On 24.06.2011 04:18, Bruce Dubbs wrote: > Vladimir 'φ-coder/phcoder' Serbinenko wrote: >> On 12.06.2011 04:28, Bruce Dubbs wrote: >>> I'm trying to manually run grub-mkconfig to establish grub-1.99 >>> installation instructions for Linux From Scratch. >>> >>> I am getting: >>> >>> grub-mkconfig -o /boot/grub/grub.cfg >>> /usr/sbin/grub-probe: error: cannot stat `/dev/root' >>> >>> Doing some investigating grub-mkconfig is running: >>> /usr/sbin/grub-probe --target=device / >>> >>> Drilling down, grub-probe is doing: >>> device_name = grub_guess_root_device (path); >>> >>> Which in turn is doing: >>> grub_find_root_device_from_mountinfo( "/", NULL ); >>> >>> This is reading /proc/self/mountinfo. The problem here is that this >>> file does not give the device, but specifies /dev/root: >>> >>> 13 1 8:15 / / rw,relatime - ext3 /dev/root >>> rw,errors=continue,barrier=0,data=writeback >>> >>> The kernel is 2.6.39.1, but 2.6.37 seems to give the same thing. >>> grub-probe should be able to detect /dev/sda15, but fails on newer >>> kernels. >>> >>> grub-probe for grub-1.98 works fine. A grep there shows no use of >>> /proc/self/mountinfo. >>> >>> Suggestions? >>> >> update either udev or grub. normally /dev/root should be a symlink. >> Newer grub-probe can cope with some other arrangements as well > > Well I'm using udev-171. That is the most recent version. We don't > like to non-release package versions in LFS, but we do occasionally > patch files. > > I don't know when /dev/root became a 'device'. Udev doesn't create > it. We also don't use an initrd. That's not needed when you know in > advance what your hardware configuration is. > > I did work around the problem by manually creating the symlink. I do > not know of anything other than GRUB that needs it, but I don't use lvm. > > In any case, I don't think GRUB should choke because /dev/root is > missing. > it's fixed now but handling these cases requires to scan /dev to find the matching device based on major/minor pair which is slower, sometimes much slower. > -- Bruce > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > https://lists.gnu.org/mailman/listinfo/grub-devel
-- Regards Vladimir 'φ-coder/phcoder' Serbinenko
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