linux-kernel - Re: [PATCH v1] xen: avoid crash in disable_hotplug

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Message-ID: <20180905135019.56b303da.olaf@aepfle.de>
Date:   Wed, 5 Sep 2018 13:50:19 +0200
From:   Olaf Hering <olaf@...fle.de>
To:     Juergen Gross <jgross@...e.com>
Cc:     xen-devel@...ts.xenproject.org,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1] xen: avoid crash in disable_hotplug_cpu

Am Wed, 5 Sep 2018 12:55:58 +0200
schrieb Juergen Gross <jgross@...e.com>:

> the last cpu

Which one is the "last" one? I mean, if cpu#0 never can be offlined than perhaps the code should check for just that and return early. But if cpu#0 could be disabled while some other cpu is the remaining cpu, some other check is needed I think.

Olaf

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