On Wed, 2024-10-30 at 12:44 -0700, Yosry Ahmed wrote: > shmem increased by a lot (~1.8G). > > So this looks like it could be the answer to your question about > where > the swap usage is coming from. I would try to find what tmpfs files > are used by this application. Thank you! After doing more digging I reduced it to `Xorg` having a hunderds of `anon_inode:i915.gem`, and afterwards pinned down this to be Picom not freeing resources. Reported on Github¹. That said, isn't there a kernel bug too? If this `shmem` ends up in Swap, then it should be accounted in `Swap` fields of `proc/<pid>/smaps` accordingly, right? In the end, that's what the field is for: amount of SWAP taken by a process. Otherwise it is a "phantom memory": something being in SWAP, but who owns this "something" — there's no way to know, it just kind of "exists" amidst kernel and processes realms. 1: https://github.com/yshui/picom/issues/1378
