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 D2B2C2F1FEF; Sun, 26 Apr 2026 20:52:35 +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=1777236755; cv=none; b=A6aVQjisyWD2zjI4jMzJDxf113BUtO8LEoBJEAsIU0QGu+xgF3hgroa0jFkPujm3RDXzYhkd6i5NB0mv1Q6lExSLRUZ4HyvoOGEpKWGCQzF30L5j/oZxpk2QtPqaXXDfAOiDkK9Ce1BGyFe0XVHFiwMTy2OgqpkUgsAivsuBe5c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777236755; c=relaxed/simple; bh=ssUx+oZtCnXAftQFdGVKJ2duGR6qwdo9mJW3FrliT4o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fQg4EPqvHRIqowiw7ezmxko90JjJjWAhKm0bRq99j+mEEda5Mdwj2K02f+3vRzm1XbgqbSqqNmlCgx3X2j9I2OOMmyQicRegAmmGXaobwYs+SueMiYLTL3NVVwfrSudEZP+EeHlH4AYrzNoOdh83zlqGW0LWu7FxwUJvTjHgYlA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=D4ybWyt1; 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="D4ybWyt1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8E9E8C2BCB4; Sun, 26 Apr 2026 20:52:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777236755; bh=ssUx+oZtCnXAftQFdGVKJ2duGR6qwdo9mJW3FrliT4o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D4ybWyt1ndP5z/2On8DxGztXhJNX5X+YtMrrJCoV2D4wzTwKcgbCmbHnDx6tHubF6 uviyhSgXNMgpPEcU37xIktpHGf3dwx2oR/QyVDZ2MAH1K183q5RLhDKRFyP/b2NAgF 7enksJBYZa6xHYFvU1AI3nUJ+bQ0nqqKqFT6DpRScAoqdBtzMWySbxWJ4txqFwLTdO 3GT0ZWG7VTao4tyPEnIvMHng5vPlAFYZYY3wKI34tYfiK7ZEZeO1575hK5DpGTcMpx MmYSC+iwrmE2RFYcB+IZl66VFLU6CfxJz/7EIvE+4NdaPM1HXfg5KlSpzCju8REm1V J3s3GgfW0fPAA== 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 03/19] mm/damon/core: introduce damon_filter Date: Sun, 26 Apr 2026 13:52:04 -0700 Message-ID: <20260426205222.93895-4-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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org 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 65d7ee0a70ac0..3290792eab547 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -732,12 +732,38 @@ struct damon_intervals_goal { unsigned long max_sample_us; }; +/** + * enum damon_filter_type - Type of &struct damon_filter + * + * @DAMON_TEST_TYPE_ANON: Anonymous pages. + */ +enum damon_filter_type { + DAMON_TEST_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; }; @@ -893,6 +919,12 @@ 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) @@ -940,6 +972,10 @@ 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 861ab977d1edf..170abba8fdf2a 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