On Wed, Mar 25, 2015, at 08:51 AM, Jim Fehlig wrote:

lyndat3@your-mail.com wrote:

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I just installed openSUSE 13.2 with Xen & kernel-xen.

I need to set up the /xen.gz ... <OPTIONS> ... in grub.

In grub-legacy that's easy. Just modify the /boot/grub/menu.lst

kernel /xen.gz dom0_mem=1024M,max:1024M dom0_max_vcpus=2 dom0_vcpus_pin=true ...

The system installed grub2 as the default. In grub2 it's not clear to me how to set those options.

Add the options to GRUB_CMDLINE_XEN in /etc/default/grub and recreate /boot/grub2/grub.cfg with 'grub2-mkconfig -o /boot/grub2/grub.cfg'.

Thanks, GRUB_CMDLINE_XEN= takes care of the xen.gz line. If I have multikernel enabled and have both a -xen and -default kernel available, the module /vmlinuz-3.19.2-2.g6c3d33f-xen ... line looks like it's assembled from a combination of GRUB_CMDLINE_LINUX= & GRUB_CMDLINE_LINUX_DEFAULT= I need different options on the Xen instance's /vmlinuz line. For example a different elevator= & clocksource=. If GRUB_CMDLINE_XEN handles the Xen instance's xen.gz line, how do I define the xen-specific /vmlinuz line? LT -- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-virtual+owner@opensuse.org

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On 25.03.15 at 17:24, wrote: lyndat3@your-mail.com wrote: On Wed, Mar 25, 2015, at 08:51 AM, Jim Fehlig wrote:

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lyndat3@your-mail.com wrote:

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I just installed openSUSE 13.2 with Xen & kernel-xen.

I need to set up the /xen.gz ... <OPTIONS> ... in grub.

In grub-legacy that's easy. Just modify the /boot/grub/menu.lst

kernel /xen.gz dom0_mem=1024M,max:1024M dom0_max_vcpus=2 dom0_vcpus_pin=true ...

The system installed grub2 as the default. In grub2 it's not clear to me how to set those options.

Add the options to GRUB_CMDLINE_XEN in /etc/default/grub and recreate /boot/grub2/grub.cfg with 'grub2-mkconfig -o /boot/grub2/grub.cfg'.

Thanks, GRUB_CMDLINE_XEN= takes care of the xen.gz line.

If I have multikernel enabled and have both a -xen and -default kernel available, the

module /vmlinuz-3.19.2-2.g6c3d33f-xen ...

line looks like it's assembled from a combination of

GRUB_CMDLINE_LINUX= & GRUB_CMDLINE_LINUX_DEFAULT=

Right.

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I need different options on the Xen instance's /vmlinuz line. For example a different elevator= & clocksource=.

Hmm, not sure if that is currently possible, but I'm not a grub2 expert. Perhaps others on the list have suggestions. Otherwise might be a feature request for grub2.

Isn't it GRUB_CMDLINE_LINUX_XEN? Jan -- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-virtual+owner@opensuse.org

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On 3/25/2015 at 10:40 AM, wrote:

On Wed, Mar 25, 2015, at 09:35 AM, Jan Beulich wrote:

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Isn't it GRUB_CMDLINE_LINUX_XEN?

At upstream docs, I found these

‘GRUB_CMDLINE_XEN’ ‘GRUB_CMDLINE_XEN_DEFAULT’

The values of these options are appended to the values of ‘GRUB_CMDLINE_LINUX’ and ‘GRUB_CMDLINE_LINUX_DEFAULT’ for Linux and Xen menu entries.

and

‘GRUB_CMDLINE_LINUX_XEN_REPLACE’ ‘GRUB_CMDLINE_LINUX_XEN_REPLACE_DEFAULT’

The values of these options replace the values of ‘GRUB_CMDLINE_LINUX’ and ‘GRUB_CMDLINE_LINUX_DEFAULT’ for Linux and Xen menu entries.

Safe to assume the *_REPLACE will be correctly used by openSUSE xen configs?

These options are used in /etc/grub.d/20_linux_xen. Setting these in /etc/default/grub and running 'grub2-mkconfig -o /boot/grub2/grub.cfg' should give you what you want. - Charles -- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-virtual+owner@opensuse.org

On Wed, Mar 25, 2015, at 09:24 AM, Jim Fehlig wrote:

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I need different options on the Xen instance's /vmlinuz line. For example a different elevator= & clocksource=.

Hmm, not sure if that is currently possible, but I'm not a grub2 expert. Perhaps others on the list have suggestions. Otherwise might be a feature request for grub2.

I'm not either, I'd appreciate hearing from anyone who IS, on this. grub2's far less clean IMO than -legacy, but with support completely refused for -legacy by upstream, it's the way of things now. Just installing -xen & -default kernels alongside of grub2 ends up generating this list of menu & submenu entries: grep "submenu\|^\menuentry" /boot/grub2/grub.cfg | cut -d "'" -f2 openSUSE Advanced options for openSUSE openSUSE GNU/Linux, with Xen hypervisor Advanced options for openSUSE GNU/Linux (with Xen hypervisor) Xen hypervisor, version 4.5.0_03-359 Xen hypervisor, version 4.5 Xen hypervisor, version 4 Xen hypervisor, version dbg Xen hypervisor, version xen Xen hypervisor, version dbg-4.5.0_03-359 Xen hypervisor, version dbg-4.5 Xen hypervisor, version dbg-4 Not sure what to do with all of those yet. On a headless server without some helpful GUI tools making edits is a bit of a mess. While setting up & tuning Xen, snce -xen & -default tuning are necessarily different, this gets to be a pain. I'm hoping I won't have to resort to manual config of grub.cfg. LT -- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-virtual+owner@opensuse.org

grub2 does not allow private settings.

Can you explain that some more? I thought I managed to correctly get the xen-specific override entries working using GRUB_CMDLINE_LINUX_XEN_REPLACE GRUB_CMDLINE_LINUX_XEN_REPLACE_DEFAULT

Create a /boot/grub2/custom.cfg and put all your private stuff there.

In that custom.cfg, refer to /boot/vmlinuz-xen and /boot/initrd-xen instead of the versioned files. Doing it that way will use always the latest installed kernel pkg.

I think the syntax of that file is something like: snip

That's cleaner and more convenient in any case. I'll give that a try. Thanks.

You can as many entries as you want, they will appear in the main grub menu.

Is there a cmd line tool/script that displays the defined & available grub2 menu entries, with their boot-instance numbers that can be used to set the default boot item? LT -- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-virtual+owner@opensuse.org

This is for every kernel. I think you said earlier that you wanted to boot the same kernel with a different set of cmdline options. To actually achieve that a custom.cfg is required.

I had been referring to different options for 1 kernel-default and 1 kernel-xen. For that, it was sufficient. But eventually I will have multiples of each. Your point is taken.

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Is there a cmd line tool/script that displays the defined & available grub2 menu entries, with their boot-instance numbers that can be used to set the default boot item?

I do not know, last time this came up the answer was no. And such tool, to be complete, has to handle also the "source" command.

I know 'grub2' is considered the future -- if only because grub1 is unsupported. I'm not always sure it's 'progress' though. If only on the server-side. LT -- To unsubscribe, e-mail: opensuse-virtual+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-virtual+owner@opensuse.org