From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: Blank screen while booting xen Date: Mon, 11 Jan 2016 09:53:30 -0500 Message-ID: <20160111145330.GA10641@char.us.oracle.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aIdqn-0007rM-HQ for xen-devel@lists.xenproject.org; Mon, 11 Jan 2016 14:53:41 +0000 Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Harmandeep Kaur Cc: xen-devel@lists.xenproject.org, Dario Faggioli List-Id: xen-devel@lists.xenproject.org On Mon, Jan 11, 2016 at 12:57:27AM +0530, Harmandeep Kaur wrote: > Hi, > > I tried to modify and compile some of Xen 4.7's code > (cloned from git clone git://xenbits.xen.org/xen.git) > and even with a very minor change (patch included at last) > my xen failed to boot. It stucks at black blank screen after > showing some xen logs. What is on your Linux command line? Do you have 'console=hvc0' ? > > By adding "vga=text-80x80,keep" to the grub before booting > xen., infinite loop of text > "(XEN) traps.c:3290: GPF (0000): ffff82d0801af4d5 -> ffff82d080240e5a" > appears. > > I tried to compile and boot xen reverting the change, but > same issue still exists. > > Also I tried to setup serial console but my output is garbled. > More info on it here, > http://lists.xenproject.org/archives/html/xen-devel/2015-12/msg02045.html > > I tried different software (cu, gtkterm), different baud rates, > different serial-USB cable and stopping modemmanager, > but no luck. How did you set the baudrate? I usually do 'screen /dev/ttyUSB0 115200 cs8' ? > > I am using i3-6100 processor, if that info is needed.I will > appreciate any help. dmesg | grep tty and lspci could also help? > > Regards, > Harmandeep Kaur > Outreachy Intern > > -----------------------------------------------PATCH--------------------------------------------- > >From c814c4ac0028bdef0082561ad6cd69570502c3ba Mon Sep 17 00:00:00 2001 > From: Harmandeep Kaur > Date: Tue, 29 Dec 2015 22:23:21 +0530 > Subject: [PATCH] First mod > > Signed-off-by: Harmandeep Kaur > --- > xen/common/sched_credit.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/xen/common/sched_credit.c b/xen/common/sched_credit.c > index 0dce790..b395501 100644 > --- a/xen/common/sched_credit.c > +++ b/xen/common/sched_credit.c > @@ -1148,6 +1148,8 @@ csched_dom_init(const struct scheduler *ops, > struct domain *dom) > { > struct csched_dom *sdom; > > +printk("XXX Hello, this is my first mod :) \n"); > + > if ( is_idle_domain(dom) ) > return 0; > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel