Hi all, I found there're changes to udev/10-dm.rules.in, which tries to add support for uevent triggered outside of libdevmapper. Think this is a great step. In current situation, if an admin calls "echo add > /sys/block/dm-N/uevent", the symlinks in /dev/mapper and /dev/$VGNAME/ will still be removed anyway. I'm not sure who many realistic application will trigger the 'add' event in users space out side the libdevmapper. But I think it'll be more friendly to udev ;) The attached 10-dm.rules.in is an attempt on this direction. It basically import{db} if the events are not trigged by libdevmapper. Please comment. Thanks.
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