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From:   Thomas Gleixner <tglx@linutronix.de>
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To:     Paul Menzel <pmenzel@molgen.mpg.de>
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        David Woodhouse <dwmw2@infradead.org>,
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Subject: Re: [patch 00/37] cpu/hotplug, x86: Reworked parallel CPU bringup
In-Reply-To: <8247ce4d-15b7-03b2-0c9b-74f8cd6cad50@molgen.mpg.de>
References: <20230414225551.858160935@linutronix.de>
 <8247ce4d-15b7-03b2-0c9b-74f8cd6cad50@molgen.mpg.de>
Date:   Mon, 17 Apr 2023 16:48:34 +0200
Message-ID: <87wn2a4la5.ffs@tglx>
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Paul!

On Mon, Apr 17 2023 at 13:19, Paul Menzel wrote:
> Am 15.04.23 um 01:44 schrieb Thomas Gleixner:
> [    0.258193] smpboot: CPU0: AMD A6-6400K APU with Radeon(tm) HD=20
> Graphics (family: 0x15, model: 0x13, stepping: 0x1)
> [=E2=80=A6]
> [    0.259329] smp: Bringing up secondary CPUs ...
> [    0.259527] x86: Booting SMP configuration:
> [    0.259528] .... node  #0, CPUs:      #1
> [    0.261007] After schedule_preempt_disabled
> [   10.260990] CPU1 failed to report alive state

Weird. CPU1 fails to come up and report that it has reached the
synchronization point.

Does it work when you add cpuhp.parallel=3Doff on the kernel command line?

Thanks,

        tglx