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Re: [Xen-devel] [help] How to install xen with my own kernel on grub2?

Oh yeah I start a domU !
I think the problem is: xend  and /etc/init.d/xend
this two commands seems different.
 if I use /etc/init.d/xencommons start    and /etc/init.d/xend start, no error comes any more. (however, there should be a "nothing to flush" but I don't see it. hmm...maybe there is still something wrong here)

The old way I create a domU is use "xm create". This way still works, but when I try the new xl command: "xl create", it ask me to stop xend first.
We don't need xend anymore in Xen 4.2?


On Mon, Jul 15, 2013 at 3:44 PM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
On Mon, Jul 15, 2013 at 03:31:27PM +0800, Li Yechen wrote:
> >
> > Use '/' to search for "xen" you will get all the config options.
>
> all the options with "xen" is Yes or Module
>
> That's why grub2 script cannot create the correct entry. You need to copy
> > the .config file to /boot and rename it to config-yourKernelVersion.
>

Right. Grub2 needs to grep kernel config to determine whether that
kernel is Xen-capable (which is pure madness IMHO) -- see
/etc/grub.d/20_linux_xen.

> Great, I copy the .config to /boot , run grub2-mkconfig and see the entry
> of my kernel !
> but that bug of  xen.lowlevel.xc.Error still happen.
>

Check if you have
/dev/xen/{privcmd,evtchn,gntdev,xenbus,xenbus_backend,gntalloc}.

My suggestion would be that you have all Xen drivers compiled in, not as
modules.


Wei.

>
> On Sun, Jul 14, 2013 at 2:00 AM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
>
> > On Sun, Jul 14, 2013 at 01:39:33AM +0800, Li Yechen wrote:
> > > >
> > > > Make sure your kernel has all the necessary Xen drivers compiled in or
> > > > loaded
> > > >
> > >
> > > in make menuconfig:
> > >
> > > Processor type and features  ---> Paravirtualized guest support
> > >  [*]   Xen guest support
> > >  [*]   Enable Xen debug and tuning parameters in debugfs
> > >
> > > Device Drivers  --->  Xen driver support
> > >
> > > These two is enough for kernel 3.9.4?
> > > I think kernel version > 3 should auto support Xen.
> > >
> >
> > Use '/' to search for "xen" you will get all the config options.
> >
> > Running as Xen guest != Running as Dom0
> >
> >
> > Wei.
> >
> > >
> > >
> > > On Sun, Jul 14, 2013 at 1:20 AM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
> > >
> > > > On Sun, Jul 14, 2013 at 01:11:12AM +0800, Li Yechen wrote:
> > > > > Yes! I have fixed this and thank you all the same.
> > > > > Now the problems come to xend start:
> > > > >
> > > > > xc: error: Could not obtain handle on privileged command interface
> > (2 =
> > > > No
> > > > > such file or directory): Internal error
> > > > > Traceback (most recent call last):
> > > > >   File "/usr/sbin/xend", line 36, in <module>
> > > > >     from xen.xend.server import SrvDaemon
> > > > >   File
> > "/usr/lib64/python2.7/site-packages/xen/xend/server/SrvDaemon.py",
> > > > > line 26, in <module>
> > > > >     import relocate
> > > > >   File
> > "/usr/lib64/python2.7/site-packages/xen/xend/server/relocate.py",
> > > > > line 28, in <module>
> > > > >     from xen.xend import XendDomain
> > > > >   File "/usr/lib64/python2.7/site-packages/xen/xend/XendDomain.py",
> > line
> > > > > 36, in <module>
> > > > >     from xen.xend import XendOptions, XendCheckpoint, XendDomainInfo
> > > > >   File
> > "/usr/lib64/python2.7/site-packages/xen/xend/XendCheckpoint.py",
> > > > > line 20, in <module>
> > > > >     from xen.xend import balloon, sxp, image
> > > > >   File "/usr/lib64/python2.7/site-packages/xen/xend/image.py", line
> > 46,
> > > > in
> > > > > <module>
> > > > >     xc = xen.lowlevel.xc.xc()
> > > > > xen.lowlevel.xc.Error: (1, 'Internal error', 'xc_interface_open
> > failed:
> > > > No
> > > > > such file or directory')
> > > > >
> > > > > google says that /proc/xen should mount to xenfs, while I see no.
> > > > > I'm still searching the solution :(
> > > > >
> > > >
> > > > Make sure your kernel has all the necessary Xen drivers compiled in or
> > > > loaded.
> > > >
> > > > > why so many errors come out in Fedora?
> > > > > By the way, what kind of OS do you suggest in Xen development?
> > > > > I give up CentOS because it's too hard to find a suitable package
> > when
> > > > > trying to install software. And the gcc version is also too low.
> > > > >
> > > > >
> > > >
> > > > Debian Wheezy works quite well for me. However you might need to
> > compile
> > > > your own Dom0 kernel there seems to be a regression on its default 3.2
> > > > kernel. It might not boot on some hardware.
> > > >
> > > >
> > > > Wei.
> > > >
> > > > >
> > > > > On Sun, Jul 14, 2013 at 12:57 AM, Wei Liu <wei.liu2@xxxxxxxxxx>
> > wrote:
> > > > >
> > > > > > On Sat, Jul 13, 2013 at 09:35:45PM +0800, Li Yechen wrote:
> > > > > > > Hi Meng,
> > > > > > >
> > > > > > > > Grub2 script checks the Xen options of each Linux kernel's
> > > > > > configuration
> > > > > > > > file under /boot. If no such config, it won't create the
> > relative
> > > > > > entry.
> > > > > > > > You can have a look at the 20_linux_xen script under
> > /etc/grub.d/
> > > > to
> > > > > > get
> > > > > > > > more details.
> > > > > > >
> > > > > > >
> > > > > > > Thank you very for your advice!  I does not find the config as
> > you
> > > > said.
> > > > > > > Anyway I write a menuentry manually and now it seems to work.
> > > > > > >
> > > > > > > but then when I try to start xend, an error come out as:
> > > > > > >
> > > > > > >   File "/usr/sbin/xend", line 36, in <module>
> > > > > > >     from xen.xend.server import SrvDaemon
> > > > > > >   File
> > > > "/usr/lib64/python2.7/site-packages/xen/xend/server/SrvDaemon.py",
> > > > > > > line 20, in <module>
> > > > > > >     import xen.lowlevel.xc
> > > > > > > ImportError: libxenctrl.so.4.2: cannot open shared object file:
> > No
> > > > such
> > > > > > > file or directory
> > > > > > >
> > > > > > > I think my steps to install xen is right. Google says that it's
> > > > something
> > > > > > > wrong with lib64.
> > > > > > >
> > > > > > > I never meet this error before in CentOS. Do you have any ideas?
> > > > > > >
> > > > > > >
> > > > > >
> > > > > > You probably need to edit /etc/ld.so.conf and  run 'ldconfig' to
> > tell
> > > > > > the dynamic linker to pick up the newer installed libraries.
> > > > > >
> > > > > >
> > > > > > Wei.
> > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > On Sat, Jul 13, 2013 at 12:02 PM, Meng <xumengpanda@xxxxxxxxx>
> > > > wrote:
> > > > > > >
> > > > > > > > Hi Yechen,
> > > > > > > >
> > > > > > > > Grub2 script checks the Xen options of each Linux kernel's
> > > > > > configuration
> > > > > > > > file under /boot. If no such config, it won't create the
> > relative
> > > > > > entry.
> > > > > > > >
> > > > > > > > You can have a look at the 20_linux_xen script under
> > /etc/grub.d/
> > > > to
> > > > > > get
> > > > > > > > more details.
> > > > > > > >
> > > > > > > > Best,
> > > > > > > >
> > > > > > > > Meng
> > > > > > > >
> > > > > > > > ---
> > > > > > > > Meng Xu
> > > > > > > > Phd Candidate in Computer and Information Science
> > > > > > > > University of Pennsylvania
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --
> > > > > > > Yechen Li
> > > > > > >
> > > > > > > Team of System Virtualization and Cloud Computing
> > > > > > > School of Electronic Engineering  and Computer Science,
> > > > > > > Peking University, China
> > > > > > >
> > > > > > > Nothing is impossible because impossible itself  says: " I'm
> > > > possible "
> > > > > > > lccycc From PKU
> > > > > >
> > > > > > > _______________________________________________
> > > > > > > Xen-devel mailing list
> > > > > > > Xen-devel@xxxxxxxxxxxxx
> > > > > > > http://lists.xen.org/xen-devel
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > > Yechen Li
> > > > >
> > > > > Team of System Virtualization and Cloud Computing
> > > > > School of Electronic Engineering  and Computer Science,
> > > > > Peking University, China
> > > > >
> > > > > Nothing is impossible because impossible itself  says: " I'm
> > possible "
> > > > > lccycc From PKU
> > > >
> > >
> > >
> > >
> > > --
> > > Yechen Li
> > >
> > > Team of System Virtualization and Cloud Computing
> > > School of Electronic Engineering  and Computer Science,
> > > Peking University, China
> > >
> > > Nothing is impossible because impossible itself  says: " I'm possible "
> > > lccycc From PKU
> >
>
>
>
> --
> Yechen Li
>
> Team of System Virtualization and Cloud Computing
> School of Electronic Engineering  and Computer Science,
> Peking University, China
>
> Nothing is impossible because impossible itself  says: " I'm possible "
> lccycc From PKU



--
Yechen Li

Team of System Virtualization and Cloud Computing 
School of Electronic Engineering  and Computer Science, 
Peking University, China

Nothing is impossible because impossible itself  says: " I'm possible "
lccycc From PKU
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