From patchwork Thu Mar 30 19:17:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yosry Ahmed X-Patchwork-Id: 13194745 X-Patchwork-Delegate: kuba@kernel.org 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 B8F40C77B60 for ; Thu, 30 Mar 2023 19:18:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232006AbjC3TSI (ORCPT ); Thu, 30 Mar 2023 15:18:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47690 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232022AbjC3TSH (ORCPT ); Thu, 30 Mar 2023 15:18:07 -0400 Received: from mail-yw1-x114a.google.com (mail-yw1-x114a.google.com [IPv6:2607:f8b0:4864:20::114a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 590DDE1AF for ; Thu, 30 Mar 2023 12:18:06 -0700 (PDT) Received: by mail-yw1-x114a.google.com with SMTP id 00721157ae682-5416d3a321eso198540897b3.12 for ; Thu, 30 Mar 2023 12:18:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; t=1680203885; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=ECd9n7cK9XN/T+IJ39MyPXAm65DzgHuyZCFnDGQgZIE=; b=tY0E3oybgVZIuKKOOKBykm8/TKbf2scexLJVT3DkzJcaMo8pgAVQKd31VkYqY1QVPJ mHo+yh2Z2e/UWhIAS6NyKjgzsMFfM3Q7bRmRT9xetX5hDAZEg0lz49jvXxYxOEOA0GHz 2iOR7gvTKjdYv9QT9UofKbbkFs9vSWVQ0TKS3904q473sNNcjSfvya1m1B2ab+CL/f+M 4qtYTT2pypw3Co5Bobg3nKNc5an7wdNYyXFt6rny9eUWrmoVflUhZJQGBV9r+u9oNXbf thlMA7X4kUIdycQp/zBF4S4OoaK6pqFmZjXA4rakf85jUKtTz9rXXIDv36itoKwLwzmv vt/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680203885; 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=ECd9n7cK9XN/T+IJ39MyPXAm65DzgHuyZCFnDGQgZIE=; b=eci8iolKXDAoCrQwoFmb09ZzxW3/okdQYxtftb6qsAFA6egbNqz7qS4qlkAE4NSkuU uJl44rhc0Ymt34oXQ64eDeFr+8ZzVTE0SIx3A/uVNyVJJNuIz1muj5TpmvfyIW3Ls8Zm bBl1yLasz11XNuXmdMndFYHlKhxWm6Ar71lX/+zJSxaqe1hgjRrGmLedqT3b/IvpWHmE heoVqaNEtPK/Mh6eFVElgqPOiF9o1wdcgW3olLpOFu628/cQNvNJPXkhoAorRkyVYSWF RSpfU0tySlb8NhJP1leCGzegJmKFqO1I2xvGMg0MOr5MK+fvfvDiShQHDHANagAx6dBo Ooeg== X-Gm-Message-State: AAQBX9fLLWrelM7iU7GuxdhavElmYpaXsRc38NBf9jhCeGByzzbHA2zL lthlhG4rdhLNVvi/oNpOjXH96vTpdOZi6DtX X-Google-Smtp-Source: AKy350aEWgmUGoq47vtgVPSLObUE1OHXFIc1JYGvZjZHSdRsfuGe4z8jTEoHLVbNJzm7tfhcDcAxLa1st977h/QM X-Received: from yosry.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:2327]) (user=yosryahmed job=sendgmr) by 2002:a25:d1d8:0:b0:b6d:fc53:c5c0 with SMTP id i207-20020a25d1d8000000b00b6dfc53c5c0mr4650822ybg.1.1680203885608; Thu, 30 Mar 2023 12:18:05 -0700 (PDT) Date: Thu, 30 Mar 2023 19:17:54 +0000 In-Reply-To: <20230330191801.1967435-1-yosryahmed@google.com> Mime-Version: 1.0 References: <20230330191801.1967435-1-yosryahmed@google.com> X-Mailer: git-send-email 2.40.0.348.gf938b09366-goog Message-ID: <20230330191801.1967435-2-yosryahmed@google.com> Subject: [PATCH v3 1/8] cgroup: rename cgroup_rstat_flush_"irqsafe" to "atomic" From: Yosry Ahmed To: Tejun Heo , Josef Bacik , Jens Axboe , Zefan Li , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Muchun Song , Andrew Morton , " =?utf-8?q?Michal_Koutn=C3=BD?= " Cc: Vasily Averin , cgroups@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, bpf@vger.kernel.org, Yosry Ahmed Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org cgroup_rstat_flush_irqsafe() can be a confusing name. It may read as "irqs are disabled throughout", which is what the current implementation does (currently under discussion [1]), but is not the intention. The intention is that this function is safe to call from atomic contexts. Name it as such. Suggested-by: Johannes Weiner Signed-off-by: Yosry Ahmed Acked-by: Shakeel Butt Acked-by: Johannes Weiner --- include/linux/cgroup.h | 2 +- kernel/cgroup/rstat.c | 4 ++-- mm/memcontrol.c | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 3410aecffdb4..885f5395fcd0 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -692,7 +692,7 @@ static inline void cgroup_path_from_kernfs_id(u64 id, char *buf, size_t buflen) */ void cgroup_rstat_updated(struct cgroup *cgrp, int cpu); void cgroup_rstat_flush(struct cgroup *cgrp); -void cgroup_rstat_flush_irqsafe(struct cgroup *cgrp); +void cgroup_rstat_flush_atomic(struct cgroup *cgrp); void cgroup_rstat_flush_hold(struct cgroup *cgrp); void cgroup_rstat_flush_release(void); diff --git a/kernel/cgroup/rstat.c b/kernel/cgroup/rstat.c index 831f1f472bb8..d3252b0416b6 100644 --- a/kernel/cgroup/rstat.c +++ b/kernel/cgroup/rstat.c @@ -241,12 +241,12 @@ __bpf_kfunc void cgroup_rstat_flush(struct cgroup *cgrp) } /** - * cgroup_rstat_flush_irqsafe - irqsafe version of cgroup_rstat_flush() + * cgroup_rstat_flush_atomic- atomic version of cgroup_rstat_flush() * @cgrp: target cgroup * * This function can be called from any context. */ -void cgroup_rstat_flush_irqsafe(struct cgroup *cgrp) +void cgroup_rstat_flush_atomic(struct cgroup *cgrp) { unsigned long flags; diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 5abffe6f8389..0205e58ea430 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -642,7 +642,7 @@ static void __mem_cgroup_flush_stats(void) return; flush_next_time = jiffies_64 + 2*FLUSH_TIME; - cgroup_rstat_flush_irqsafe(root_mem_cgroup->css.cgroup); + cgroup_rstat_flush_atomic(root_mem_cgroup->css.cgroup); atomic_set(&stats_flush_threshold, 0); spin_unlock_irqrestore(&stats_flush_lock, flag); }