This includes adding support for larger folios in damon for paddr, which means largers folios will have their access checked and will be considered for different DAMOS actions like pageout, prioritization and migration. Patches 3-6 add support for DAMOS hugepage filter type. This is to gather statistics to check if memory regions of specific access tempratures are backed by hugepages of a size in a specific range. This filter can help to observe and prove the effectivenes of different schemes for shrinking/collapsing hugepages. I have kept patches 1-2 as part of these series as the later patches are dependent on them. The corresponding damo PR is at https://github.com/damonitor/damo/pull/20. v3 -> v4: - Add support for large folios of all sizes, and not just PMD mapped hugepages (David and SJ). - only get folio while checking access/ applying DAMOS scheme if the head page is also part of that region. v2 -> v3: - expose hugepage via sysfs even if the kernel is built without hugepage support. DAMON will just just return 0. (SJ Park) v1 -> v2: - Wrap DAMOS_FILTER_TYPE_HUGEPAGE case with CONFIG_PGTABLE_HAS_HUGE_LEAVES (SJ Park) Usama Arif (6): mm/damon: have damon_get_folio return folio even for tail pages mm/damon/paddr: use damon_get_folio_in_region to obtain folio mm/damon/sysfs-schemes: add files for setting damos_filter->folio_size mm/damon: introduce DAMOS filter type hugepage Docs/ABI/damon: document DAMOS sysfs files to set the min/max folio_size Docs/admin-guide/mm/damon/usage: Document hugepage filter type .../ABI/testing/sysfs-kernel-mm-damon | 12 +++ Documentation/admin-guide/mm/damon/usage.rst | 17 +++-- include/linux/damon.h | 13 ++++ mm/damon/core.c | 3 + mm/damon/ops-common.c | 2 +- mm/damon/paddr.c | 75 +++++++++++++++---- mm/damon/sysfs-schemes.c | 54 +++++++++++++ 7 files changed, 151 insertions(+), 25 deletions(-) -- 2.43.5
