From mboxrd@z Thu Jan 1 00:00:00 1970 From: Harry Butterworth Subject: Re: blocking Xen 3.X production use: soft lockup bugs Date: Sat, 05 Aug 2006 15:33:12 +0100 Message-ID: <1154788392.18468.5.camel@localhost.localdomain> References: Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Keir Fraser Cc: Ian Pratt , xen-devel , Steve Traugott List-Id: xen-devel@lists.xenproject.org On Sat, 2006-08-05 at 14:45 +0100, Keir Fraser wrote: > On 5/8/06 12:59 pm, "Harry Butterworth" > wrote: > > > Another data point: Yesterday I was working with an unstable changeset > > from the morning (I think about halfway through the qemu patches) and > > running HVM xm-test to try to debug the create-concurrent failures. > > qemu_dm was taking 100% of one core and I got about 6 soft lockups in > > dom0 and 2 dom0 hangs. > > > > I'm not sure exactly why HVM testing is all over the floor for me, maybe > > I picked a bad changeset or perhaps the recent ubuntu updates have > > broken something. > > > > It's possible that there are still some lurking soft lockup issues > > anyway. > > Well, I believe the issues are sorted out for paravirtualised guests at > least. Maybe there are lurkers for HVM guests -- if so, and they're of the > scale of hangs and softlockups, we'd really like detailed info so we could > try to repro. I'll post the changeset and any more details I can when I get back into work on Monday but dd was segfaulting for me due to a locale issue after the ubuntu update so I don't really have a lot of confidence that it's even a xen problem yet. Harry.