Boris Brezillon
ee82f9f07e
The panfrost BO cache can only grow since all newly allocated BOs are returned to the cache (unless they've been exported). With the MADVISE ioctl that's not a big issue because the kernel can come and reclaim this memory, but MADVISE will only be available on 5.4 kernels. This means an app can currently allocate a lot memory without ever releasing it, leading to some situations where the OOM-killer kicks in and kills the app (or even worse, kills another process consuming more memory than the GL app) to get some of this memory back. Let's try to limit the amount of BOs we keep in the cache by evicting entries that have not been used for more than one second (if the app stopped allocating BOs of this size, it's likely to not allocate similar BOs in a near future). This solution is based on the VC4/V3D implementation. Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com> Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
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