From nobody Tue Dec 16 07:12:36 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 DEA8ACD37B0 for ; Mon, 18 Sep 2023 10:33:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241291AbjIRKdd (ORCPT ); Mon, 18 Sep 2023 06:33:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241324AbjIRKdN (ORCPT ); Mon, 18 Sep 2023 06:33:13 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D817B122 for ; Mon, 18 Sep 2023 03:32:48 -0700 (PDT) Received: from dggpemm100001.china.huawei.com (unknown [172.30.72.53]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4Rq1HK2n1xzNnfv; Mon, 18 Sep 2023 18:29:01 +0800 (CST) Received: from localhost.localdomain (10.175.112.125) by dggpemm100001.china.huawei.com (7.185.36.93) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Mon, 18 Sep 2023 18:32:46 +0800 From: Kefeng Wang To: Andrew Morton CC: , , , , , Zi Yan , Mike Kravetz , , Kefeng Wang Subject: [PATCH 1/6] sched/numa, mm: make numa migrate functions to take a folio Date: Mon, 18 Sep 2023 18:32:08 +0800 Message-ID: <20230918103213.4166210-2-wangkefeng.wang@huawei.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20230918103213.4166210-1-wangkefeng.wang@huawei.com> References: <20230918103213.4166210-1-wangkefeng.wang@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggpemm100001.china.huawei.com (7.185.36.93) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The cpuid(or access time) is stored in the head page for THP, so it is safely to make should_numa_migrate_memory() and numa_hint_fault_latency() to take a folio. This is in preparation for large folio numa balancing. Signed-off-by: Kefeng Wang --- include/linux/sched/numa_balancing.h | 4 ++-- kernel/sched/fair.c | 12 ++++++------ mm/mempolicy.c | 3 ++- 3 files changed, 10 insertions(+), 9 deletions(-) diff --git a/include/linux/sched/numa_balancing.h b/include/linux/sched/num= a_balancing.h index 3988762efe15..a38528c28665 100644 --- a/include/linux/sched/numa_balancing.h +++ b/include/linux/sched/numa_balancing.h @@ -20,7 +20,7 @@ extern void task_numa_fault(int last_node, int node, int = pages, int flags); extern pid_t task_numa_group_id(struct task_struct *p); extern void set_numabalancing_state(bool enabled); extern void task_numa_free(struct task_struct *p, bool final); -extern bool should_numa_migrate_memory(struct task_struct *p, struct page = *page, +extern bool should_numa_migrate_memory(struct task_struct *p, struct folio= *folio, int src_nid, int dst_cpu); #else static inline void task_numa_fault(int last_node, int node, int pages, @@ -38,7 +38,7 @@ static inline void task_numa_free(struct task_struct *p, = bool final) { } static inline bool should_numa_migrate_memory(struct task_struct *p, - struct page *page, int src_nid, int dst_cpu) + struct folio *folio, int src_nid, int dst_cpu) { return true; } diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index cb225921bbca..683cc1e417d7 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1722,12 +1722,12 @@ static bool pgdat_free_space_enough(struct pglist_d= ata *pgdat) * The smaller the hint page fault latency, the higher the possibility * for the page to be hot. */ -static int numa_hint_fault_latency(struct page *page) +static int numa_hint_fault_latency(struct folio *folio) { int last_time, time; =20 time =3D jiffies_to_msecs(jiffies); - last_time =3D xchg_page_access_time(page, time); + last_time =3D xchg_page_access_time(&folio->page, time); =20 return (time - last_time) & PAGE_ACCESS_TIME_MASK; } @@ -1784,7 +1784,7 @@ static void numa_promotion_adjust_threshold(struct pg= list_data *pgdat, } } =20 -bool should_numa_migrate_memory(struct task_struct *p, struct page * page, +bool should_numa_migrate_memory(struct task_struct *p, struct folio *folio, int src_nid, int dst_cpu) { struct numa_group *ng =3D deref_curr_numa_group(p); @@ -1814,16 +1814,16 @@ bool should_numa_migrate_memory(struct task_struct = *p, struct page * page, numa_promotion_adjust_threshold(pgdat, rate_limit, def_th); =20 th =3D pgdat->nbp_threshold ? : def_th; - latency =3D numa_hint_fault_latency(page); + latency =3D numa_hint_fault_latency(folio); if (latency >=3D th) return false; =20 return !numa_promotion_rate_limit(pgdat, rate_limit, - thp_nr_pages(page)); + folio_nr_pages(folio)); } =20 this_cpupid =3D cpu_pid_to_cpupid(dst_cpu, current->pid); - last_cpupid =3D page_cpupid_xchg_last(page, this_cpupid); + last_cpupid =3D page_cpupid_xchg_last(&folio->page, this_cpupid); =20 if (!(sysctl_numa_balancing_mode & NUMA_BALANCING_MEMORY_TIERING) && !node_is_toptier(src_nid) && !cpupid_valid(last_cpupid)) diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 42b5567e3773..39584dc25c84 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -2642,7 +2642,8 @@ int mpol_misplaced(struct page *page, struct vm_area_= struct *vma, unsigned long if (pol->flags & MPOL_F_MORON) { polnid =3D thisnid; =20 - if (!should_numa_migrate_memory(current, page, curnid, thiscpu)) + if (!should_numa_migrate_memory(current, page_folio(page), + curnid, thiscpu)) goto out; } =20 --=20 2.27.0