linux-kernel - Re: [PATCH v4] xen: avoid crash in disable_hotplug

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Message-ID: <6b51f88f-7f40-ded4-0202-e4c31fa606a2@suse.com>
Date:   Tue, 11 Sep 2018 09:55:07 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Olaf Hering <olaf@...fle.de>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc:     xen-devel@...ts.xenproject.org,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4] xen: avoid crash in disable_hotplug_cpu

On 11/09/18 09:52, Olaf Hering wrote:
> Am Fri, 7 Sep 2018 12:56:37 -0400
> schrieb Boris Ostrovsky <boris.ostrovsky@...cle.com>:
> 
>> I was hoping you'd respond to my question about warning.
> 
> It looks like CONFIG_BOOTPARAM_HOTPLUG_CPU0=y is the reason for the warning.
> As Jürgen suggested in another mail, Xen should probably disable hotplugging
> for cpu#0 in the generic setup code. Then cpu_is_hotpluggable(cpu) would
> do the right thing.
> 
> Do you want me to merge that extra change into this patch?

I think an extra patch would be better, as it is a different issue.


Juergen