06.11.2015 19:08, Tim Walberg пишет:
> On some relatively large systems that are used for virtualization,
> often containing upwards of 100 virtual machines, we've started running
> into issues with GRUB not being able to install on a new virtual machine
> (using the typical process of mounting all the VM file systems on the host
> and running grub-install under chroot). We've tracked the issue down to this
> code, which is clearly erroneous - device minor numbers have been more than
> 8 bits for quite some time now - in grub-core/osdep/devmapper/getroot.c:
>
>      char *
>      grub_util_devmapper_part_to_disk (struct stat *st,
>                                    int *is_part, const char *path)
>      {
>        int major, minor;
>
>        if (grub_util_get_dm_node_linear_info (st->st_rdev,
>                                           &major, &minor, 0))
>          {
>            *is_part = 1;
>            return grub_find_device ("/dev",
>                                     (major << 8) | minor);         <<<<< --------- ERROR!
>          }
>        *is_part = 0;
>        return xstrdup (path);
>      }
>
> When we have enough device-mapper devices (including all their partitions)
> on a host that the next newly-added set of devices ends up with minor numbers
> outside the 8-bit range, this code fails, with the result that grub-install
> can't find the devices that it needs to complete the install.
>
> There might be other places in the code where similar assumptions are made.
> Someone more familiar with the code would probably be better for tracking
> those down. But, this one at least needs to be fixed.
>


Does attached patch help?