K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2014-06-26T20:06:37.036216Z
K 7
svn:log
V 445
Simplify statistics calculation.

Instead of trying to guess size of disk I/O operations (it just won't work
that way for newly added commands, and is equal to data move size for old
ones), account data move traffic.  If disk I/Os are that interesting, then
backends have to account and provide that information.

Block backend already exports the information about disk I/Os via devstat,
so having it here too is excessive.

MFC after:	2 weeks

END