Re: [linux-lvm] Internal error: Referenced LV pvmove0 not listed in VG

[David Teigland <teigland@redhat.com>]

On Wed, Apr 24, 2019 at 08:10:11PM +0300, Anssi Hannula wrote:
> Anssi Hannula kirjoitti 2019-04-24 02:06:
> > Hi all,
> > 
> > I'm getting the following error when trying to run a pvmove command:
> > 
> > # pvmove -v /dev/md0:18122768-19076597
> >     Cluster mirror log daemon not included in build.
> >     Archiving volume group "delta" metadata (seqno 72).
> >     Creating logical volume pvmove0
> >     activation/volume_list configuration setting not defined: Checking
> > only host tags for delta/home_r.
> >     Moving 167398 extents of logical volume delta/home_r.
> >     activation/volume_list configuration setting not defined: Checking
> > only host tags for delta/data_r.
> >   Internal error: Referenced LV pvmove0 not listed in VG delta.
> > 
> > This is with git master, but I see the same on 2.02.177.

This old comment stands out as possibly related:

  /* FIXME Cope with non-contiguous => splitting existing segments */

https://sourceware.org/git/?p=lvm2.git;a=blob;f=tools/pvmove.c;h=c5e39292228393d6d2ce0a21018dba5b5c306da5;hb=HEAD#l342

It seems you're trying to pvmove a range that covers two segments, which I
guess doesn't work (I don't know why it doesn't check for this to provide
a better error.)  If you pvmove segments separately it should avoid that
limitation (your test works for me if I do "pvmove
/dev/loop0:18122768-18909199" which avoids crossing a segment boundary.)



> Here is a short reproducer:
> 
> ------clip------
> #!/bin/sh
> 
> set -ex
> 
> mkdir -p lvmtestdir
> mount -t tmpfs none lvmtestdir
> cd lvmtestdir
> 
> truncate --size=$((156275497728*512)) testimg1
> truncate --size=$((46883372928*512)) testimg2
> 
> dev1="$(losetup -f --show testimg1)"
> dev2="$(losetup -f --show testimg2)"
> 
> pvcreate "$dev1"
> pvcreate "$dev2"
> 
> vgcreate TESTVG "$dev1" "$dev2"
> 
> lvcreate --name=lv0 -l $((1048576+167398)) TESTVG \
> 	"$dev1":0+655360 \
> 	"$dev1":17037866+393216 \
> 	"$dev1":18909200+167398
> lvcreate --name=lv1 -l $((16382506+1478118)) TESTVG \
> 	"$dev1":917504+16120362 \
> 	"$dev1":655360+262144 \
> 	"$dev1":17431082+1478118
> 
> # ERROR
> pvmove -v "$dev1":18122768-19076597 || :
> 
> # cleanup
> vgremove --force TESTVG
> losetup -d "$dev1"
> losetup -d "$dev2"
> cd ..
> sleep 1 # lvmtestdir busy?
> umount lvmtestdir
> ------clip------
> 
> 
> -- 
> Anssi Hannula
> 
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