On 10/02/2012 04:30 PM, Doug Goldstein wrote: > On Tue, Oct 2, 2012 at 12:16 PM, Guido Günther <agx@xxxxxxxxxxx> wrote: >> Hi, >> creating a vm with a virtual disk in an lvm pool e.g. via: >> >> virt-install --disk=pool=vm_test,size=3.0 ... >> >> results in (from libvirtd's log): >> >> virCommandWait:2332 : internal error Child process (/sbin/lvcreate --name test01.img -L 0K --virtualsize 3145728K vg_vm_test) unexpected exit status 5: Unable to create new logical volume with no extents >> >> However using >> >> virt-install --disk=pool=vm_test,size=3.0,sparce=false ... >> >> works. I wonder what's the correct place to make sure we don't try to >> create LVM volumes with a zero allocation by default? >> Cheers, >> -- Guido > > I actually very recently brought this up on libvirt's IRC channel. The > question is do we want to disallow sparse allocations on LVM entirely? > Or just some small percentage be allocated and then grow to the > correct size. I feel the correct place to fix this is within libvirt > itself. > Fedora 18 had a bug filed about this: https://bugzilla.redhat.com/show_bug.cgi?id=866481 I just sent a libvirt patch that turns lvm allocation=0 into allocation=1 at lvcreate time: https://www.redhat.com/archives/libvir-list/2012-October/msg00857.html - Cole
