linux-kernel - Re: [PATCH v2] cpu: mark cpu_possible_mask as __ro_after

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Message-ID: <7c5dd81f-46ee-43a7-8359-f713a027386d@roeck-us.net>
Date: Wed, 27 Mar 2024 11:36:28 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc: Alexey Dobriyan <adobriyan@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org,
	linuxarm@...wei.com
Subject: Re: [PATCH v2] cpu: mark cpu_possible_mask as __ro_after_init

On Wed, Mar 27, 2024 at 06:10:53PM +0000, Jonathan Cameron wrote:
> On Thu, 22 Feb 2024 14:19:35 +0300
> Alexey Dobriyan <adobriyan@...il.com> wrote:
> 
> > cpu_possible_mask is by definition "cpus which could be hotplugged without
> > reboot". It's a property which is fixed after kernel enumerates hardware
> > configuration.
> > 
> > Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
> 
> Causes a crash in this path (via CPU HP testing on qemu)
> Pretending to be an AMD Genoa, but I doubt that matters.
> 

Can you send me the configuration, qemu command line, and commands
executed ? I'd like to add that to my test setup if possible.

Thanks,
Guenter