Messages in this thread | | | Date | Fri, 26 Dec 2008 13:21:45 -0500 | From | Theodore Tso <> | Subject | Re: 2.6.28 ext4, xen and lvm volume becomes ro after snapshot |
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Hmm... ok, to summarize, you are seeing this problem with 2.6.28 (have you tried earlier kernel versions) when an LVM volume has a read/only snapshot in existence and you try to mount the LVM volume using ext4. If you mount the same LVM volume using ext3, you don't see any problems. Is that correct?
Can you try mounting ext3 with barriers enabled? Booting with the command linux option rootflags=barriers should do the trick. If that fails, then it would indicate that trying to enable barriers in a Xen guest while the host OS has created a snapshot of volume causes an I/O error, thus leading errors which you are seeing.
- Ted
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