Re: [CentOS-virt] adding xen support to grub2 got segfault running grub2-mkimage

[Mark Pryor]

http://107.185.144.55/xen/cent7/grub2/
I have properly packaged a split off of xen support in grub2 for Centos 7.
No more segfaults.
I have not seen anyone attempt to package this starting with the official C7 
SRPM from the vaults.
 


 On Sunday, September 13, 2015 10:50 PM, Mark Pryor  
wrote:
   

 There is some interest lately in making a self-contained grub2 boot image - 
call it pvgrub2, used for booting paravirtual domU in xen where a grub2 config 
is installed.
First attempt--
I first tried using the grub2*.src.rpm from the C7 vault.
I configured as shown 
belowhttps://blog.xenproject.org/2015/01/07/using-grub-2-as-a-bootloader-for-xen-pv-guests/
for headers, I used xen-devel, xen-libs, xen-licenses from a recent build I 
didhttp://107.185.144.55/xen/cent7/dom0/RPMS/stable-4.5/mock/
this gave a segfault from grub2-mkimage with a cmdline 
like/usr/bin/grub2-mkimage  -O x86_64-xen   -C auto  -d 
/usr/lib/grub/x86_64-xen -c ./grub-bootstrap.cfg -m ./memdisk.tar -o 
./grub2-x86_64-xen.bin -v  ext2 fat file font fshelp gzio halt hashsum help 
legacycfg linux loadenv loopback part_dvh part_gpt part_msdos part_plan 
part_sun xfs xnu_uuid xnu_uuid_test xzio
the image would finish if I cut down the module list to about 8 or less 
modules. This is not enough for a useful image .

Second AttemptIn the same build env, I started with the git 
clone (see link). Now when running grub-mkimage I included all the modules 
in/usr/lib/grub/x86_64-xen/ and the image formed without error and works as 
expected as a xen bootloader.
The only difference in the two builds is the size of grubX-mkimage: one is 
stripped and the other not. Using the official grub2 C7 packages failed and a 
rogue build from git worked.
regards,PryMar56







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Re: [CentOS-virt] adding xen support to grub2 got segfault running grub2-mkimage

[George Dunlap]

FYI, your mail provider (yahoo.com) has asked all mail providers to
treat any mail that doesn't come directly from their servers as spam
-- this includes mail from mailing lists.

As a result a large number of people will never see mail sent to any
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You might consider either complaining to your mail provider to get
them to change their policy, or switching mail providers when sending
to mailing lists.

 -George

On Mon, Sep 14, 2015 at 6:49 AM, Mark Pryor  wrote:
> There is some interest lately in making a self-contained grub2 boot image -
> call it pvgrub2, used for booting paravirtual domU in xen where a grub2
> config is installed.
>
> First attempt
> --
> I first tried using the grub2*.src.rpm from the C7 vault.
>
> I configured as shown below
> https://blog.xenproject.org/2015/01/07/using-grub-2-as-a-bootloader-for-xen-pv-guests/
>
> for headers, I used xen-devel, xen-libs, xen-licenses from a recent build I
> did
> http://107.185.144.55/xen/cent7/dom0/RPMS/stable-4.5/mock/
>
> this gave a segfault from grub2-mkimage with a cmdline like
> /usr/bin/grub2-mkimage  -O x86_64-xen   -C auto  -d /usr/lib/grub/x86_64-xen
> -c ./grub-bootstrap.cfg -m ./memdisk.tar -o ./grub2-x86_64-xen.bin
> -v  ext2 fat file font fshelp gzio halt hashsum help legacycfg linux loadenv
> loopback part_dvh part_gpt part_msdos part_plan part_sun xfs xnu_uuid
> xnu_uuid_test xzio
>
> the image would finish if I cut down the module list to about 8 or less
> modules. This is not enough for a useful image .
>
> Second Attempt
> 
> In the same build env, I started with the git clone (see link). Now when
> running grub-mkimage I included all the modules in
> /usr/lib/grub/x86_64-xen/ and the image formed without error and works as
> expected as a xen bootloader.
>
> The only difference in the two builds is the size of grubX-mkimage: one is
> stripped and the other not.
>  Using the official grub2 C7 packages failed and a rogue build from git
> worked.
>
> regards,
> PryMar56
>
>
>
>
>
>
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