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b=GCHKvhCvGTpM/2XpsFz1lLNVSIvTRFQPOdAmbNK7MN01cdQtXR5ZBD0h8tE8hxPg/ e5eeICXUYEGBMhkKG1uN+8Emjzw0tNRvU8VdvlNu9dgpswm+srOShrdP5VDyu7MhDO OMVKm5Z0QoMFCvbJ9mIYi3zG+tfsyMNpaRqmlpeFKKLtUetOB0C2onXBd9UvvmEcVs v6jFEtyspHMeuQhhbxkuFWNfmaVOvO/fU1e5rzLi0va1S3k8Jczb4+HKaa7cN4Jk/9 aP3RVKJzp+mt9GhbzJystaLCMmpfPtSQ8S4GezdOLyAnkbrlDhh/Rl84NLa0KetHD7 l8K/14zCKqwrA== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2.2 03/28] mm/damon/core: introduce damon_filter Date: Thu, 14 May 2026 17:44:04 -0700 Message-ID: <20260515004433.128933-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260515004433.128933-1-sj@kernel.org> References: <20260515004433.128933-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: AA6F5A0004 X-Stat-Signature: n77o9kokesa9u8xaxfzgd9sttyfrqftf X-Rspam-User: X-HE-Tag: 1778805887-476329 X-HE-Meta: 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 yzXdCUEH wGFJK327KALquse5diytY7SIxldxK890xsdos7x5WyJdfFDn/E4CVrq4u+INWHTWeEhs4G1ywAXj+F8YEVwCj5A7BT19Vp4qYobKfv70GeTmsMiUNLQL1FEEWWCwef24g1DRd3r9A/GBq9AxP9WM9f7T+DgTvm517hRiohU4Y/IcU8vFEMVVOrCr7JdkPZv0oQPorGKZZ9EmN1Lk0KWmxPBsapHd7tzlvYSxrk4dYaZoNaiNQd/BUL70JQqNRW4sebVLmP/LN4DxR6+H+TBURSNXmxQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Define a data structure for constructing damon_probe's attributes check, namely damon_filter. It is very similar to damos_filter but works only for monitoring purposes. Also embed that into damon_probe, implement essential handling of the link, with fundamental helpers. Signed-off-by: SeongJae Park --- include/linux/damon.h | 36 ++++++++++++++++++++++++++++++++++++ mm/damon/core.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+) diff --git a/include/linux/damon.h b/include/linux/damon.h index 3ba5a31b51769..9c2576f103767 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -721,12 +721,38 @@ struct damon_intervals_goal { unsigned long max_sample_us; }; +/** + * enum damon_filter_type - Type of &struct damon_filter + * + * @DAMON_FILTER_TYPE_ANON: Anonymous pages. + */ +enum damon_filter_type { + DAMON_FILTER_TYPE_ANON, +}; + +/** + * struct damon_filter - DAMON region filter for &struct damon_probe. + * + * @type: Type of the region. + * @matcing: Whether this filter is for the type-matching ones. + * @allow: Whether the @type-@matching ones should pass this filter. + * @list: Siblings list. + */ +struct damon_filter { + enum damon_filter_type type; + bool matching; + bool allow; + struct list_head list; +}; + /** * struct damon_probe - Data region attribute probe. * + * @filters: Filters for assessing if a given region is for this probe. * @list: Siblings list. */ struct damon_probe { + struct list_head filters; struct list_head list; }; @@ -880,6 +906,12 @@ static inline unsigned long damon_sz_region(struct damon_region *r) return r->ar.end - r->ar.start; } +#define damon_for_each_filter(f, p) \ + list_for_each_entry(f, &p->filters, list) + +#define damon_for_each_filter_safe(f, next, p) \ + list_for_each_entry_safe(f, next, &p->filters, list) + #define damon_for_each_probe(p, ctx) \ list_for_each_entry(p, &ctx->probes, list) @@ -927,6 +959,10 @@ static inline unsigned long damon_sz_region(struct damon_region *r) #ifdef CONFIG_DAMON +struct damon_filter *damon_new_filter(enum damon_filter_type type, + bool matching, bool allow); +void damon_add_filter(struct damon_probe *probe, struct damon_filter *f); + struct damon_probe *damon_new_probe(void); void damon_add_probe(struct damon_ctx *ctx, struct damon_probe *probe); diff --git a/mm/damon/core.c b/mm/damon/core.c index 0e55fa70fa5b6..44943d654dcce 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -109,6 +109,31 @@ int damon_select_ops(struct damon_ctx *ctx, enum damon_ops_id id) return err; } +struct damon_filter *damon_new_filter(enum damon_filter_type type, + bool matching, bool allow) +{ + struct damon_filter *filter; + + filter = kmalloc_obj(*filter); + if (!filter) + return NULL; + filter->type = type; + filter->matching = matching; + filter->allow = allow; + INIT_LIST_HEAD(&filter->list); + return filter; +} + +void damon_add_filter(struct damon_probe *p, struct damon_filter *f) +{ + list_add_tail(&f->list, &p->filters); +} + +static void damon_free_filter(struct damon_filter *f) +{ + kfree(f); +} + struct damon_probe *damon_new_probe(void) { struct damon_probe *p; @@ -116,6 +141,7 @@ struct damon_probe *damon_new_probe(void) p = kmalloc_obj(*p); if (!p) return NULL; + INIT_LIST_HEAD(&p->filters); INIT_LIST_HEAD(&p->list); return p; } @@ -132,6 +158,10 @@ static void damon_del_probe(struct damon_probe *p) static void damon_free_probe(struct damon_probe *p) { + struct damon_filter *f, *next; + + damon_for_each_filter_safe(f, next, p) + damon_free_filter(f); kfree(p); } -- 2.47.3