[Bug 60758] module scsi_wait_scan not found kernel panic on boot

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https://bugzilla.kernel.org/show_bug.cgi?id=60758

Thorsten Kohfeldt <thorsten.kohfeldt@xxxxxx> changed:

           What    |Removed                     |Added
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                 CC|                            |thorsten.kohfeldt@xxxxxx

--- Comment #57 from Thorsten Kohfeldt <thorsten.kohfeldt@xxxxxx> ---
I have filed a bug against dracut:

https://bugzilla.redhat.com/show_bug.cgi?id=1067669

which gives an explanation at least for kernel 3.13.


That kernel version introduces multi queue block i/o for virtio_blk, which in
turn does not any more call blk_init_queue() but blk_mq_init_queue() instead.

Dracut matches against symbol blk_init_queue but not yet against symbol
blk_mq_init_queue.

This should be fixed for Fedora and also for all RHEL derivatives ...


In the mean time there is this WORKAROUND:

1) check if virtio_blk is in intrd:
# for i in /boot/initramfs-* ; do echo $i: ; lsinitrd $i | grep virt ; done

2) if virtio_blk is missing in the relevant initrd, then

# echo 'add_drivers+="virtio_blk"'
>/etc/dracut.conf.d/force-vitio_blk-to-ensure-boot.conf
   (NOTE that the .conf extension is mandatory !)

3) then rebuild the initrd

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