From: Richard Weinberger <richard@nod.at>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: "henning.schild@siemens.com" <henning.schild@siemens.com>,
Lange Norbert <norbert.lange@andritz.com>,
"Xenomai (xenomai@xenomai.org)" <xenomai@xenomai.org>
Subject: Re: x86_64 kernel does not start under qemu
Date: Fri, 08 Mar 2019 12:19:46 +0100 [thread overview]
Message-ID: <2063425.dnF2CDgauY@blindfold> (raw)
In-Reply-To: <77bd8c5c-9961-35f0-e2fd-4c6df8a78a14@siemens.com>
Am Mittwoch, 6. März 2019, 17:39:38 CET schrieb Jan Kiszka:
> On 06.03.19 16:33, Richard Weinberger wrote:
> > Am Mittwoch, 6. März 2019, 14:43:55 CET schrieb Jan Kiszka:
> >> On 06.03.19 14:10, Jan Kiszka wrote:
> >>> On 06.03.19 12:28, Lange Norbert via Xenomai wrote:
> >>>> Hello,
> >>>>
> >>>> I have a similar issue on real hardware (cc Philippe). Can you try booting
> >>>> with notscdeadline?
> >>>>
> >>>
> >>> I would be surprised if it's that: QEMU does not emulate this APIC feature, only
> >>> KVM does.
> >>>
> >>> I need to reproduce. Which QEMU version?
> >>>
> >>
> >> Just booted current ipipe-x86-4.14.y (4.14.103) in QEMU 3.1+ (some development
> >> snapshot) with -smp 4 - works fine. But these are likely quite a few variations
> >> from your setup.
> >
> > I'm on qemu 2.11.2.
>
> That one might still be serializing SMP, thus only use one core on the host.
Well, why is this a problem for Xenomai?
Does it deadlock if you have more than one cpu and these are not truly parallel?
This seems a little odd to me.
> Currently trying to emulate that as it changes timing.
Just retried with latest qemu (v3.1.0-2421-g9b748c5e061b), same problem.
> > Is this plain ipipe? Just figured that you need to prepare the kernel
> > with Xenomai to trigger the problem.
> > Xenomai is 3.0.8.
>
> I have Xenomai stable/v3.0.x running as well.
What kernel config are you using and what is your qemu command line?
Thanks,
//richard
next prev parent reply other threads:[~2019-03-08 11:19 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-06 10:17 x86_64 kernel does not start under qemu Richard Weinberger
2019-03-06 11:28 ` Lange Norbert
2019-03-06 13:10 ` Jan Kiszka
2019-03-06 13:43 ` Jan Kiszka
2019-03-06 14:00 ` Philippe Gerum
2019-03-06 15:33 ` Richard Weinberger
2019-03-06 16:39 ` Jan Kiszka
2019-03-08 11:19 ` Richard Weinberger [this message]
2019-03-08 11:28 ` Jan Kiszka
2019-03-21 11:02 ` Jan Kiszka
2019-03-21 11:57 ` Richard Weinberger
2019-03-21 16:07 ` Jan Kiszka
2019-03-22 20:50 ` Jan Kiszka
2019-03-23 10:04 ` Philippe Gerum
2019-03-23 10:16 ` Philippe Gerum
2019-03-23 16:58 ` Philippe Gerum
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