linux-kernel - [PATCH 0/2] x86/intel_rdt: task_work vs task

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Message-Id: <20201118180030.22764-1-valentin.schneider@arm.com>
Date:   Wed, 18 Nov 2020 18:00:28 +0000
From:   Valentin Schneider <valentin.schneider@....com>
To:     linux-kernel@...r.kernel.org, x86@...nel.org
Cc:     Fenghua Yu <fenghua.yu@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, James Morse <James.Morse@....com>
Subject: [PATCH 0/2] x86/intel_rdt: task_work vs task_struct rmid/closid write race

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