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Date: Tue, 7 May 2024 05:03:54 -0400
From: Steven Rostedt <rostedt@goodmis.org>
To: David Airlie <airlied@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>, Maxime Ripard
 <mripard@kernel.org>, LKML <linux-kernel@vger.kernel.org>, Alex Constantino
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 Lankhorst <maarten.lankhorst@linux.intel.com>, Thomas Zimmermann
 <tzimmermann@suse.de>, Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [BUG][v6.9-rc6] Deadlock with: Revert "drm/qxl: simplify
 qxl_fence_wait"
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On Tue, 7 May 2024 15:54:21 +1000
David Airlie <airlied@redhat.com> wrote:

> 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.

I agree that it will likely cause the issues that this was addressing
to come back, but you can't have a fix that introduces a deadlock.

Perhaps the deadlock didn't exist before, and the printk updates
changed the way it works to introduce it now?

-- Steve