A Fix Is Pending For That Linux 5.15 Performance Regression
Written by Michael Larabel in Software on 23 September 2021 at 09:15 AM EDT. Page 3 of 4. 5 Comments.
Linux 5.15 with the "flush-in-the-ref" patch is indeed in good shape and performing inline with the current Linux 5.14 kernel from this patch.
Runs on an Intel "Tiger Lake" notebook also further confirmed the issue being resolved by this new patch: