On 2022-06-22 13:05:02 [+0200], Richard Weinberger wrote: > This is a backport of Sebastian's MEMCG changes to v5.15, with these patches applied, > it is possible to use memory cgroups together with PREEMPT_RT on v5.15, just like on v5.16. > > Richard Weinberger (1): > Allow MEMCG on PREEMPT_RT > > Sebastian Andrzej Siewior (3): > mm/memcg: Disable threshold event handlers on PREEMPT_RT > mm/memcg: Protect per-CPU counter by disabling preemption on > PREEMPT_RT where needed. > mm/memcg: Add a local_lock_t for IRQ and TASK object. So you took the four patches from v5.16 and added it to v5.15. I would prefer taking what ended up in v5.17 as of v5.17.1-rt17 - 0001-mm-memcg-Revert-mm-memcg-optimize-user-context-objec.patch - 0002-mm-memcg-Disable-threshold-event-handlers-on-PREEMPT.patch - 0003-mm-memcg-Protect-per-CPU-counter-by-disabling-preemp.patch - 0004-mm-memcg-Opencode-the-inner-part-of-obj_cgroup_uncha.patch - 0005-mm-memcg-Protect-memcg_stock-with-a-local_lock_t.patch - 0006-mm-memcg-Disable-migration-instead-of-preemption-in-.patch - 0007-mm-memcg-Add-missing-counter-index-which-are-not-upd.patch - 0008-mm-memcg-Add-a-comment-regarding-the-release-obj.patch - mm-memcg-Only-perform-the-debug-checks-on-PREEMPT_RT.patch since this is what finally landed upstream. So we don't have an intermediate step from an not supported kernel in a supported one. Sebastian
