From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH 0/3] per_cpu() fixes
Date: Thu, 3 Oct 2013 18:55:25 +0100
Message-ID: <524DAF8D.7050003@citrix.com>
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To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Keir Fraser <keir@xen.org>, Ian Campbell <Ian.Campbell@citrix.com>, Tim Deegan <tim@xen.org>, Ian Jackson <Ian.Jackson@eu.citrix.com>, Xen-devel <xen-devel@lists.xen.org>, Jan Beulich <JBeulich@suse.com>
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On 26/09/13 10:49, Andrew Cooper wrote:
> This patch series is two independent but related changes to the use of
> per_cpu() with offline pcpus.
>
> The first patch is a fix for use of get_cpu_idle_time() whereby toolstack
> hypercalls could cause an effective NULL structure dereference.
>
> The second patch is a forward looking fix to try and prevent similar issues in
> the future.  It causes uses of per_cpu() against an offline pcpu to cause a
> #GF rather than to try and dereference a very low address.
>
> The third patch is debugging code to demonstrate the effects of patch 2.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
> CC: Keir Fraser <keir@xen.org>
> CC: Jan Beulich <JBeulich@suse.com>
> CC: Tim Deegan <tim@xen.org>
> CC: Ian Campbell <Ian.Campbell@citrix.com>
> CC: Ian Jackson <Ian.Jackson@eu.citrix.com>
>

Ping?  Any thoughts at all?

~Andrew