Bug#633024: initramfs-tools: Race condition when root filesystem is on a LV and mdadm array
On Fri, 08 Jul 2011, Roel Brook wrote:
> When booting the system, it seems there is a race condition between assembling
> a mdadm array, and scanning and / or activating VGs which have it's PV on this
> array.
>
> I have a mdadm array (ICH9R fakeraid BIOS array), where one of the partitions
> is a PV. On this PV, there is a LV for the root filesystem.
>
> Since ~ 2.6.37, the initramfs does not find the VG all the time. This means, I
> have to boot the system a couple of times, before the VG is found, and the root
> filesystem is mounted.
>
> There is no real logic in how often initramfs succesfully finds the VG. It's
> about a 1 in 3 chance of it booting succesfull. However, sometimes I have to
> reboot the system about 10 times before the VG is finally found. Sometimes it
> finds it immediatly.
>
> When in the shell for the initramfs, the RAID array seems to be assembled fine
> (this is also reported in the console output). Also, when executing a "lvm
> vgdisplay", the VG is there. Once the VG is activated, the LV's can be mounted
> fine.
>
> Attached are the dmesg output, the contents of /proc/mdstat and the output of
> "lvm vgdisplay" after running a "lvm vgchange -ay"
tried to use rootdelay=X with a small value?
see http://wiki.debian.org/InitramfsDebug
--
maks
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