From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pim van Riezen Subject: Re: pvops domu soft lockup under load (more logs) Date: Fri, 16 Apr 2010 15:25:01 +0200 Message-ID: References: <2F17645D-999B-435C-97EE-508D39B71035@panelsix.com> <4BBF7550.6070807@goop.org> <1C3B7CF5-5772-4D88-9EBF-F7F71BBA710D@openpanel.com> <4BC5FFF6.3090703@goop.org> <5D538568-D29B-40DB-BEE8-240429C97044@panelsix.com> <4BC74B11.7080206@goop.org> <9ED98B64-9FF0-418E-8842-73518F3284B9@panelsix.com> <9D75997F-4855-41A0-B159-18B6A3BFC776@panelsix.com> Mime-Version: 1.0 (Apple Message framework v1078) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <9D75997F-4855-41A0-B159-18B6A3BFC776@panelsix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Pim van Riezen Cc: Jeremy Fitzhardinge , xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On Apr 16, 2010, at 15:19 , Pim van Riezen wrote: >=20 > On Apr 16, 2010, at 9:37 , Pim van Riezen wrote: >=20 >> Another datapoint. This customer has similarly loaded VPS machines on = a number of different hardware nodes. Not all of them had the lockup = problem. I applied the jiffies clocksource to all his machines, = regardless of their current problem status. After a day without lockups, = the customer complained about time drift (ntp was not activated). The = guest that had experienced the soft lockups earlier had major clock = drift and were way ahead: >>=20 >> 16 Apr 09:29:26 ntpdate[11236]: step time server 194.109.22.18 = offset -7337.731686 sec=20 >=20 > 2.6.32.11 fixes the excessive drifting. Sorry I spoke to soon. Investigating. Pi