linux-kernel - Re: kvm+nouveau induced lockdep gripe

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Message-ID: <7bbfce68bdd01e1d48d3d2c6f9581654e380bf2d.camel@gmx.de>
Date:   Tue, 27 Oct 2020 11:14:34 +0100
From:   Mike Galbraith <efault@....de>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     Hillf Danton <hdanton@...a.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-rt-users <linux-rt-users@...r.kernel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Skeggs <bskeggs@...hat.com>
Subject: Re: kvm+nouveau induced lockdep  gripe

On Tue, 2020-10-27 at 10:00 +0100, Sebastian Andrzej Siewior wrote:
> Let me try if I can figure out when this broke.

My money is on...
710da3c8ea7df (Juri Lelli 2019-07-19 16:00:00 +0200 5317)       if (pi)
710da3c8ea7df (Juri Lelli 2019-07-19 16:00:00 +0200 5318)               cpuset_read_lock();
...having just had an unnoticed consequence for nouveau.

	-Mike