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b=CFrwpjEXx3QjHpm3n3Wfpcr8jHjY5MblZBpGiSvjljRutze62QvaU1vckEVgeynfD QdHyIZASpO0/iNJxNdJ+C1s8yMvWfJUSAwU/i5+8BhGlHYO9K9CCDiZZSg9CpeYTMX cdGlodUVWGveioUSBm8rV4iPgBWIwvpk4Gg+T4UyclJRqquRhVWcU8plKdAwZxtSbw eqYT6eqV6B6z+Lhq4BNd8P2AB5mbm9blirI5HMKQORw4XIV5rGSAyS3Hu1PzxPKcVp Qp06UwYbzeiy8/UUkAh0XqR6ZvYXUKttvTOfSlKJpUW1zDZ7EhS6t3mdX+aOhWqdOz BZry8gZ+Qvqzg== 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 03/28] mm/damon/core: introduce damon_filter Date: Tue, 12 May 2026 07:36:18 -0700 Message-ID: <20260512143645.113201-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260512143645.113201-1-sj@kernel.org> References: <20260512143645.113201-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: DD53940006 X-Stat-Signature: 7cdqkzcuyhjiipmg4yq4fzgns33kt76k X-HE-Tag: 1778596619-706312 X-HE-Meta: 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 4Ht7b3qZ 0POkJpVfZX7GGK2wjank3XSX1PlqthDVW/oSGLPMfLnfb2rry4bUcp9nPk4m0oNvXy8dukbxWGR1Rx7KX2wMR258We3iRYjeOVzecnWsJb5IHbr0svD4U9MATuCfc7LJByyIARER9S4/VMqk8BjU1UxJocc46oAaL4Xs9zJBwXNrSZEdLNiU3PDYVDwWVl/YdanqFdcpFuY3dFHURO4DAJDd9nO51zHDSMSlpkkY9StNDCWQF6NKDf3aweSKVOAfqRGjtrj5AEj0gXoaFlDsblYOgTg== 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 dc53bc3da74b3..95b2c508a63ea 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -730,12 +730,38 @@ 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; }; @@ -910,6 +936,12 @@ 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) @@ -957,6 +989,10 @@ 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 8a55cc61d2972..d01417955a3b4 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -113,6 +113,31 @@ 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; @@ -120,6 +145,7 @@ 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; } @@ -136,6 +162,10 @@ 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