linux-kernel - Re: [git pull] drm for 6.10-rc1

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Date: Thu, 16 May 2024 09:50:09 +1000
From: Dave Airlie <airlied@...il.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>, 
	"Deucher, Alexander" <Alexander.Deucher@....com>
Cc: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@....com>, 
	Christian König <christian.koenig@....com>, 
	Matthew Auld <matthew.auld@...el.com>, Daniel Vetter <daniel.vetter@...ll.ch>, 
	dri-devel <dri-devel@...ts.freedesktop.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [git pull] drm for 6.10-rc1

On Thu, 16 May 2024 at 06:29, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> On Wed, 15 May 2024 at 13:24, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> >
> > I have to revert both
> >
> >   a68c7eaa7a8f ("drm/amdgpu: Enable clear page functionality")
> >   e362b7c8f8c7 ("drm/amdgpu: Modify the contiguous flags behaviour")
> >
> > to make things build cleanly. Next step: see if it boots and fixes the
> > problem for me.
>
> Well, perhaps not surprisingly, the WARN_ON() no longer triggers with
> this, and everything looks fine.
>
> Let's see if the machine ends up being stable now. It took several
> hours for the "scary messages" state to turn into the "hung machine"
> state, so they *could* have been independent issues, but it seems a
> bit unlikely.

I think that should be fine to do for now.

I think it is also fine to do like I've attached, but I'm not sure if
I'd take that chance.

Two questions for Arunpravin (and Alex):

Is this fix correct, and can we get a good explanation of it?

Where did this error sneak in? Is the problem in the amdgpu tree, or
was it a drm-next only problem? If so perhaps we need to discuss
moving amdgpu more into drm-tip to catch this sort of problem.

Dave.

View attachment "0001-drm-buddy-convert-WARN_ON-to-an-if-continue.patch" of type "text/x-patch" (1102 bytes)