On Fri, 12 May 2006, David Robinson wrote:
im playing around with Xen and FC5. There is one thing i dont get working.
When i resize a logical volume in dom0 with lvextend, and this volume is
used and mounted in a domU, it seems that the domU does not notice the new
size of the partition until rebooted. ext2online does nothing, fdisk
reports the old size.
the kernel wouldn't be aware of the size change hence why fdisk reports the
old size. try running "partprobe" - it basically tells the kernel to reread
the partition table
I tried this, but partprobe does not seem to work.
But should it? In my testcase there are no partition tables at all. I
export a lvm volume as partition:
lvcreate -L1g vg0 part1
xm block-attach fc5dom phy:vg0/part1 /dev/hdp rw
Then, inside of the domU, i do:
mount /dev/hdp /mnt/tmp
So, if i don't miss anything, then there is no partition table that
can be reloaded.
But then, i tried to create a partition table and mount e.g. hdp1 and
it did not work either. Even after calling partprobe, i was not able
to grow the filesystem and fdisk reports the old size.
In all cases everything works after rebooting the domU, so i know that
i did not fail doing the lvextend. Is there anything else i can try?
Can it be that using LVM volumes and growing them on the fly for domUs
is not supported, or could it be a bug?
Thanks a lot,
Heinz
--
Heinz Deinhart
heinz@xxxxxx
