From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A219F33DEDD; Sat, 16 May 2026 18:37:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778956645; cv=none; b=aAuqyFdfI3rkfYYs0CRc0P4zKQ4J4jGiYzdx7aVE8hDl4jzaJrgrTLLJYrXOqO3kNnEVslSlD17YYn1edUjgJWWXKWDUMQI8GvogC30Wkm0HS54yNJBAkJ/7zvmeILEPw8Es8CKB3NTAUFw3pBqvnM7gDxU3+Pr4VlS+YVtTqGU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778956645; c=relaxed/simple; bh=9qp2MHSM8s3w0sFukfKdtDY+4dXqqo1Od1wtQQBaYpE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MsfE0ls+WyntEO0cqUyxXhCrECouOvAO3b/FClLOLjEsYu/tAD6g+dLM1DZg5dqGVQkeGXCUEN0uq+cvMbmWm2cmHg33z6BXSEdb33ijsYE5QZtCwF7IBM5lsOiOZM6GmwYJGdYNITLr4JeQiCUR8MkA3jW1NNnUvbcxq2NhpVc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Bw6wvPQL; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Bw6wvPQL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 51BDBC2BCB8; Sat, 16 May 2026 18:37:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778956645; bh=9qp2MHSM8s3w0sFukfKdtDY+4dXqqo1Od1wtQQBaYpE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; 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> Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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