RFC v1: https://lore.kernel.org/linux-mm/20230509185419.1088297-1-yuanchu@xxxxxxxxxx/ For background and interfaces, see the RFC v1 posting. Changes from v1 -> v2: - Refactored the patchs into smaller pieces - Renamed interfaces and functions from wss to wsr (Working Set Reporting) - Fixed build errors when CONFIG_WSR is not set - Changed working_set_num_bins to u8 for virtio-balloon - Added support for per-NUMA node reporting for virtio-balloon The RFC adds CONFIG_WSR and requires MGLRU to function. T.J. and I aim to support the active/inactive LRU and working set estimation from the userspace as well. This series should be build with the following configs: CONFIG_LRU_GEN=y CONFIG_LRU_GEN_ENABLED=y CONFIG_VIRTIO_BALLOON=y CONFIG_WSR=y TODO list: - There's a hack in mm/vmscan.c that calls into the virtio-balloon driver, which doesn't work if CONFIG_VIRTIO_BALLOON=m. T.J. Alumbaugh (talumbau@xxxxxxxxxx) and I plan on solving this problem with a working set notification mechanism that would allow multiple consumers to subscribe for working set changes. - memory.reaccess.histogram does not consider swapped out pages to be reaccessed. I plan to implement this with the shadow entry computed from mm/workingset.c. QEMU device implementation: https://lists.gnu.org/archive/html/qemu-devel/2023-05/msg06617.html virtio-dev spec proposal v1 (v2 to be posted by T.J.): https://lore.kernel.org/virtio-dev/CABmGT5Hv6Jd_F9EoQqVMDo4w5=7wJYmS4wwYDqXK3wov44Tf=w@xxxxxxxxxxxxxx/ LSF/MM discussion slides: https://lore.kernel.org/linux-mm/CABmGT5HK9xHz=E4q4sECCD8XodP9DUcH0dMeQ8kznUQB5HTQhQ@xxxxxxxxxxxxxx/ T.J. Alumbaugh (1): virtio-balloon: Add Working Set reporting Yuanchu Xie (5): mm: aggregate working set information into histograms mm: add working set refresh threshold to rate-limit aggregation mm: report working set when under memory pressure mm: extend working set reporting to memcgs mm: add per-memcg reaccess histogram drivers/base/node.c | 3 + drivers/virtio/virtio_balloon.c | 288 +++++++++++++++++ include/linux/balloon_compaction.h | 3 + include/linux/memcontrol.h | 6 + include/linux/mmzone.h | 5 + include/linux/wsr.h | 114 +++++++ include/uapi/linux/virtio_balloon.h | 33 ++ mm/Kconfig | 7 + mm/Makefile | 1 + mm/internal.h | 12 + mm/memcontrol.c | 351 ++++++++++++++++++++- mm/mmzone.c | 3 + mm/vmscan.c | 194 +++++++++++- mm/wsr.c | 464 ++++++++++++++++++++++++++++ 14 files changed, 1480 insertions(+), 4 deletions(-) create mode 100644 include/linux/wsr.h create mode 100644 mm/wsr.c -- 2.41.0.162.gfafddb0af9-goog
