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 X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33761C56201 for ; Wed, 18 Nov 2020 18:01:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D612124698 for ; Wed, 18 Nov 2020 18:01:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726570AbgKRSBl (ORCPT ); Wed, 18 Nov 2020 13:01:41 -0500 Received: from foss.arm.com ([217.140.110.172]:32862 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725970AbgKRSBk (ORCPT ); Wed, 18 Nov 2020 13:01:40 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1310811D4; Wed, 18 Nov 2020 10:01:40 -0800 (PST) Received: from e113632-lin.cambridge.arm.com (e113632-lin.cambridge.arm.com [10.1.194.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id AEC563F718; Wed, 18 Nov 2020 10:01:38 -0800 (PST) From: Valentin Schneider To: linux-kernel@vger.kernel.org, x86@kernel.org Cc: Fenghua Yu , Reinette Chatre , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , James Morse Subject: [PATCH 0/2] x86/intel_rdt: task_work vs task_struct rmid/closid write race Date: Wed, 18 Nov 2020 18:00:28 +0000 Message-Id: <20201118180030.22764-1-valentin.schneider@arm.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi folks, This is a small cleanup + a fix for a race I stumbled upon while staring at resctrl stuff. Briefly tested on a Xeon Gold 5120 (m2.xlarge.x86 on Equinix) by bouncing a few tasks around control groups. Cheers, Valentin Valentin Schneider (2): x86/intel_rdt: Check monitor group vs control group membership earlier x86/intel_rdt: Plug task_work vs task_struct {rmid,closid} update race arch/x86/include/asm/resctrl.h | 11 ++-- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 71 ++++++++++++++++---------- 2 files changed, 50 insertions(+), 32 deletions(-) -- 2.27.0