K 10
svn:author
V 5
gibbs
K 8
svn:date
V 27
2009-12-28T18:59:13.087499Z
K 7
svn:log
V 360
Correct alignment and boundary constraints in blkfront's bus dma tag.  The
blkif interface in Xen requires all I/O to be 512 byte aligned with each
segment bounded by a 4k page.

Note: This submission only documents the proper contraints for blkif I/O.
      The alignment code in busdma does not yet handle alignment constraints
      correctly in all cases.

END