linux-kernel - Re: [i915] BUG: Bad page state in process Xorg

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Message-Id: <E1Vkw2k-00015V-Ao@www17.your-server.de>
Date:	Mon, 25 Nov 2013 14:17:28 +0100
From:	thomas@...3r.de
To:	daniel@...ll.ch, robdclark@...il.com
Cc:	DRI mailing list <dri-devel@...ts.freedesktop.org>,
	Dave Airlie <airlied@...ux.ie>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [i915] BUG: Bad page state in process Xorg

Hi,

It turns out that this seems to be a bug in udl DRM driver.

I bisected the problem to this patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/udl?id=5dc9e1e87229cb786a5bb58ddd0d60fee6eb4641

With kind regards
Thomas

Am 22.11.2013 17:18 schrieb Daniel Vetter <daniel@...ll.ch>:
>
> On Fri, Nov 22, 2013 at 4:54 PM, Thomas Meyer <thomas@...3r.de> wrote: 
> >> Am 22.11.2013 um 11:55 schrieb Daniel Vetter <daniel@...ll.ch>: 
> >> 
> >> On Fri, Nov 22, 2013 at 11:36 AM, Dave Airlie <airlied@...ux.ie> wrote: 
> >>>> Hi, 
> >>> 
> >>> cc'ing mailing list, 
> >>> 
> >>> Daniel any ideas? 
> >> 
> >> Nope, not really :( And no ideas how to triage this further - if it 
> >> takes 9 days to hit it eventually we'll have a real hard time. Or does 
> >> this happen even after just a short X run? 
> > 
> > Seems to happen every time while stopping the x server. Also after a short run time. 
> > 
> > The current fedora 3.11 kernel doesn't show this bug. I'm using fedora 19, with a self compiled kernel. 
> > 
> > I did turn on config-debug-pagealloc but this didn't show any wrongness. 
>
> In that case I think the bisect is the fastest way to insight - atm 
> I'm really at loss what could be wrong here. 
> -Daniel 
> -- 
> Daniel Vetter 
> Software Engineer, Intel Corporation 
> +41 (0) 79 365 57 48 - http://blog.ffwll.ch