kib 23f577dda4 Support unmapped i/o for the md(4). ... The vnode-backed md(4) has to map the unmapped bio because VOP_READ() and VOP_WRITE() interfaces do not allow to pass unmapped requests to the filesystem. Vnode-backed md(4) uses pbufs instead of relying on the bio_transient_map, to avoid usual md deadlock. Sponsored by: The FreeBSD Foundation Tested by: pho, scottl		2013-03-19 14:53:23 +00:00
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md.c	Support unmapped i/o for the md(4).	2013-03-19 14:53:23 +00:00