From patchwork Wed Mar 8 13:14:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Newman X-Patchwork-Id: 6301 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp331137wrd; Wed, 8 Mar 2023 05:30:03 -0800 (PST) X-Google-Smtp-Source: AK7set8XYz9wZHVnynVCLtEj8+TQ1ukhYBJ2e+nVsFOjEHOzbj9bmM1GYtDRUs93tgdnNTOezSu2 X-Received: by 2002:a17:907:9702:b0:8b1:2cdb:b8dd with SMTP id jg2-20020a170907970200b008b12cdbb8ddmr20483009ejc.58.1678282203019; Wed, 08 Mar 2023 05:30:03 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1678282203; cv=none; d=google.com; s=arc-20160816; b=nuZITJgpCznKKCtLqT2Nz6B6YsyjI7+5x07gtoQXswkUG7yn513+TIa2beRK++TgBe RdTNje89YBtPfvcheOPqudscmyP2Nsrr7Xfwp7RCCSd2w0P88RCZMYsAHSvGbcuAuEgu KtXz0pOIzVYfW1IMRL+TF5DQ+Br2FboK9MxzItagfBDIhhVV+jx8kfD71/eT8x2+AwMR yYG2HNXqgwqw/qqu2pPboBitX4OGIGm41xmXytTzdW3/pQltwYh4ySS1XW154uOqamcN wFSqkIdtLfTOENgUlGyGxduxqgcW0RD6vLPPZ3tJngaMGRP/hiVpyUcMBiJTt3KvxUaC KzYA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:from:subject:message-id:mime-version:date :dkim-signature; bh=FwUyXbFoeylnGL1ofVQkFUgeUX2pI6+3MVKKMokxUts=; b=Zhcy7+FHJB6PnDrdDOtBZDbmdMhgOSJixJc478OxtkE4XEDIVes+rN35LOPBkaVXMd g5CDQjTwz/Li1Xp34VgXmv2433C2X+N6+dujGYZdIOFoOz0GXP219jgGFVbUKhpzMiW0 RA5AH/pTY+XcTOjJqQx58YFOJCOfGLuG/L4fqGcuxJ9VKenbacE0gAREBElVL5xATLrU YGIGmPPBU+bDZkEhW/Oi49dWNn3X6aaqrqZg1W0bBH02n2cvMTJ5gVl3hr6qYS0SEJMm 6oDtAYNcom4dmMtlG2ZWM0pnn8dzrWA+/bsl/EiRb6IhDhYTRyG1OErRZLLlz4mU2K3V ZqFQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@google.com header.s=20210112 header.b="P/AceM2m"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id d9-20020a170906304900b008d20a6a9d98si642939ejd.279.2023.03.08.05.29.40; Wed, 08 Mar 2023 05:30:03 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20210112 header.b="P/AceM2m"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230096AbjCHNSp (ORCPT + 99 others); Wed, 8 Mar 2023 08:18:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43768 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231322AbjCHNS0 (ORCPT ); Wed, 8 Mar 2023 08:18:26 -0500 Received: from mail-wm1-x34a.google.com (mail-wm1-x34a.google.com [IPv6:2a00:1450:4864:20::34a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56ED38F522 for ; Wed, 8 Mar 2023 05:15:05 -0800 (PST) Received: by mail-wm1-x34a.google.com with SMTP id e22-20020a05600c219600b003e000facbb1so936560wme.9 for ; Wed, 08 Mar 2023 05:15:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; t=1678281303; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=FwUyXbFoeylnGL1ofVQkFUgeUX2pI6+3MVKKMokxUts=; b=P/AceM2m1q0TKRqeY3MH0yGWYqLGcsWLOaA8UVdPe/Pf0xJAgW/ftIWNkrk9KX1Xme GpLQJemX0p/2UvbZX3iFf2EqvbEnr7n9ZuII9s9Rwto1i8J+evd9V2bT/14cY/DiSk6I vH8jq3SZLrdeFP7zwnUtLdIh0FA6ZzAahVbNvJxDuPvRQZwWdZpuA5mgfrjNCj2zZNS5 fQ5YbcjGl02CcywSwf926mx4vrk0DKcgpOz8geMOguQZqwlvNrluSlr6aBTxBzJgPr+t kVq8XPoCOjTqU2L+gzm70pPTxChnq7kfueY69yrE6dKZBh0w7GYekMPMlzIkkeVVSEVq W9Vw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678281303; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=FwUyXbFoeylnGL1ofVQkFUgeUX2pI6+3MVKKMokxUts=; b=hXXdb86mw0bOUlrq1+yKtbrFtINYGWSmfcUJvY+nbW50e4IpE3m4EJut2xCDcM0Iee vKJom72IY9+oDHO8wTjLxgU4q7lPu80/8GCsSekO6Q2C9gDnL9V2qs19cltuMRPIzWzD Bj3LD+pxD/t59cITacQbGGFQkcYAoIKLLQzvjMQ392b6GB/u87MJPY7ef77xlx8T6tsh XsxK5xA8kbmN/3LqtT+Bj7P3dytDlna2V2GfBRpCqX6c8euIdjKn2+K3UTGqSqZKIzHe 9FpqvInWOwIJhYXayT8PrSb+04JzYdpgSsUk6wJWCtJR9VhC+rZOZ4/zwm99MmSCG7uQ gQsg== X-Gm-Message-State: AO0yUKXh7cEfhwN5YemdfyP+xRIXTvPtWqUPQPuf6gnL+fzEhKxVzgdy 4Cnvwc8WfTlWCDIeiBtJ4sEBRgUD7ZzFtaCHcw== X-Received: from peternewman-vh.c.googlers.com ([fda3:e722:ac3:cc00:28:9cb1:c0a8:30cc]) (user=peternewman job=sendgmr) by 2002:a5d:4403:0:b0:2c6:ed0b:614e with SMTP id z3-20020a5d4403000000b002c6ed0b614emr3995656wrq.2.1678281303617; Wed, 08 Mar 2023 05:15:03 -0800 (PST) Date: Wed, 8 Mar 2023 14:14:49 +0100 Mime-Version: 1.0 X-Mailer: git-send-email 2.40.0.rc0.216.gc4246ad0f0-goog Message-ID: <20230308131452.383914-1-peternewman@google.com> Subject: [PATCH v4 0/3] Subject: x86/resctrl: Implement rename to help move containers' tasks From: Peter Newman To: reinette.chatre@intel.com, fenghua.yu@intel.com Cc: Babu.Moger@amd.com, bp@alien8.de, dave.hansen@linux.intel.com, eranian@google.com, gupasani@google.com, hpa@zytor.com, james.morse@arm.com, linux-kernel@vger.kernel.org, mingo@redhat.com, skodak@google.com, tglx@linutronix.de, tony.luck@intel.com, x86@kernel.org, Peter Newman X-Spam-Status: No, score=-9.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759806439369575531?= X-GMAIL-MSGID: =?utf-8?q?1759806439369575531?= Hi Reinette, Fenghua, This patch series implements the solution Reinette suggested in the earlier RFD thread[1] for the problem of moving a container's tasks to a different control group on systems that don't provide enough CLOSIDs to give every container its own control group. This patch series assumes that a MON group's CLOSID can simply be changed to that of a new parent CTRL_MON group. This is allowed on Intel and AMD, but not MPAM implementations. While we (Google) only foresee needing this functionality on Intel and AMD systems, this series should hopefully be a good starting point for supporting MPAM. Thanks! -Peter Updates: v4: - rebase to v6.2 - commit message updates suggested by Reinette - replace rdt_move_one_task() patch with rdt_move_group_tasks() filter function patch - prevent rename on files or renaming to "mon_groups" - optimize simple rename case - disallow renaming groups with non-empty cpumask - ensure source is a proper MON group directory - fix missing rdtgrp->closid update - add more last_command_status output v3: use revised task CLOSID/RMID update IPI sync method from [3] v2: reworded change logs based on what I've learned from review comments in another patch series[2] [v1] https://lore.kernel.org/lkml/20221115154515.952783-1-peternewman@google.com/ [v2] https://lore.kernel.org/lkml/20221129120149.1035444-1-peternewman@google.com/ [v3] https://lore.kernel.org/lkml/20230125101334.1069060-1-peternewman@google.com/ [1] https://lore.kernel.org/lkml/7b09fb62-e61a-65b9-a71e-ab725f527ded@intel.com/ [2] https://lore.kernel.org/lkml/54e50a9b-268f-2020-f54c-d38312489e2f@intel.com/ [3] https://lore.kernel.org/lkml/20221220161123.432120-1-peternewman@google.com/ Peter Newman (3): x86/resctrl: Factor rdtgroup lock for multi-file ops x86/resctrl: Parameterize rdt_move_group_tasks() task matching x86/resctrl: Implement rename op for mon groups arch/x86/kernel/cpu/resctrl/rdtgroup.c | 196 ++++++++++++++++++++++--- 1 file changed, 174 insertions(+), 22 deletions(-) base-commit: c9c3395d5e3dcc6daee66c6908354d47bf98cb0c