Re: [Xen-devel] pvgrub2 is merged

[Fabio Fantoni <fabio.fantoni@xxxxxxx>]

Il 27/11/2013 17:03, Vladimir 'Ï-coder/phcoder' Serbinenko ha scritto:
> On 27.11.2013 16:59, Fabio Fantoni wrote:
> > Il 27/11/2013 12:50, Vladimir 'Ï-coder/phcoder' Serbinenko ha scritto:
> > > On 27.11.2013 12:32, Fabio Fantoni wrote:
> > > > Il 26/11/2013 19:12, Andrey Borzenkov ha scritto:
> > > > > Ð Tue, 26 Nov 2013 18:58:47 +0100
> > > > > Fabio Fantoni <fabio.fantoni@xxxxxxx> ÐÐÑÐÑ:
> > > > >
> > > > > > I have also another question:
> > > > > > Is possible specify multiple path where search the grub.cfg for
> > > > > > support
> > > > > > all mainly distributions and add a custom cfg path support taking it
> > > > > > from arguments?
> > > > > You can do something like
> > > > >
> > > > > if search --set root --file /boot/grub2/grub.cfg ; then
> > > > >      configfile /boot/grub2/grub.cfg
> > > > > elif search --set root --file /boot/grub/grub.cfg ; then
> > > > >      configfile /boot/grub/grub.cfg
> > > > > elif ...
> > > > >      ...
> > > > > fi
> > > > I tried with this:
> > > > cat > boot/grub/grub.cfg <<EOF
> > > > insmod lvm
> > > > insmod ext2
> > > > insmod part_msdos
> > > > insmod part_gpt
> > > > if search --set root --file /boot/grub2/grub.cfg ; then
> > > >     configfile /boot/grub2/grub.cfg
> > > > elif search --set root --file /boot/grub/grub.cfg ; then
> > > >     configfile /boot/grub/grub.cfg
> > > > fi
> > > > EOF
> > > >
> > > > But it's not working and it prints this line indefinitely in loop:
> > > > error: no such device: /boot/grub2/grub.cfg.
> > > That pretty much explains what happened: you don't have any
> > > /boot/grub2/grub.cfg and when looking for /boot/grub/grub.cfg GRUB found
> > > its own memdisk and fell into recursion. I'm not sure what should be the
> > > proper way to solve this recursion.
> > Ok, now I understand with this:
> > cat > boot/grub/grub.cfg <<EOF
> > insmod lvm
> > insmod ext2
> > insmod part_msdos
> > insmod part_gpt
> > search -s root -f /boot/grub/grub.cfg
> > configfile /boot/grub/grub.cfg
> > EOF
> >
> > that has the debian grub.cfg path equal to memdisk's grub, and then it
> > loads the memdisk ones indefinitely.
> >
> > Anyone know how to exclude memdisk from the search please?
Is it possible to specify a different default grub.cfg path (different 
from all other distributions) changing this command:
./grub-mkstandalone --grub-mkimage=./grub-mkimage -o pvgrub2.xen -O 
x86_64-xen -d grub-core/ boot/grub/grub.cfg
Is it hardcoded as /boot/grub/grub.cfg for grub memdisk or can be set?

> > With this:
> > cat > boot/grub/grub.cfg <<EOF
> > insmod lvm
> > insmod ext2
> > insmod part_msdos
> > insmod part_gpt
> > root='(xen/xvda,msdos1)'
> > configfile /boot/grub/grub.cfg
> > EOF
> >
> > it loads correctly the Sid grub.cfg but grub fails to load with any
> > entry I select, that domU stop.
> >
> > xl -vvv create -c /etc/xen/sid.cfg
> > ...
> > Caricamento Linux 3.11-1-amd64...
> > error: not xen image.
> > Caricamento ramdisk iniziale...
> > xc: debug: hypercall buffer: total allocations:237 total releases:237
> > xc: debug: hypercall buffer: current allocations:0 maximum allocations:4
> > xc: debug: hypercall buffer: cache current size:4
> > xc: debug: hypercall buffer: cache hits:226 misses:4 toobig:7
> >
> > Maybe that grub is waiting for a dom0 configuration type (with also
> > xen.gz) but find only kernel and ramdisk? (which is right for a domU)
> No, this message indicates problem parsing domU image. Can you give the
> link to exact image you use?
The standard kernel image installed by debian installer, the package is 
this:
http://packages.debian.org/sid/linux-image-3.11-2-amd64
On domU a previous version is installed but it was working and xen 
dom0/domU modules are included in this kernel image.
> > If you need more tests/informations tell me and I'll post them.
> >
> > Thanks for any reply.
> >
> > > > I also tried with only these lines instead of conditions:
> > > > search -s root -f /boot/grub/grub.cfg
> > > > configfile /boot/grub/grub.cfg
> > > >
> > > > But all I get is the line "Welcome to GRUB!" followed by a white screen
> > > > on xl console.
> > > >
> > > > I don't know what else to try :(
> > > >
> > > > Thanks for any reply.
> > > >
> > > > > If xen provides way to pass arguments to kernel, it sure could be
> > > > > implemented as arguments to grub. Actually someone asked for a way to
> > > > > pass arguments to grub on EFI, so this could share implementation.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel