From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: Xen 4 serial hangs during boot Date: Fri, 20 Jul 2012 18:49:35 +0100 Message-ID: <50099A2F.9030907@citrix.com> References: <4E95EBD6.7010400@theshore.net> <20111013104654.GB44937@ocelot.phlegethon.org> <500999DD.1010708@theshore.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <500999DD.1010708@theshore.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: "Christopher S. Aker" Cc: xen devel List-Id: xen-devel@lists.xenproject.org On 20/07/12 18:48, Christopher S. Aker wrote: > On 10/13/11 6:46 AM, Tim Deegan wrote: >> At 15:34 -0400 on 12 Oct (1318433686), Christopher S. Aker wrote: >>> Since I started playing with Xen 4 (vs 3.x), machines often hang during >>> reboot at exactly the same place: > We're still seeing this occasionally, even with 'cpuinfo' added to Xen > args. Serial console stops responding during Xen booting - every time > in the exact same place: > > (XEN) CPU9: Intel(R) Xeon(R) CPU L5520 @ 2.27GHz stepping 05 > (XEN) CPU 10 > > The machine continues to boot and becomes available via network, however > nothing I do from then on can get serial to start working again. > Control-AAA, sending massive amounts to /dev/console, etc. If I issue > the reboot command via dom0 something will tickle Xen and a page or two > of buffered OLD data will flush out the serial before the machine > reboots, which is interesting. > > In this state hvc_console receives no interrupts. When not in this > state hvc_console seems to get interrupts occasionally. Not sure of its > significance. > > I still have a box in this state if anyone has ideas to try. Is this an HP box by any chance, and are you accessing serial over iLO? ~Andrew > > -Chris > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel -- Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer T: +44 (0)1223 225 900, http://www.citrix.com