On 24/08/2015 04:01, Meng Xu wrote: > Hi, > > I'm trying to use a PV guest VM on Xen to help debug Linux. > I was using VirtualBox to help debug Linux kernel by redirecting the > output of the serial port of the VM to a file in the host. I can do it > in VirtualBox. > > [Why do I want to achieve this?] > It is much faster to reboot a VM than rebooting the physical machine. > I don't need another machine to physically connect to the serial port > of the development machine. > I want to use Xen for as many things as possible. ;-) > > I tried to google a tutorial or manual about how to configure it, but > didn't find any. :-( > > In my understanding, I need to do the following things: > 1) I need to add a line (something like "serial=") in the guest's > configuration file to specify the serial port device to the VM; > 2) I need some configuration to redirect the output of the serial > device to a file in domU; > 3) After that, I can configure the kernel command line in the VM to > dump the kernel message via the serial port of the VM. (I know how to > do this step.) > > Did anyone have tried this before and have some configuration I can > refer to? or > Could anyone give me some references that describes how to configure > the above three steps? > > I really appreciate any help or suggestion or comment.
Configure xenconsoled to log guest consoles to file "--log=guest" at which point anything sent to hvc0 will be logged to files in /var/log/xen/guest/console (configurable with "--log-dir=") There is usually XENCONSOLED_ARGS= in a configuration file somewhere in /etc. ~Andrew
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