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b=Bw6wvPQLdsJaJizOt333zj+YEXZGuQp/R+IN+ZGEEyhPIguIJLOM3+JgFBFxg+ZJd 0kURv5jMOCCe0Mx/2aRuuEKYYM/xxQKUqhfhwnuzOFNFUwz4xwggQ9k4IiKKy/2dZ6 7rdD3Iet4yMtKXu45uWakL4NFH1V7wueUvx1gQmivjJzEZ+KaMD03FywtERAVTF7E7 6r5yfG9OMXVlYx7ovBZwNcfxw2PeAMX3xI0O6Pj+Ee8aNtiRCE+b/BSzx+8dAiPQR9 VGqpHtGEZQToRKE7bSDTYpa0VcAvnjNKmwJsVGPswoDuzqX3oEbiMOSYXsZH56EdlR azn6CgVwxd9Eg== 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 v3 03/28] mm/damon/core: introduce damon_filter Date: Sat, 16 May 2026 11:36:44 -0700 Message-ID: <20260516183712.81393-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260516183712.81393-1-sj@kernel.org> References: <20260516183712.81393-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: qtruibfoicxkk8bih77mj7t4tpre5p9i X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 9072840011 X-Rspam-User: X-HE-Tag: 1778956646-835977 X-HE-Meta: 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 DTMJlO8T XEpJMvm6AqYEsboUrud9nRy9Qvzqs/fk/g14vQXRuezRiXgNscj8yp63Rr95WJT7gtCOtz149KWsfZL53CXBMcp4qvYwXZ6s/0Mr+wcCRcE/l1e9ED0x/QTzozBbbVZHAsD6nZrfWq4MGTphEUMYpyzszmG1bF6hIQdYsf1s98Bm2H2lICXkM3IDKhCkjHFeSoppF0jffv47uT08R9r6ojkSYuzN5c/hJLYI6tEr0/TuA+Dvt/zTNVv2X5P3wdj5VuROvno9lH45i6mYU1SqCJAiiGw== 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 d15f47a321d88..32005b8b1f8cd 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. + * @matching: 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