2019-kvm-forum/4300-block-status-impact.html

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   5 <h1>Block status: does it change the status quo?</h1>
   6
   7 <p>
   8   Filler text - need a graphic here showing multiple combinations:
   9
  10   <br>[WZ] = WRITE_ZEROES
  11   <br>[BS] = BLOCK_STATUS
  12
  13 <pre>
  14                   O(1) server             O(n) server
  15 pre-patch         [WZ]                    [WZ...........]
  16
  17 status sees zero  [BS]                    [BS]
  18                   (no improvement)        (noticeably faster)
  19
  20 status sees data  [BS][WZ]                [BS][WZ...........]
  21                   (noticeably slower)     (marginally slower)
  22
  23 status is slow    [BS............]        [BS............]
  24                   (noticeably slower)     (noticeably slower)
  25 </pre>
  26
  27 </p>