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 v5.17.
The patch set was tested on my end by building an x86_64 kernel
with PREEMPT_RT, cgroup debug and lockdep enabled. The kernel was
run in Qemu, where a small number of child cgroups were created,
with memory controller enabled for each and an instance of a small
test program running.
Changes in v2:
- Use the exact patch set merged upstream
David Oberhollenzer (1):
Allow MEMCG on PREEMPT_RT
Johannes Weiner (1):
mm/memcg: Opencode the inner part of obj_cgroup_uncharge_pages() in drain_obj_stock()
Michal Hocko (1):
mm/memcg: Revert ("mm/memcg: optimize user context object stock access")
Sebastian Andrzej Siewior (7):
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: Protect memcg_stock with a local_lock_t
mm/memcg: Disable migration instead of preemption in drain_all_stock().
mm/memcg: Add missing counter index which are not update in interrupt.
mm/memcg: Add a comment regarding the release `obj'.
mm/memcg: Only perform the debug checks on !PREEMPT_RT
.../admin-guide/cgroup-v1/memory.rst | 2 +
init/Kconfig | 1 -
mm/memcontrol.c | 232 +++++++++++-------
3 files changed, 146 insertions(+), 89 deletions(-)
--
2.37.1
