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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D4D6C433EF for ; Tue, 5 Apr 2022 18:21:18 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D7AD56B0072; Tue, 5 Apr 2022 14:21:07 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D29FE6B0073; Tue, 5 Apr 2022 14:21:07 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C197D6B0074; Tue, 5 Apr 2022 14:21:07 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.26]) by kanga.kvack.org (Postfix) with ESMTP id B41F16B0072 for ; Tue, 5 Apr 2022 14:21:07 -0400 (EDT) Received: from smtpin11.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 8162660FB4 for ; Tue, 5 Apr 2022 18:20:57 +0000 (UTC) X-FDA: 79323641754.11.F4E8751 Received: from mail-yb1-f201.google.com (mail-yb1-f201.google.com [209.85.219.201]) by imf07.hostedemail.com (Postfix) with ESMTP id F2FB540020 for ; Tue, 5 Apr 2022 18:20:56 +0000 (UTC) Received: by mail-yb1-f201.google.com with SMTP id b11-20020a5b008b000000b00624ea481d55so10958604ybp.19 for ; Tue, 05 Apr 2022 11:20:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=FMzoEUuR7kMFf/p41WoCKSGPV5DJJawQawoS8VMfGf8=; b=jYIKh2vp9qzfZy+6UQTsSiswFuPf0yt2j5lgrCOf9U4Asuhj5voE7FXq3/eWuXqgvw ULBXZRop2ngkb2O9nMzY1uLHvP1LWd/x8fzu2w61irvv5uKNhUem37HnvK9XEO/Y4aBx 9b7Wyk5tsV19GACNlZAkOIEnABxxWmf+iLah22Nnlus35H6foWOxb5WxSZkRlsXquc4z 1+6aMH0AAQnFuIURELqM35d6UqL9WtphobKOT1uGSXpTe1a2gueSkkSlLq6xTc0yD7kQ l8K9Xu5eI3oEOggGCqayqCvc3ltRZ/okdmXjE7CFxYGUXTnqxiLonOjPprzJPBS9ijEI V/Wg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=FMzoEUuR7kMFf/p41WoCKSGPV5DJJawQawoS8VMfGf8=; b=Eo14pWfqVOpx73rEaJYoqgZAhldA5rAXhQKGfpY6hxRfEI4UJteNWXZC+bb1e0E/P0 RkpBhjrskr2xpgRfH97ONO6CTnSZBNZciZnxOIQcP/rl9TaT6oil0kWQf7y/gzyLV/cz Qt8ghi3HQKNg3MgduB4HWsYvDtzcUBN7UynpDLEkpnGdOiOTwTAjlP4U0IXyZEY6UAZh 7NPKh+n2KmYxsV+KBt+cQpkIDxOTXoR8HKjanY7lnudcrZFpDxTBXlIE7ABcJ+mvJY15 4kwwc4vQqIJHehcQ25Uhdz+QHXxtDBQZcucC+SMUUGOF55ztx+gZ9oYaqartm0E9t18c l5NA== X-Gm-Message-State: AOAM532fkDdyh3dOIbenlStnVGAygjzV6UlaGBMe/QF6IBys3Wq/ehAi hlUUHGEi0qB2G8IojnHYhcce/pvPzbFoUQ== X-Google-Smtp-Source: ABdhPJyRJ8U3oDgsQlN6kSYTXqYVSNyGjuN383mqMzuG5X15/R39UeByfybT+kI/2S49Zn8l8ChvoM2vPwKpZg== X-Received: from shakeelb.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:28b]) (user=shakeelb job=sendgmr) by 2002:a25:3d42:0:b0:63d:c88a:faea with SMTP id k63-20020a253d42000000b0063dc88afaeamr3609443yba.171.1649182856090; Tue, 05 Apr 2022 11:20:56 -0700 (PDT) Date: Tue, 5 Apr 2022 18:20:53 +0000 In-Reply-To: <20220403020833.26164-1-richard.weiyang@gmail.com> Message-Id: <20220405182053.wvcewrm5ovi3qeev@google.com> Mime-Version: 1.0 References: <20220403020833.26164-1-richard.weiyang@gmail.com> Subject: Re: [PATCH] mm/memcg: non-hierarchical mode is deprecated From: Shakeel Butt To: Wei Yang Cc: akpm@linux-foundation.org, cgroups@vger.kernel.org, linux-mm@kvack.org, Roman Gushchin , Johannes Weiner Content-Type: text/plain; charset="us-ascii" X-Stat-Signature: gr3yozjxn1g5wytxkx3jfzo48qbmz8y9 Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=jYIKh2vp; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf07.hostedemail.com: domain of 3iIhMYggKCOMXMFPJJQGLTTLQJ.HTRQNSZc-RRPaFHP.TWL@flex--shakeelb.bounces.google.com designates 209.85.219.201 as permitted sender) smtp.mailfrom=3iIhMYggKCOMXMFPJJQGLTTLQJ.HTRQNSZc-RRPaFHP.TWL@flex--shakeelb.bounces.google.com X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: F2FB540020 X-HE-Tag: 1649182856-860994 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sun, Apr 03, 2022 at 02:08:33AM +0000, Wei Yang wrote: > After commit bef8620cd8e0 ("mm: memcg: deprecate the non-hierarchical > mode"), we won't have a NULL parent except root_mem_cgroup. And this > case is handled when (memcg == root). > > Signed-off-by: Wei Yang > CC: Roman Gushchin > CC: Johannes Weiner Reviewed-by: Shakeel Butt