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 8630D2EF652; 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=UQqnk8TBN5Tu6FSH8MyFtTOp/ocf/HDmHrZY2eTsrLG6bwlLchvE39jI5JJKB9/GVex8OsSs6w8qzLON0WEUhMPBcDX0X/8mqoJyNrM+BLrCGcce9kbIP3p2pDxoH8kx7D/ms4YxbgsRIxIbFsUX0I2JrzunJ9ISSBmtz/4Uftw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777236755; c=relaxed/simple; bh=MBnxsMb7aVVsu9fBOqUd4whtHJLGz98akhVkcLMVfko=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hj+4TCgqvRmOF5f0dZ4pVbZBV1T6zTZJ7gemfgb/hlj9NIgqQtE1ffP/0dA05iq9QqNWC9oi6psVZAJa1wkFE6R9Tv0mgEnF3eXCUoZF5fwjxKzT5qQ8cRE9KStc//hFmjShsd1q8sNAig7oaqo8FRWCNv4MeJSWYwwOwrfiyAA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WFUVNBJY; 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="WFUVNBJY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3E900C2BCC7; 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=MBnxsMb7aVVsu9fBOqUd4whtHJLGz98akhVkcLMVfko=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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