mm/damon: add DAMOS filter type YOUNG
Define yet another DAMOS filter type, YOUNG. Like anon and memcg, the type of filter will be applied to each page in the memory region, and see if the page is accessed since the last check. Based on the 'matching' parameter, the page is filtered out or in. Note that this commit is adding only the type definition. The implementation should be made by DAMON operations sets. A commit for the implementation on 'paddr' DAMON operations set will follow. Link: https://lkml.kernel.org/r/20240426195247.100306-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Tested-by: Honggyu Kim <honggyu.kim@sk.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -297,6 +297,7 @@ struct damos_stat {
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* enum damos_filter_type - Type of memory for &struct damos_filter
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* @DAMOS_FILTER_TYPE_ANON: Anonymous pages.
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* @DAMOS_FILTER_TYPE_MEMCG: Specific memcg's pages.
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* @DAMOS_FILTER_TYPE_YOUNG: Recently accessed pages.
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* @DAMOS_FILTER_TYPE_ADDR: Address range.
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* @DAMOS_FILTER_TYPE_TARGET: Data Access Monitoring target.
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* @NR_DAMOS_FILTER_TYPES: Number of filter types.
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@ -315,6 +316,7 @@ struct damos_stat {
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enum damos_filter_type {
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DAMOS_FILTER_TYPE_ANON,
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DAMOS_FILTER_TYPE_MEMCG,
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DAMOS_FILTER_TYPE_YOUNG,
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DAMOS_FILTER_TYPE_ADDR,
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DAMOS_FILTER_TYPE_TARGET,
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NR_DAMOS_FILTER_TYPES,
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@ -343,6 +343,7 @@ static struct damon_sysfs_scheme_filter *damon_sysfs_scheme_filter_alloc(void)
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static const char * const damon_sysfs_scheme_filter_type_strs[] = {
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"anon",
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"memcg",
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"young",
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"addr",
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"target",
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};
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