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b=CNyq5rfbKZVfqc1DB9XZ1pKACnvfOTmEVeiW63YXgyMw1dXW89CybvQRdmrglQ55n YxrYuJBxxVgZbCGHdfxOTaS+4cL4gDYu1BYwjDnqEhcNMUzmXUnmu8rL5ApI1jUU4R diO6iridatd4jHFtZEoPCa8ny5RaNHMJH5xtnzlI4HnOiOG4RqRb5jSUeecdPJxh7r AC8mKvNdOWrsFT4f0KGSz989+AWuvM7uYMceGhd+e2hEN4hTURMZsKgVYCUnav73tq W3nCOJtz1Bl7Ajeom8XXfEnY+W8V+Z1by0C9wZ543Fa9HZq1omDkmHa4ApBIiRw7qP x53DFlZ53CeDw== 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 02/28] mm/damon/core: embed damon_probe objects in damon_ctx Date: Tue, 12 May 2026 07:36:17 -0700 Message-ID: <20260512143645.113201-3-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: rspam10 X-Rspamd-Queue-Id: 91E59120002 X-Stat-Signature: zhhf498sfn3m7pbmuy4f7rwcx6o3qwm7 X-HE-Tag: 1778596619-839026 X-HE-Meta: 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 bOFmJOzi Q/Z+UijYaErhTw8LShvDZqwsdirWfxOCHFIjLEf2n+MwAmlBMDEK8ZfymlAzF3OvcRHblEcbbXqRt2rquLKgMzXu0Ozs9WUYzaH44vugnsgYpDIW/DpP/HhUGda5N5LCxXEQ74+M3Bf1QyleCLtmCyZyBrvvvseytouHURFLONYqGgOljxzXkvXIr7ruqLquP6wCjeQbXEL5vKNNPKR0/f87CYEJKlULc2pcVSKz3UM88KxzMzOLNizVcWNS/GcH0c9So/PVHzhlEYHTkn3ubfwdlvQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Let damon_probe objects be able to be installed on a given damon_ctx, by adding a linked list header for storing the objects. Add initialization and cleanup of the new field with helper functions, too. Signed-off-by: SeongJae Park --- include/linux/damon.h | 9 +++++++++ mm/damon/core.c | 38 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 47 insertions(+) diff --git a/include/linux/damon.h b/include/linux/damon.h index 4794931fa2ea3..dc53bc3da74b3 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -857,6 +857,7 @@ struct damon_ctx { /* public: */ struct damon_operations ops; + struct list_head probes; unsigned long addr_unit; unsigned long min_region_sz; bool pause; @@ -909,6 +910,11 @@ static inline unsigned long damon_sz_region(struct damon_region *r) return r->ar.end - r->ar.start; } +#define damon_for_each_probe(p, ctx) \ + list_for_each_entry(p, &ctx->probes, list) + +#define damon_for_each_probe_safe(p, next, ctx) \ + list_for_each_entry_safe(p, next, &ctx->probes, list) #define damon_for_each_region(r, t) \ list_for_each_entry(r, &t->regions_list, list) @@ -951,6 +957,9 @@ static inline unsigned long damon_sz_region(struct damon_region *r) #ifdef CONFIG_DAMON +struct damon_probe *damon_new_probe(void); +void damon_add_probe(struct damon_ctx *ctx, struct damon_probe *probe); + struct damon_region *damon_new_region(unsigned long start, unsigned long end); /* diff --git a/mm/damon/core.c b/mm/damon/core.c index 3a8725e400c6b..8a55cc61d2972 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -113,6 +113,38 @@ int damon_select_ops(struct damon_ctx *ctx, enum damon_ops_id id) return err; } +struct damon_probe *damon_new_probe(void) +{ + struct damon_probe *p; + + p = kmalloc_obj(*p); + if (!p) + return NULL; + INIT_LIST_HEAD(&p->list); + return p; +} + +void damon_add_probe(struct damon_ctx *ctx, struct damon_probe *probe) +{ + list_add_tail(&probe->list, &ctx->probes); +} + +static void damon_del_probe(struct damon_probe *p) +{ + list_del(&p->list); +} + +static void damon_free_probe(struct damon_probe *p) +{ + kfree(p); +} + +static void damon_destroy_probe(struct damon_probe *p) +{ + damon_del_probe(p); + damon_free_probe(p); +} + #ifdef CONFIG_DAMON_DEBUG_SANITY static void damon_verify_new_region(unsigned long start, unsigned long end) { @@ -605,6 +637,8 @@ struct damon_ctx *damon_new_ctx(void) ctx->attrs.min_nr_regions = 10; ctx->attrs.max_nr_regions = 1000; + INIT_LIST_HEAD(&ctx->probes); + ctx->addr_unit = 1; ctx->min_region_sz = DAMON_MIN_REGION_SZ; @@ -627,12 +661,16 @@ static void damon_destroy_targets(struct damon_ctx *ctx) void damon_destroy_ctx(struct damon_ctx *ctx) { struct damos *s, *next_s; + struct damon_probe *p, *next_p; damon_destroy_targets(ctx); damon_for_each_scheme_safe(s, next_s, ctx) damon_destroy_scheme(s); + damon_for_each_probe_safe(p, next_p, ctx) + damon_destroy_probe(p); + kfree(ctx); } -- 2.47.3