From mboxrd@z Thu Jan 1 00:00:00 1970 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 CAA4CC43334 for ; Mon, 25 Jul 2022 16:47:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233196AbiGYQrw (ORCPT ); Mon, 25 Jul 2022 12:47:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44412 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232072AbiGYQru (ORCPT ); Mon, 25 Jul 2022 12:47:50 -0400 Received: from mail-qv1-xf34.google.com (mail-qv1-xf34.google.com [IPv6:2607:f8b0:4864:20::f34]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ABE54BE19 for ; Mon, 25 Jul 2022 09:47:47 -0700 (PDT) Received: by mail-qv1-xf34.google.com with SMTP id j11so8813952qvt.10 for ; Mon, 25 Jul 2022 09:47:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cmpxchg-org.20210112.gappssmtp.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=ueOMTo6DsQCvnulLJ7Rsqpth0YKKV57efxM+awobwkc=; b=1SD4nF22NDrVthsvc/CcEaNX0GsOg8NrfWYQauQ6kZ74/Cf5YJX7Qk7C9QYuipn3dc /75txsFW7Y+hWMthAHT7xUpXGfNxA3+uwyKDdnPOvRjLAjoNosLPlXssiDxAdYS7n7Jg UwVDAE+eUF9u+ZhvysT3aXuegZZaQVBosX2fekmPN6pfxTmUviDaE/y1MZN7SG1p6PFN jrMEAAfWkhyrGkTrkhwlrN4NgjBSnR+iOqCXqUKe4nW4/ddOFDf7L7MeHWR36Gz2bm0w HWRIuOJKtD/Ge3FM/1ggPWvXsLLCav4plXeFanzurA9vEmbG5hSVzxuFIwafwUgVAol0 YdxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=ueOMTo6DsQCvnulLJ7Rsqpth0YKKV57efxM+awobwkc=; b=1PNYjzN9wSAk6W5NfSeTW+YO7E3cmAX1eE2kDMbzibMxaHFJ2myqKs8pvwulaEwE5e s/5tGkrH+vXPZuAP6o6jBVrl3rIwHUkuvTfgXr2vsWRSk1y0M1uwBvH7L5/KSDLddPQc wE6HZ1+ad98MNjYyNkjrX4u+qSVC/fDzdELcMY0ZS5tjRpRzCdHUGK+AIy9VK7BOH1Sn Xzp4/YZC32ITQM7qP7Nkm89+1t0nvjJjntktKxCq+YWQvD0e2rWxeLkQZhelBMhwKG3j 5wIRefxAt+J12Re08RAgdSmk0uBMqoWXdsysT0hiFH2+AwVbGKMyXvZf6DTAUMQqzZBh pejw== X-Gm-Message-State: AJIora/Uigre6R3Y2yD6/+SfsMPunb03d4WtU8dgRWRWMBrlYzp6G9mU reo60c8Wx70LVlLVBx2dKuFWGQ== X-Google-Smtp-Source: AGRyM1tsn0XMOPnrteAVb22JR6gvBwTiHBtpn90Nl3EtZupeVtIltfU2MMOYYeSMUPrNGhQqxw9BoQ== X-Received: by 2002:a05:6214:d81:b0:45a:e07e:6bcb with SMTP id e1-20020a0562140d8100b0045ae07e6bcbmr10926274qve.29.1658767666878; Mon, 25 Jul 2022 09:47:46 -0700 (PDT) Received: from localhost ([2620:10d:c091:480::1:994f]) by smtp.gmail.com with ESMTPSA id q6-20020a05620a2a4600b006b633dc839esm6966288qkp.66.2022.07.25.09.47.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Jul 2022 09:47:46 -0700 (PDT) Date: Mon, 25 Jul 2022 12:47:45 -0400 From: Johannes Weiner To: Chengming Zhou Cc: surenb@google.com, mingo@redhat.com, peterz@infradead.org, tj@kernel.org, corbet@lwn.net, akpm@linux-foundation.org, rdunlap@infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, songmuchun@bytedance.com, cgroups@vger.kernel.org Subject: Re: [PATCH 6/9] sched/psi: save percpu memory when !psi_cgroups_enabled Message-ID: References: <20220721040439.2651-1-zhouchengming@bytedance.com> <20220721040439.2651-7-zhouchengming@bytedance.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220721040439.2651-7-zhouchengming@bytedance.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jul 21, 2022 at 12:04:36PM +0800, Chengming Zhou wrote: > We won't use cgroup psi_group when !psi_cgroups_enabled, so don't > bother to alloc percpu memory and init for it. > > Also don't need to migrate task PSI stats between cgroups in > cgroup_move_task(). > > Signed-off-by: Chengming Zhou Acked-by: Johannes Weiner