180 seconds boot delay with fakeraid

[Tormod Volden]

After today'supdates, I have a ca 180s delay at boot, after the message "Waiting for root file system".

This is most likely the 1800 x 0.1 s "slumbering" in /usr/share/initramfs-tools/scripts/init-premount/udev.
My root device is not existing before the "dmraid" command has been run to set up the virtual (fake)raid device. This is currently done in scripts/local-top/dmraid (see bug #22107.

I also tried to copy dmraid to init-premount/ but I guess at this point the underlying /dev/sd* are not available and dmraid can't work.

Should this be covered by "intelligent devices"? This is mentioned in the udev script comments (0x0e) but the udevplug command does not look for it (class=0x0[69ac]*). Should this be class=0x0[69ace]* ?

[Tormod Volden (tormodvolden)]

This was fixed in udev 079-0ubuntu21. Thanks!

The mismatch between the comment and the udevplug command about intelligent devices is still there though.

[Tormod Volden (tormodvolden)]

initramfs-tool 0.40ubuntu28 and udev 079-0ubuntu22 broke this again.

Even worse, now it's not only the delay that is back, but it fails and gives me a busybox shell. If I type dmraid -ay and ctrl-D it continues booting. See attached initramfs.debug

BTW, is the initramfs.debug file available somewhere after the complete boot?

[Tormod Volden (tormodvolden)]

Should my dmraid script be in another place than local-top? BTW, now it's both in local-top and in init-premount, that's why it shows up twice in the debug output.

[Scott James Remnant (Canonical) (canonical-scott)]

Is the dmraid script your own, or does it come from a package?

If it's your own, it will need to be placed in local-top and PREREQ on udev.

[Tormod Volden (tormodvolden)]

The prereq on udev did not fix it.

It is so far only my own script, but I would like to get it into the dmraid package, and then into the installer initrd (bug #22107).

[Scott James Remnant (Canonical) (canonical-scott)]

Ok, boot with break=mount then run:

# scripts/local-top/udev
# scripts/local-top/dmraid

# . scripts/local
# mountroot

And see how long that takes to run.

[Tormod Volden (tormodvolden)]

I am sorry, contrary to what I said, the PREREQ did resolve the issue. For some reason dpkg-reconfigure linux-image-2.6.15-19-386 did not call update-grub as it used to, and I kept booting the previous kernel/initrd without noticing.