From nobody Thu Sep 18 14:09:40 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BDC32C4708C for ; Mon, 5 Dec 2022 23:09:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232869AbiLEXJJ (ORCPT ); Mon, 5 Dec 2022 18:09:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231892AbiLEXIk (ORCPT ); Mon, 5 Dec 2022 18:08:40 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 030D46544 for ; Mon, 5 Dec 2022 15:08:40 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A91E1B815A3 for ; Mon, 5 Dec 2022 23:08:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D62FDC433D6; Mon, 5 Dec 2022 23:08:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1670281717; bh=A+37s6JJXYN+1C0NX4ExPJftU7PAKfFK4zc/BA9nVsg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OZtT+uKK4/4lwOI6eMAjYSBULmKtBrpMkQl2IHAUITb7EXo98LhCroIQJT8y9r+hV RjErPSimYQk6wI+oQHnJ2W8q1HKG7VsvuN3Z+CN8V9E9/92jWWK9WujY4iRGqptbr9 dZ1X1kwT3xUlFezXuwH46XHCKBojafP0YCqEFGFR1vZNAWcV05AY87wJz86mrDFUu8 7AT3dCObaN7p4ljYZ0j2i9jOwjEn4aYoNgDh58H+HC36IVp3cySUm5RJG8jNb1gCrq Qpf8bWCAA+bJNi9KZjsPhX+0mk7H/hdAO4opS9KDOUtLyh6k3SSBP+kytCHh8F6y1J YJYBKx0ps72Uw== From: SeongJae Park To: Andrew Morton Cc: damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, SeongJae Park Subject: [PATCH 02/11] mm/damon/paddr: support DAMOS filters Date: Mon, 5 Dec 2022 23:08:21 +0000 Message-Id: <20221205230830.144349-3-sj@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221205230830.144349-1-sj@kernel.org> References: <20221205230830.144349-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Implement support of the DAMOS filters in the physical address space monitoring operations set, for all DAMOS actions that it supports including 'pageout', 'lru_prio', and 'lru_deprio'. Signed-off-by: SeongJae Park --- mm/damon/paddr.c | 71 ++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 62 insertions(+), 9 deletions(-) diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index e1a4315c4be6..ebd1905eed6f 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -202,7 +202,47 @@ static unsigned int damon_pa_check_accesses(struct dam= on_ctx *ctx) return max_nr_accesses; } =20 -static unsigned long damon_pa_pageout(struct damon_region *r) +static bool __damos_pa_filter_out(struct damos_filter *filter, + struct page *page) +{ + bool matched =3D false; + struct mem_cgroup *memcg; + + switch (filter->type) { + case DAMOS_FILTER_TYPE_ANON: + matched =3D PageAnon(page); + break; + case DAMOS_FILTER_TYPE_MEMCG: + rcu_read_lock(); + memcg =3D page_memcg_check(page); + if (!memcg) + matched =3D false; + else + matched =3D filter->memcg_id =3D=3D mem_cgroup_id(memcg); + rcu_read_unlock(); + break; + default: + break; + } + + return matched =3D=3D filter->matching; +} + +/* + * damos_pa_filter_out - Return true if the page should be filtered out. + */ +static bool damos_pa_filter_out(struct damos *scheme, struct page *page) +{ + struct damos_filter *filter; + + damos_for_each_filter(filter, scheme) { + if (__damos_pa_filter_out(filter, page)) + return true; + } + return false; +} + +static unsigned long damon_pa_pageout(struct damon_region *r, struct damos= *s) { unsigned long addr, applied; LIST_HEAD(page_list); @@ -213,6 +253,11 @@ static unsigned long damon_pa_pageout(struct damon_reg= ion *r) if (!page) continue; =20 + if (damos_pa_filter_out(s, page)) { + put_page(page); + continue; + } + ClearPageReferenced(page); test_and_clear_page_young(page); if (isolate_lru_page(page)) { @@ -232,7 +277,7 @@ static unsigned long damon_pa_pageout(struct damon_regi= on *r) } =20 static inline unsigned long damon_pa_mark_accessed_or_deactivate( - struct damon_region *r, bool mark_accessed) + struct damon_region *r, struct damos *s, bool mark_accessed) { unsigned long addr, applied =3D 0; =20 @@ -241,6 +286,12 @@ static inline unsigned long damon_pa_mark_accessed_or_= deactivate( =20 if (!page) continue; + + if (damos_pa_filter_out(s, page)) { + put_page(page); + continue; + } + if (mark_accessed) mark_page_accessed(page); else @@ -251,14 +302,16 @@ static inline unsigned long damon_pa_mark_accessed_or= _deactivate( return applied * PAGE_SIZE; } =20 -static unsigned long damon_pa_mark_accessed(struct damon_region *r) +static unsigned long damon_pa_mark_accessed(struct damon_region *r, + struct damos *s) { - return damon_pa_mark_accessed_or_deactivate(r, true); + return damon_pa_mark_accessed_or_deactivate(r, s, true); } =20 -static unsigned long damon_pa_deactivate_pages(struct damon_region *r) +static unsigned long damon_pa_deactivate_pages(struct damon_region *r, + struct damos *s) { - return damon_pa_mark_accessed_or_deactivate(r, false); + return damon_pa_mark_accessed_or_deactivate(r, s, false); } =20 static unsigned long damon_pa_apply_scheme(struct damon_ctx *ctx, @@ -267,11 +320,11 @@ static unsigned long damon_pa_apply_scheme(struct dam= on_ctx *ctx, { switch (scheme->action) { case DAMOS_PAGEOUT: - return damon_pa_pageout(r); + return damon_pa_pageout(r, scheme); case DAMOS_LRU_PRIO: - return damon_pa_mark_accessed(r); + return damon_pa_mark_accessed(r, scheme); case DAMOS_LRU_DEPRIO: - return damon_pa_deactivate_pages(r); + return damon_pa_deactivate_pages(r, scheme); case DAMOS_STAT: break; default: --=20 2.25.1