Dear Kees, dear Andrew,
No idea, if you are aware of it yet, but three people verified that commit 3202fa62fb (slub: relocate freelist pointer to middle of object) causes a regression on AMD hardware [1].
It’d be great, if you took a look, and advised if this commit (and follow-ups) should be reverted, until the issue is analyzed.
Kind regards, Paul [1]: https://bugzilla.kernel.org/show_bug.cgi?id=207383 "[Regression] 5.7 amdgpu/polaris11 gpf: amdgpu_atomic_commit_tail"