06 Mar, 2021

1 commit

• 4f44657d7   blk-cgroup: Fix the recursive blkg rwstat ... Browse Code »

  The current blkio.throttle.io_service_bytes_recursive doesn't
  work correctly.

  As an example, for the following blkcg hierarchy:
  (Made 1GB READ in test1, 512MB READ in test2)
  test
  / \
  test1 test2

  $ head -n 1 test/test1/blkio.throttle.io_service_bytes_recursive
  8:0 Read 1073684480
  $ head -n 1 test/test2/blkio.throttle.io_service_bytes_recursive
  8:0 Read 537448448
  $ head -n 1 test/blkio.throttle.io_service_bytes_recursive
  8:0 Read 537448448

  Clearly, above data of "test" reflects "test2" not "test1"+"test2".

  Do the correct summary in blkg_rwstat_recursive_sum().

  Signed-off-by: Xunlei Pang
  Signed-off-by: Jens Axboe

  Xunlei Pang

  2021-03-06 02:32:15 +0800  

08 Nov, 2019

1 commit

• 1d156646e   blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT ... Browse Code »

  blkg_rwstat is now only used by bfq-iosched and blk-throtl when on
  cgroup1. Let's move it into its own files and gate it behind a config
  option.

  Signed-off-by: Tejun Heo
  Signed-off-by: Jens Axboe

  Tejun Heo

  2019-11-08 03:28:13 +0800