From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keir Fraser Subject: Re: [PATCH 0/3] per_cpu() fixes Date: Thu, 03 Oct 2013 20:52:06 +0100 Message-ID: References: <524DAF8D.7050003@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <524DAF8D.7050003@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Andrew Cooper Cc: Ian Jackson , Tim Deegan , Ian Campbell , Jan Beulich , Xen-devel List-Id: xen-devel@lists.xenproject.org On 03/10/2013 18:55, "Andrew Cooper" wrote: > 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 >> CC: Keir Fraser >> CC: Jan Beulich >> CC: Tim Deegan >> CC: Ian Campbell >> CC: Ian Jackson >> > > Ping? Any thoughts at all? Sensible patches. Acked-by: Keir Fraser > ~Andrew