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b=WFUVNBJYGo8GJ+nlSDyoHTMLKuEEuU98keMZ2AGVXQTenj6xfcYgVLnHrj2M481eC dPaja58+UYFgsTShSVrUwMLM85x/A5KpstSajf5D9sSJIBmTDUVM6xJsibDDpLeyIP igJwLFtVvvtx+eKwIAe8prraRVNAyGKxhq6xrluZFcfSONUjB7+De3oe2UuGq7OO9A lMusAHSUv6VV+wrhE+MpGDvcMsWdwbb27qQHF5fUJP2hHa6x1MQEzjM2mtmULWI/Jb jXgTWkuI3WTDBVtDQzqGYQVukL+m8LoTQhIFpXYhRHWkh2INbD4gRRTAc3rmkM60oK p5ZeWbwpnPgFA== 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 02/19] mm/damon/core: embed damon_probe objects in damon_ctx Date: Sun, 26 Apr 2026 13:52:03 -0700 Message-ID: <20260426205222.93895-3-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260426205222.93895-1-sj@kernel.org> References: <20260426205222.93895-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 762ED10000A X-Stat-Signature: ryirk8briksq3widsrph9t8ysg4k65n3 X-Rspam-User: X-HE-Tag: 1777236756-213223 X-HE-Meta: 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 HWgi78xK C39gYoxoYHl4kXwZlKlVT6eXuh/FMbjiTgA2aG2XEt7ZN8lsdVKNWpGCNA7ALiXPBUVxTYRM2d2Yrjhka5sQ+cSIi5Vieuj+QnoG27NkpftSrnLoaYVC8pinI7IPMA9LJI4aOnCeyq0+r0x+kCiYiDGAoeau1kTbtPabMvxmds8YKIaMUxfKcvrNQri9yTqOPB4+HAQ7AGCrJ1MNL4bLVx3NE9Ywhdt2Hws7IzSkriBoavTF3Y7j8gAPiCam+uvnk/7ejgzWIXS9OXz3xPpZ0kgjeEw== 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 da2f026eac725..65d7ee0a70ac0 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -859,6 +859,7 @@ struct damon_ctx { /* public: */ struct damon_operations ops; + struct list_head probes; unsigned long addr_unit; unsigned long min_region_sz; bool pause; @@ -892,6 +893,11 @@ 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) @@ -934,6 +940,9 @@ 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); int damon_set_regions(struct damon_target *t, struct damon_addr_range *ranges, diff --git a/mm/damon/core.c b/mm/damon/core.c index f556786597c83..861ab977d1edf 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -109,6 +109,38 @@ 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) { @@ -633,6 +665,8 @@ 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; @@ -653,12 +687,16 @@ 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