linux-kernel - Re: drm/mgag200: doesn't work in panic context

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Message-ID: <20150627141237.GE26543@pd.tnic>
Date:	Sat, 27 Jun 2015 16:12:37 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Daniel Vetter <daniel.vetter@...ll.ch>
Cc:	"Luck, Tony" <tony.luck@...el.com>,
	"Wang, Rui Y" <rui.y.wang@...el.com>,
	Dave Airlie <airlied@...hat.com>,
	"Clark, Rob" <robdclark@...il.com>,
	"Roper, Matthew D" <matthew.d.roper@...el.com>,
	"Chen, Gong" <gong.chen@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: drm/mgag200: doesn't work in panic context

On Sat, Jun 27, 2015 at 03:52:56PM +0200, Daniel Vetter wrote:
> Hm, what do you mean by fixing this in the allocator? I've made some
> rough sketch of the problem space in
> http://www.x.org/wiki/DRMJanitors/ under "Make panic handling work".
> Problem is that the folks which know what to do (drm hackers) have
> zero incentive to fix it (since if you blow up a drm driver any kind
> of fbcon panic handling is hopeless anyway).

Ok, silly question: switching the GPU output to the simplest,
supported-by-all-GPUs mode before panicking is not that easy too, right?

Or does that mean, one needs to reinit GPU in order to even show
something...

Thanks.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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