From patchwork Mon Apr 3 22:03:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yosry Ahmed X-Patchwork-Id: 13198869 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 D3E08C77B62 for ; Mon, 3 Apr 2023 22:04:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233766AbjDCWEJ (ORCPT ); Mon, 3 Apr 2023 18:04:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57462 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233690AbjDCWDy (ORCPT ); Mon, 3 Apr 2023 18:03:54 -0400 Received: from mail-pg1-x54a.google.com (mail-pg1-x54a.google.com [IPv6:2607:f8b0:4864:20::54a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E28DE40F6 for ; Mon, 3 Apr 2023 15:03:46 -0700 (PDT) Received: by mail-pg1-x54a.google.com with SMTP id 194-20020a6301cb000000b00513c951ff2bso2235209pgb.10 for ; Mon, 03 Apr 2023 15:03:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; t=1680559426; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=hNJBwGVVZOmg9VOOVOlV/1s5wuc6P4CJY0BTT3hY1AM=; b=PLSbfUpOYbUqIYWD0lVUspaLdyltho/9MJ34jFGgaIu6ps/MvfYgJtvBICL0/UsCg8 Eo1bG+CpaO1W/JWBORyxWnVMwYforRdWFpLcNNnnTr6WckgWqX8cpRotu3SoW3jnNsSm PizUX3QJilPLsW/5Gft8jVYazARk9Ut3n4G+JQv0SopU/bBBAHVR6m+9um87Q19Q1oES JkmqUr13ZWZzVKrKo78OL0QtsqIHc61QjUXFxRzUrqMEuTOHPCZ7yp3LqOiDIHhK80Se /pN6/hsU4YI1MwbFb/U4Ozh2+s+tmlO9zkIjBJHts6ziq2HpcgAoxfLImivvQtFY+h9I 09eg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680559426; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=hNJBwGVVZOmg9VOOVOlV/1s5wuc6P4CJY0BTT3hY1AM=; b=bPIt4zjCWWOYnrffwaV9cQt2l1uvsgQiI8kILcyj0FT3hLBbOpfuy/VNue/ocgaAFy jgBZm3kK/6NPCQmyIpoI3lrvkGsvh6VKqAcJLxawni7ycsUN1HvuExVyqHpQhSBZ2EUb NWS6lxm1Dv8GmyNkxdh/R53c6zNuWh4Oc+0dO0h8XmS14m7xg+8fnDrqncSDZJyyoUIZ v40HhniTuEIfl4jDA+bGMFM6u7Vvo1kP21HmAwdQq/IfDL+5jqf0OkquafNH4uRGJZl0 kUyQuFSFC8Qh6495pCj/3tdcEKJndF8jtFwrYlCSIhlA8GJedbKAFGiGd2mJwxxoqKnm Ba+Q== X-Gm-Message-State: AAQBX9f9BcH8yAd4ps1PvojMz/Wladfbu5cfvXbBr1FGFj12QM0OdM5u nY9ScnQGdWxwIFVqBbkU/1be7jyARi3/kzNv X-Google-Smtp-Source: AKy350YqjuJx0cPEvkhGlL8e3G8Xhx/mHcAIKY7AoMYKpy6RY5t/7e2yXmvxs0CQV10HpQGcD3F9B9OJJYiZoWXv X-Received: from yosry.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:2327]) (user=yosryahmed job=sendgmr) by 2002:a17:90b:4cce:b0:23b:5155:309f with SMTP id nd14-20020a17090b4cce00b0023b5155309fmr7558849pjb.0.1680559426408; Mon, 03 Apr 2023 15:03:46 -0700 (PDT) Date: Mon, 3 Apr 2023 22:03:36 +0000 In-Reply-To: <20230403220337.443510-1-yosryahmed@google.com> Mime-Version: 1.0 References: <20230403220337.443510-1-yosryahmed@google.com> X-Mailer: git-send-email 2.40.0.348.gf938b09366-goog Message-ID: <20230403220337.443510-5-yosryahmed@google.com> Subject: [PATCH mm-unstable RFC 4/5] memcg: remove mem_cgroup_flush_stats_atomic() From: Yosry Ahmed To: Alexander Viro , Christian Brauner , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Muchun Song , Andrew Morton Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org, Yosry Ahmed Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Previous patches removed all callers of mem_cgroup_flush_stats_atomic(). Remove the function and simplify the code. Signed-off-by: Yosry Ahmed Acked-by: Shakeel Butt --- include/linux/memcontrol.h | 5 ----- mm/memcontrol.c | 24 +++++------------------- 2 files changed, 5 insertions(+), 24 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 222d7370134c7..00a88cf947e14 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -1038,7 +1038,6 @@ static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec, } void mem_cgroup_flush_stats(void); -void mem_cgroup_flush_stats_atomic(void); void mem_cgroup_flush_stats_ratelimited(void); void __mod_memcg_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, @@ -1537,10 +1536,6 @@ static inline void mem_cgroup_flush_stats(void) { } -static inline void mem_cgroup_flush_stats_atomic(void) -{ -} - static inline void mem_cgroup_flush_stats_ratelimited(void) { } diff --git a/mm/memcontrol.c b/mm/memcontrol.c index e7fe18c0c0ef2..33339106f1d9b 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -638,7 +638,7 @@ static inline void memcg_rstat_updated(struct mem_cgroup *memcg, int val) } } -static void do_flush_stats(bool atomic) +static void do_flush_stats(void) { /* * We always flush the entire tree, so concurrent flushers can just @@ -651,30 +651,16 @@ static void do_flush_stats(bool atomic) WRITE_ONCE(flush_next_time, jiffies_64 + 2*FLUSH_TIME); - if (atomic) - cgroup_rstat_flush_atomic(root_mem_cgroup->css.cgroup); - else - cgroup_rstat_flush(root_mem_cgroup->css.cgroup); + cgroup_rstat_flush(root_mem_cgroup->css.cgroup); atomic_set(&stats_flush_threshold, 0); atomic_set(&stats_flush_ongoing, 0); } -static bool should_flush_stats(void) -{ - return atomic_read(&stats_flush_threshold) > num_online_cpus(); -} - void mem_cgroup_flush_stats(void) { - if (should_flush_stats()) - do_flush_stats(false); -} - -void mem_cgroup_flush_stats_atomic(void) -{ - if (should_flush_stats()) - do_flush_stats(true); + if (atomic_read(&stats_flush_threshold) > num_online_cpus()) + do_flush_stats(); } void mem_cgroup_flush_stats_ratelimited(void) @@ -689,7 +675,7 @@ static void flush_memcg_stats_dwork(struct work_struct *w) * Always flush here so that flushing in latency-sensitive paths is * as cheap as possible. */ - do_flush_stats(false); + do_flush_stats(); queue_delayed_work(system_unbound_wq, &stats_flush_dwork, FLUSH_TIME); }