From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Christopher S. Aker" Subject: Re: Xen 4 serial hangs during boot Date: Fri, 20 Jul 2012 13:48:13 -0400 Message-ID: <500999DD.1010708@theshore.net> References: <4E95EBD6.7010400@theshore.net> <20111013104654.GB44937@ocelot.phlegethon.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20111013104654.GB44937@ocelot.phlegethon.org> 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 List-Id: xen-devel@lists.xenproject.org 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. -Chris