Re: [PATCH v1 0/5] Add memory shrinker to VirtIO-GPU DRM driver

[Dmitry Osipenko]

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?