From 3244bf59816096377edee6f8937f16838dc1a709 Mon Sep 17 00:00:00 2001

From: Hannes Reinecke <hare@suse.de>

Date: Thu, 11 Dec 2014 15:46:06 +0100

Subject: [PATCH] Do not call 'lvm' for non-LVM device-mapper devices

If a device-mapper device is not created by LVM it's pointless

to call any 'lvm' programs got extract details; they'll be

failing anyway. So check the UUID before calling 'lvm'.

This speeds up initrd creation and avoids I/O errors on

multipath devices.

Signed-off-by: Hannes Reinecke <hare@suse.de>

Signed-off-by: Thomas Renninger <trenn@suse.de>

---

 dracut-functions.sh | 4 +++-

 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dracut-functions.sh b/dracut-functions.sh

index 17a71f0..edd8ea9 100755

--- a/dracut-functions.sh

+++ b/dracut-functions.sh

@@ -698,10 +698,12 @@ for_each_host_dev_and_slaves()

 # but you cannot create the logical volume without the volume group.

 # And the volume group might be bigger than the devices the LV needs.

 check_vol_slaves() {

-    local _lv _vg _pv

+    local _lv _vg _pv _dm

     for i in /dev/mapper/*; do

         [[ $i == /dev/mapper/control ]] && continue

         _lv=$(get_maj_min $i)

+        _dm=/sys/dev/block/$_lv/dm

+        [[ -f $_dm/uuid  && $(<$_dm/uuid) =~ LVM-* ]] || continue

         if [[ $_lv = $2 ]]; then

             _vg=$(lvm lvs --noheadings -o vg_name $i 2>/dev/null)

             # strip space