Hi Linus, This pull request contains: - percpu chunk depopulation - depopulate backing pages for chunks with empty pages when we exceed a global threshold without those pages. This lets us reclaim a portion of memory that would previously be lost until the full chunk would be freed (possibly never). - memcg accounting cleanup - previously separate chunks were managed for normal allocations and __GFP_ACCOUNT allocations. These are now consolidated which cleans up the code quite a bit. - a few misc clean ups for clang warnings Two notes though. First there is a small conflict in mm/memcontrol.c and I have an example merge in percpu#for-5.14-merge [1]. Second, I have an outstanding patch to do some level of batching for percpu depopulation. Oliver Wang (krobot tests) is reporting a regression only on Knights Landing cpus [2]. I am working on debugging it and hopefully will have it figured out soon. [1] https://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu.git/log/?h=for-5.14-merge [2] https://lore.kernel.org/lkml/20210630074500.GB10248@xsang-OptiPlex-9020/ Thanks, Dennis The following changes since commit d434405aaab7d0ebc516b68a8fc4100922d7f5ef: Linux 5.12-rc7 (2021-04-11 15:16:13 -0700) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu.git for-5.14 for you to fetch changes up to e4d777003a43feab2e000749163e531f6c48c385: percpu: optimize locking in pcpu_balance_workfn() (2021-06-17 23:05:24 +0000) ---------------------------------------------------------------- Dennis Zhou (2): percpu: use pcpu_free_slot instead of pcpu_nr_slots - 1 percpu: initialize best_upa variable Roman Gushchin (8): percpu: fix a comment about the chunks ordering percpu: split __pcpu_balance_workfn() percpu: factor out pcpu_check_block_hint() percpu: implement partial chunk depopulation mm, memcg: mark cgroup_memory_nosocket, nokmem and noswap as __ro_after_init mm, memcg: introduce mem_cgroup_kmem_disabled() percpu: rework memcg accounting percpu: optimize locking in pcpu_balance_workfn() Wei Yongjun (1): percpu: make symbol 'pcpu_free_slot' static include/linux/memcontrol.h | 5 + mm/memcontrol.c | 11 +- mm/percpu-internal.h | 56 +------ mm/percpu-km.c | 10 +- mm/percpu-stats.c | 44 ++---- mm/percpu-vm.c | 35 ++++- mm/percpu.c | 368 +++++++++++++++++++++++++++++++++------------ 7 files changed, 343 insertions(+), 186 deletions(-)
