From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefano Stabellini <sstabellini@kernel.org>
Subject: Re: Xen on ARM IRQ latency and scheduler overhead
Date: Fri, 17 Feb 2017 15:14:28 -0800 (PST)
Message-ID: <alpine.DEB.2.10.1702171456290.9566@sstabellini-ThinkPad-X260>
References: <alpine.DEB.2.10.1702091603240.20549@sstabellini-ThinkPad-X260>
 <1486716022.3042.112.camel@citrix.com>
 <alpine.DEB.2.10.1702101005000.20549@sstabellini-ThinkPad-X260>
 <1487247614.6732.45.camel@citrix.com>
 <alpine.DEB.2.10.1702161147010.9566@sstabellini-ThinkPad-X260>
 <alpine.DEB.2.10.1702161439490.9566@sstabellini-ThinkPad-X260>
 <1487329361.6732.76.camel@citrix.com>
 <3672df49-6353-5d03-ab0b-1143ffdf0822@arm.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <3672df49-6353-5d03-ab0b-1143ffdf0822@arm.com>
List-Unsubscribe: <https://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <https://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Errors-To: xen-devel-bounces@lists.xen.org
Sender: "Xen-devel" <xen-devel-bounces@lists.xen.org>
To: Julien Grall <julien.grall@arm.com>
Cc: edgar.iglesias@xilinx.com, Stefano Stabellini <sstabellini@kernel.org>, george.dunlap@eu.citrix.com, Dario Faggioli <dario.faggioli@citrix.com>, xen-devel@lists.xen.org, nd@arm.com
List-Id: xen-devel@lists.xenproject.org
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