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

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Message-ID: <08aa64d8e07b8b7d4509a0b3233d0c46ce7609c0.camel@gmx.de>
Date:   Sat, 24 Oct 2020 07:25:16 +0200
From:   Mike Galbraith <efault@....de>
To:     Hillf Danton <hdanton@...a.com>
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        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 Sat, 2020-10-24 at 13:00 +0800, Hillf Danton wrote:
> On Sat, 24 Oct 2020 05:38:23 +0200 Mike Galbraith wrote:
> > On Sat, 2020-10-24 at 10:22 +0800, Hillf Danton wrote:
> > >
> > > Looks like we can break the lock chain by moving ttm bo's release
> > > method out of mmap_lock, see diff below.
> >
> > Ah, the perfect compliment to morning java, a patchlet to wedge in and
> > see what happens.
> >
> > wedge/build/boot <schlurp... ahhh>
> >
> > Mmm, box says no banana... a lot.
>
> Hmm...curious how that word went into your mind. And when?

There's a colloquial expression "close, but no cigar", and a variant
"close, but no banana".  The intended communication being "not quite".

	-Mike