From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: an issue with 'xm save' Date: Fri, 21 Sep 2012 10:34:30 -0400 Message-ID: <20120921143430.GA3522@phenom.dumpdata.com> References: <505C3647.1030003@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <505C3647.1030003@oracle.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Zhenzhong Duan Cc: Dan Magenheimer , Feng Jin , xen-devel List-Id: xen-devel@lists.xenproject.org On Fri, Sep 21, 2012 at 05:41:27PM +0800, Zhenzhong Duan wrote: > Hi maintainers, > > I found there is an issue when 'xm save' a pvm guest. See below: > > When I do save then restore once, CPU(%) in xentop showed around 99%. > When I do that second time, CPU(%) showed 199% > > top in dom0 showed: > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 20946 root 18 -2 10984 1284 964 S 19.8 0.3 0:48.93 block > 4939 root 18 -2 10984 1288 964 S 19.5 0.3 1:34.68 block > > I could kill the block process, then all look normal again. What is the 'block' process? If you attach 'perf' to it do you get an idea of what it is spinning at? > > xen and xen-tools are both generated with xen-unstable. > I tried xl, but it segfault. It segfaulted? When doing 'xl save' or 'xl resume'? Or just allocating the guest? > I also tried ovm3.1.1(xen-4.1.2-18.el5.1 and xen-tools-4.1.2-18.el5.1), > can't reproduce. So the issue is only present with Xen-unstable? Did you clear _any_ older Xen libraries/tools when you installed Xen-unstable? > > Did anybody see similar issue before? Any fix already there? > thanks > zduan >