From mboxrd@z Thu Jan 1 00:00:00 1970 From: Boris Ostrovsky Subject: Possible regression with 3.13 Date: Mon, 18 Nov 2013 11:06:39 -0500 Message-ID: <528A3B0F.7090502@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1ViRJg-0005z4-4y for xen-devel@lists.xenproject.org; Mon, 18 Nov 2013 16:04:48 +0000 List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel Cc: David Vrabel List-Id: xen-devel@lists.xenproject.org We appear to have a regression in 32-bit 3.13 Linux dom0 --- sometimes (often) dom0 gets stuck somewhere in RCU while running an HVM guest (with "INFO: rcu_sched self-detected stall on CPU..." message being the first indication of things not going well). I believe this was brought in by 39cf275 merge. I am trying to bisect this merge but having a bit of tool trouble. While I am doing this, if anyone noticed any issues with 32-bit dom0 recently, please let me know. I see this most often with 4.1 but I think unstable is also affected. -boris