MFC r279346:

MFC r279346:

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  r279346 | ken | 2015-02-26 19:44:12 -0700 (Thu, 26 Feb 2015) | 13 lines

  Remove an obsolete comment in devstat(3) about the accuracy of the
  milliseconds per transaction (DSM_MS_PER_TRANSACTION) calculation.

  The comment was accurate many years ago when the kernel didn't
  record I/O times on a per-I/O basis, but now that we do collect
  that information in most areas, it isn't correct.

  The milliseconds per transaction values are correct, assuming the
  I/O duration has been recorded.

  Sponsored by:	Spectra Logic

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git-svn-id: svn://svn.freebsd.org/base/stable/10@279545 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f