1. 01 Jul, 2020 3 commits
  2. 30 Jun, 2020 10 commits
  3. 29 Jun, 2020 16 commits
  4. 28 Jun, 2020 1 commit
  5. 26 Jun, 2020 1 commit
    • Jan Kara's avatar
      blktrace: Provide event for request merging · f3bdc62f
      Jan Kara authored
      Currently blk-mq does not report any event when two requests get merged
      in the elevator. This then results in difficult to understand sequence
      of events like:
      
      ...
        8,0   34     1579     0.608765271  2718  I  WS 215023504 + 40 [dbench]
        8,0   34     1584     0.609184613  2719  A  WS 215023544 + 56 <- (8,4) 2160568
        8,0   34     1585     0.609184850  2719  Q  WS 215023544 + 56 [dbench]
        8,0   34     1586     0.609188524  2719  G  WS 215023544 + 56 [dbench]
        8,0    3      602     0.609684162   773  D  WS 215023504 + 96 [kworker/3:1H]
        8,0   34     1591     0.609843593     0  C  WS 215023504 + 96 [0]
      
      and you can only guess (after quite some headscratching since the above
      excerpt is intermixed with a lot of other IO) that request 215023544+56
      got merged to request 215023504+40. Provide proper event for request
      merging like we used to do in the legacy block layer.
      Signed-off-by: default avatarJan Kara <jack@suse.cz>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
      f3bdc62f
  6. 24 Jun, 2020 9 commits