Hi Linus, This is more of an option than a request for 5.18. I'm sending it to you directly because, in my judgement, it's now as ready as it'll ever be. Thanks! The following changes since commit 46f538bf2404ee9c32648deafb886f49144bfd5e: Merge tag 'backlight-next-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight (2022-03-25 14:01:23 -0700) are available in the Git repository at: https://linux-mm.googlesource.com/mglru/ tags/mglru-for-5.18-rc1 for you to fetch changes up to bcf5f2a801b85f09ad691d07460fdf3fbef8404d: mm: multi-gen LRU: design doc (2022-03-25 15:30:50 -0600) ---------------------------------------------------------------- Multi-gen LRU for 5.18-rc1 This series was retested on top of 5.18-ed4643521e6a. All previous comments have been addressed. Changes since v8 [1] * Removed two user-hostile config options (suggested by Linus Torvalds). Changes since v9 [2] * Resolved the conflicts with the latest folio changes. * Switched to spin_trylock() to move onto the next page table rather than spin on the current one when trying to clear the accessed bit on many page tables. * Added introductory paragraphs to the admin guide and the design doc (suggested by Mike Rapoport). * Expanded comments in get_nr_evictable() (suggested by Barry Song and Aneesh Kumar). * Expanded comments in inc_max_seq() (suggested by Barry Song). [1] https://lkml.kernel.org/r/20220308234723.3834941-1-yuzhao@xxxxxxxxxx [2] https://lkml.kernel.org/r/20220309021230.721028-1-yuzhao@xxxxxxxxxx Signed-off-by: Yu Zhao <yuzhao@xxxxxxxxxx> ---------------------------------------------------------------- Yu Zhao (14): mm: x86, arm64: add arch_has_hw_pte_young() mm: x86: add CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG mm/vmscan.c: refactor shrink_node() Revert "include/linux/mm_inline.h: fold __update_lru_size() into its sole caller" mm: multi-gen LRU: groundwork mm: multi-gen LRU: minimal implementation mm: multi-gen LRU: exploit locality in rmap mm: multi-gen LRU: support page table walks mm: multi-gen LRU: optimize multiple memcgs mm: multi-gen LRU: kill switch mm: multi-gen LRU: thrashing prevention mm: multi-gen LRU: debugfs interface mm: multi-gen LRU: admin guide mm: multi-gen LRU: design doc Documentation/admin-guide/mm/index.rst | 1 + Documentation/admin-guide/mm/multigen_lru.rst | 152 ++ Documentation/vm/index.rst | 1 + Documentation/vm/multigen_lru.rst | 160 ++ arch/Kconfig | 9 + arch/arm64/include/asm/pgtable.h | 14 +- arch/x86/Kconfig | 1 + arch/x86/include/asm/pgtable.h | 9 +- arch/x86/mm/pgtable.c | 5 +- fs/exec.c | 2 + fs/fuse/dev.c | 3 +- include/linux/cgroup.h | 15 +- include/linux/memcontrol.h | 36 + include/linux/mm.h | 7 + include/linux/mm_inline.h | 217 +- include/linux/mm_types.h | 78 + include/linux/mmzone.h | 211 ++ include/linux/nodemask.h | 1 + include/linux/page-flags-layout.h | 11 +- include/linux/page-flags.h | 4 +- include/linux/pgtable.h | 17 +- include/linux/sched.h | 4 + include/linux/swap.h | 4 + kernel/bounds.c | 7 + kernel/cgroup/cgroup-internal.h | 1 - kernel/exit.c | 1 + kernel/fork.c | 9 + kernel/sched/core.c | 1 + mm/Kconfig | 26 + mm/huge_memory.c | 3 +- mm/internal.h | 1 + mm/memcontrol.c | 27 + mm/memory.c | 39 +- mm/mm_init.c | 6 +- mm/mmzone.c | 2 + mm/rmap.c | 7 + mm/swap.c | 55 +- mm/vmscan.c | 3102 +++++++++++++++++++++++-- mm/workingset.c | 119 +- 39 files changed, 4097 insertions(+), 271 deletions(-) create mode 100644 Documentation/admin-guide/mm/multigen_lru.rst create mode 100644 Documentation/vm/multigen_lru.rst
