linux-kernel - Re: Running ttm_device_test leads to list_add corruption. prev->next should be next (ffffffffc05cd428), but was 6b6b6b6b6b6b6b6b. (prev=ffffa0b1a5c034f0) (kernel 6.7.5)

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Date: Wed, 21 Feb 2024 10:09:23 -0500
From: Alex Deucher <alexdeucher@...il.com>
To: Christian König <christian.koenig@....com>
Cc: Erhard Furtner <erhard_f@...lbox.org>, Bagas Sanjaya <bagasdotme@...il.com>, 
	Linux DRI Development <dri-devel@...ts.freedesktop.org>, Huang Rui <ray.huang@....com>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
	Karolina Stolarek <karolina.stolarek@...el.com>, 
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, Andrew Morton <akpm@...ux-foundation.org>, 
	Zi Yan <ziy@...dia.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, 
	Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: Running ttm_device_test leads to list_add corruption. prev->next
 should be next (ffffffffc05cd428), but was 6b6b6b6b6b6b6b6b.
 (prev=ffffa0b1a5c034f0) (kernel 6.7.5)

On Wed, Feb 21, 2024 at 9:13 AM Christian König
<christian.koenig@....com> wrote:
>
> Am 20.02.24 um 18:43 schrieb Erhard Furtner:
> > On Tue, 20 Feb 2024 14:50:04 +0100
> > Christian König <christian.koenig@....com> wrote:
> >
> >> Yeah and that's probably the problem. The test is not supposed to be
> >> compiled and executed on bare metal, but rather just as unit test
> >> through user mode Linux.
> >>
> >> We probably don't check that correctly in the kconfig for some reason.
> >> Can you provide your .config file?
> >>
> > Here's my v6.8-rc5 .config attached.
>
> Thanks for that.
>
> As long as nobody comes up with an approach how to run the test even
> when other drivers want to interact with TTM the attached patch is my
> best idea.
>
> It basically disabled compiling the TTM tests as long as neither
> compiling for UML or COMPILE_TEST are set.
>
> Opinions?

Makes sense to me.

Acked-by: Alex Deucher <alexander.deucher@....com>

>
> Thanks,
> Christian.
>
> >
> > Regards,
> > Erhard