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

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Message-ID: <20201027101810.pk5liej6xmbjcwem@linutronix.de>
Date:   Tue, 27 Oct 2020 11:18:10 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Mike Galbraith <efault@....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 2020-10-27 11:14:34 [+0100], Mike Galbraith wrote:
> 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.

but that is over a year old and should be noticed in v5.4-RT.

> 	-Mike

Sebastian