Hi all, This patchset move lru_lock into lruvec, give a lru_lock for each of lruvec, thus bring a lru_lock for each of memcg per node. According to Daniel Jordan's suggestion, I run 64 'dd' with on 32 containers on my 2s* 8 core * HT box with the modefied case: https://git.kernel.org/pub/scm/linux/kernel/git/wfg/vm-scalability.git/tree/case-lru-file-readtwice With this change above lru_lock censitive testing improved 17% with multiple containers scenario. And no performance lose w/o mem_cgroup. Thanks Hugh Dickins and Konstantin Khlebnikov, they both bring the same idea 7 years ago. I don't know why they didn't go further, but according to my testing, and google internal usage. This feathre is clearly benefit multi-container user. So I like to introduce it here. v2: bypass a performance regression bug and fix some function issues --- Documentation/admin-guide/cgroup-v1/memcg_test.rst | 15 +++------------ Documentation/admin-guide/cgroup-v1/memory.rst | 6 +++--- Documentation/trace/events-kmem.rst | 2 +- Documentation/vm/unevictable-lru.rst | 22 ++++++++-------------- include/linux/memcontrol.h | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ include/linux/mm_types.h | 2 +- include/linux/mmzone.h | 7 +++++-- mm/compaction.c | 62 ++++++++++++++++++++++++++++++++++++++++++-------------------- mm/filemap.c | 4 ++-- mm/huge_memory.c | 16 ++++++---------- mm/memcontrol.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++------------- mm/mlock.c | 27 ++++++++++++++------------- mm/mmzone.c | 1 + mm/page_alloc.c | 1 - mm/page_idle.c | 5 +++-- mm/rmap.c | 2 +- mm/swap.c | 77 +++++++++++++++++++++++++++++++---------------------------------------------- mm/vmscan.c | 74 ++++++++++++++++++++++++++++++++++++++------------------------------------ 18 files changed, 277 insertions(+), 177 deletions(-) [PATCH v2 1/8] mm/lru: add per lruvec lock for memcg [PATCH v2 2/8] mm/lruvec: add irqsave flags into lruvec struct [PATCH v2 3/8] mm/lru: replace pgdat lru_lock with lruvec lock [PATCH v2 4/8] mm/lru: only change the lru_lock iff page's lruvec is [PATCH v2 5/8] mm/pgdat: remove pgdat lru_lock [PATCH v2 6/8] mm/lru: remove rcu_read_lock to fix performance [PATCH v2 7/8] mm/lru: likely enhancement [PATCH v2 8/8] mm/lru: revise the comments of lru_lock
