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From: "Moore, Robert" <robert.moore@intel.com>
To: "Rafael J. Wysocki" <rafael@kernel.org>,
	Jan Engelhardt <jengelh@inai.de>,
	"Kaneda, Erik" <erik.kaneda@intel.com>
Cc: ACPI Devel Maling List <linux-acpi@vger.kernel.org>
Subject: RE: Linux hangs at ACPI init on Medion P15648 MD63490
Date: Tue, 25 Feb 2020 15:09:01 +0000	[thread overview]
Message-ID: <94F2FBAB4432B54E8AACC7DFDE6C92E3B96EA886@ORSMSX110.amr.corp.intel.com> (raw)
In-Reply-To: <CAJZ5v0g+xnQb7t_d5dqMaPUDhSXiGVNri+kc75Tj5fjCgith3A@mail.gmail.com>



-----Original Message-----
From: Rafael J. Wysocki <rafael@kernel.org> 
Sent: Monday, February 17, 2020 12:24 PM
To: Jan Engelhardt <jengelh@inai.de>; Kaneda, Erik <erik.kaneda@intel.com>; Moore, Robert <robert.moore@intel.com>
Cc: Rafael J. Wysocki <rafael@kernel.org>; ACPI Devel Maling List <linux-acpi@vger.kernel.org>
Subject: Re: Linux hangs at ACPI init on Medion P15648 MD63490

On Mon, Feb 17, 2020 at 1:10 AM Jan Engelhardt <jengelh@inai.de> wrote:
>
>
> On Sunday 2020-02-16 21:49, Rafael J. Wysocki wrote:
>
> >> I thus went back to 5.6-rc and enabled full ACPI tracing
> >> (layer=0xffffffff/level=0xffffffff) starting from
> >>
> >> nsinit.c:213    /* Walk namespace to execute all _INIs on present devices */
> >>
> >> onwards. That log output is at http://inai.de/files/m923.mp4 [53MB].
> >
> >If that is the case, then AFAICS the issue may not be directly 
> >related to the EC at all.  This output only means that the system has 
> >an ECDT, but that should not be a problem by itself.
> >
> >The system appears to hang somewhere in acpi_ns_initialize_devices() 
> >and it is hard to say where exactly.
>
> I had an exact stack trace. (Stashed in all those videos - now 
> extracted and posted to the bug)
>
> >I would suggest creating a BZ entry at bugzilla.kernel.org for this 
> >issue and attaching the output of acpidump from the affected system 
> >in there.
>
> https://bugzilla.kernel.org/show_bug.cgi?id=206553

Erik, Bob, can you please have a look at this BZ?  It looks like there is a deadlock on the global lock while processing some AML during
acpi_ns_initialize_devices() execution.

Yes, we are looking at this.
Bob


      reply	other threads:[~2020-02-25 15:09 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-14 19:28 Linux hangs at ACPI init on Medion P15648 MD63490 Jan Engelhardt
2020-02-16  0:32 ` Rafael J. Wysocki
2020-02-16 14:15   ` Jan Engelhardt
2020-02-16 20:49     ` Rafael J. Wysocki
2020-02-17  0:10       ` Jan Engelhardt
2020-02-17 20:23         ` Rafael J. Wysocki
2020-02-25 15:09           ` Moore, Robert [this message]

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