diff options
| author | SeongJae Park <sj@kernel.org> | 2025-01-06 11:33:49 -0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-01-25 20:22:26 -0800 |
| commit | b5bbe9c08fd1519f96832b82256543a567ce2900 (patch) | |
| tree | 74bf1927f75667f0b5b1bf8e5e1c1a21c92c531d /include/linux/damon.h | |
| parent | fc4e40937dcd457adfd529c51be0ac7e20845020 (diff) | |
mm/damon: ask apply_scheme() to report filter-passed region-internal bytes
Some DAMOS filter types including those for young page, anon page, and
belonging memcg are handled by underlying DAMON operations set
implementation, via damon_operations->apply_scheme() interface. How many
bytes of the region have passed the filter can be useful for DAMOS scheme
tuning and access pattern monitoring. Modify the interface to let the
callback implementation reports back the number if possible.
Link: https://lkml.kernel.org/r/20250106193401.109161-5-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/damon.h')
| -rw-r--r-- | include/linux/damon.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/damon.h b/include/linux/damon.h index b85eae388f5b..da003173210f 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -529,7 +529,8 @@ enum damon_ops_id { * @apply_scheme is called from @kdamond when a region for user provided * DAMON-based operation scheme is found. It should apply the scheme's action * to the region and return bytes of the region that the action is successfully - * applied. + * applied. It should also report how many bytes of the region has passed + * filters (&struct damos_filter) that handled by itself. * @target_valid should check whether the target is still valid for the * monitoring. * @cleanup is called from @kdamond just before its termination. @@ -546,7 +547,7 @@ struct damon_operations { struct damos *scheme); unsigned long (*apply_scheme)(struct damon_ctx *context, struct damon_target *t, struct damon_region *r, - struct damos *scheme); + struct damos *scheme, unsigned long *sz_filter_passed); bool (*target_valid)(struct damon_target *t); void (*cleanup)(struct damon_ctx *context); }; |