Hi SeongJae, On 2/20/2025 7:01 AM, SeongJae Park wrote:
User decides whether their memory will be mapped or unmapped. It implies that the two types of memory can have different characteristics and management requirements. Provide the DAMON-observaibility DAMOS-operation capability for the different types by introducing a new DAMOS filter type for unmapped pages.
I asked it before at https://github.com/damonitor/damo/issues/13 about monitoring unused paddr area but I see this patch series is related to applying DAMOS action. Regarding that, do you think we can skip those unused memory area using this filter before applying DAMOS action? I'm not sure if the current DAMOS tries pageout/migrate action for those unused area because they are detected as cold area although those will be imediately skiped inside action scheme. Thanks, Honggyu
Changes from RFC (https://lore.kernel.org/20241127205624.86986-1-sj@xxxxxxxxxx) - Rebase on latest mm-unstable - Wordsmith commit message - Add documentation SeongJae Park (2): mm/damon: implement a new DAMOS filter type for unmapped pages Docs/mm/damon/design: document unmapped DAMOS filter type Documentation/mm/damon/design.rst | 2 ++ include/linux/damon.h | 2 ++ mm/damon/paddr.c | 3 +++ mm/damon/sysfs-schemes.c | 1 + 4 files changed, 8 insertions(+) base-commit: a2130e89cbd08ddb6f023b0b10eb87ebbc67add1
