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disk infrastructure changes.
I put a patch at http://www.netbsd.org/~matt/ncq-disk-diffs.txt
It includes a set of related changes:
1) make disklabel handling in the disk driver more common.
Also allow variable sized disklabel ioctls removing compat code.
2) move replicated softc flags into struct disk.
3) NCQ support. Almost, ahcisata/siisata still need to increase the number of
to fully enable it. This requires moving things from the ata_channel to the
and being able to handle more than one outstanding xfer at a time.
I'm not a disk/storage person but these changes do work as little as I've
feedback is welcome.
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