PSA: msm-next-staging[1] should have more or less what will be in msm-next for v5.13. I've done some testing on hw that I have with me, but I don't have everything, so this is a good time to test and let me know if you have any issues before the patches are merged. And a good chance to double check that there isn't something important missing. Also, I've pulled in (at least for now), the swappable GEM object support. But compared to the patchset on list, I've flipped the default to disabled. It can be enabled with msm.enable_eviction=1 in the kernel cmdline or: echo 1 > /sys/module/msm/parameters/enable_eviction It won't do anything without some sort of swap enabled. (On chromebooks, we use zram swap, that is what I recommend since it is not nearly as slow as disk backed swap, yet still gives a useful increase in usable memory.) Since we have a lot of generations of devices supported, paired with a few different possible iommu's, it would be helpful if others could try enabling it and report issues. In the best case, it all "just works"(TM).. otherwise if at least the iommu is working properly, you may see new iommu faults. In the worst case if the iommu is not working well, you'll get exciting random memory corruption! A good way to test is, with something running on the gpu, run mmm_donut.py[2], ie. something like: ./mmm_donut.py --free_swap=1024 --taste=20 --chew=20 you want the free_swap param to not be more than half your swap size. You can get a summary of the state of gpu buffers with: localhost ~ # tail -5 /sys/kernel/debug/dri/1/gem Total: 5264 objects, 328941568 bytes Active: 0 objects, 0 bytes Resident: 11 objects, 8527872 bytes Purgeable: 44 objects, 5591040 bytes Purged: 0 objects, 0 bytes localhost ~ # Total minus Resident will give a rough idea of what has been unpinned and swappable.. (it is normal for Resident to be *slightly* less than Active, because sometimes userspace allocates things that it doesn't use, or hasn't used yet, and newly allocated GEM objects do not have pages allocated until first use). BR, -R [1] https://gitlab.freedesktop.org/drm/msm/-/commits/msm-next-staging/ [2] https://chromium.googlesource.com/chromiumos/platform/microbenchmarks/+/refs/heads/main/mmm_donut.py
