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

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Message-ID: <2456637d-373a-729a-62fe-8c4799900233@suse.com>
Date:   Tue, 11 Sep 2018 12:51:20 +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 12:48, Olaf Hering wrote:
> Am Tue, 11 Sep 2018 09:52:58 +0200
> schrieb Olaf Hering <olaf@...fle.de>:
> 
>> 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.
> 
> The relevant code is all private to arch/x86/kernel/topology.c.
> There is no way to set .hotpluggable prior to register_cpu.
> I guess you need to work that out with the x86 maintainers.

Okay, I'll do that.


Juergen