[dm-devel] kmalloc after down_write?

[Ming Zhang <mingz ele uri edu>]

I am reading dm-snap.c and found that in register_snapshot(),
http://lxr.linux.no/source/drivers/md/dm-snap.c?v=2.6.8.1#L159,
the kmalloc is called with rwsem held. I am not sure if this is a good
one since kmalloc may sleep as well.

ming