrinker will release BOs that are marked as "not needed" by userspace using the new madvise IOCTL. The userspace in this case is the Mesa VirGL driver, it will mark the cached BOs as "not needed", allowing kernel driver to release memory of the cached shmem BOs on lowmem situations, preventing OOM kills.
Virtio-gpu is build on top of GEM shmem helpers. I have a prototype patchset that adds a shrinker to these helpers. If you want to go further, you could implement something like that instead. Panfrost and lima also have their own shrinker and could certainly be converted to the gem-shmem shrinker.
I had a thought that it could be possible to unify shrinkers into a common DRM framework. Could you please give me a link to yours prototype patchset?