linux-kernel - Re: [BUG][v6.9-rc6] Deadlock with: Revert "drm/qxl: simplify qxl_fence

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Message-ID: <CAMwc25qMXOFOfKsa7BRi3dz125PDyvVtgTty0Q4bkAFftJDLqQ@mail.gmail.com>
Date: Tue, 7 May 2024 15:54:21 +1000
From: David Airlie <airlied@...hat.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Maxime Ripard <mripard@...nel.org>, Steven Rostedt <rostedt@...dmis.org>, 
	LKML <linux-kernel@...r.kernel.org>, 
	Alex Constantino <dreaming.about.electric.sheep@...il.com>, 
	Timo Lindfors <timo.lindfors@....fi>, Gerd Hoffmann <kraxel@...hat.com>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Thomas Zimmermann <tzimmermann@...e.de>, 
	Daniel Vetter <daniel@...ll.ch>
Subject: Re: [BUG][v6.9-rc6] Deadlock with: Revert "drm/qxl: simplify qxl_fence_wait"

On Tue, May 7, 2024 at 6:29 AM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> On Mon, 6 May 2024 at 05:46, Maxime Ripard <mripard@...nel.org> wrote:
> >
> > It looks like qxl is not well maintained. Please send the revert, we'll
> > merge it.
>
> I'll just do the revert and we don't have to do the round-trip
> overhead (since we're already in rc7 and I hope to just do final next
> weekend).

I expec this will reintroduce the other problems that caused this
change in the first place, but I think this should at least bring us
back to regression equilibrium. I can't recommend anyone use qxl hw
over virtio-gpu hw in their VMs, since virtio-gpu is actually hw
designed for virt.

Dave.