> But "flushes all pending io" is *far* from trivial. there's no current > kernel functionality for this, so you'll have to do "weird shit" that will > break easy and often. > > Also "suspending" is rather dangerous because it can deadlock the machine > (think about the VM needing to write back dirty data on this LV in order to > make memory available for your move)... I don't think you need to suspend I/O except momentarily. I don't use LVM and while I can't resize volumes I migrate them like this mdhotadd /dev/md1 /dev/newvolume [wait for it to resync] mdhotremove /dev/md1 /dev/oldvolume the situation here seems analogous. You never need to suspend I/O to the volume until you actually kill it, by which time you can just skip the write to the dead volume. (The above procedure with ext3 does btw make a great backup system 8)) Alan _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
