Re: [PATCH for-6.2/block V3 1/2] block: Data type conversion for IO accounting

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On 12/21/22 06:05, Gulam Mohamed wrote:
Change the data type of start and end time IO accounting variables in,
block layer, from "unsigned long" to "u64". This is to enable nano-seconds
granularity, in next commit, for the devices whose latency is less than
milliseconds.

Changes from V2 to V3
=====================
1. Changed all the required variables data-type to u64 as part of this
    first patch
2. Create a new setting '2' for iostats in sysfs in next patch
3. Change the code to get the ktime values when iostat=2 in next patch

Signed-off-by: Gulam Mohamed <gulam.mohamed@xxxxxxxxxx>
---
  block/blk-core.c              | 24 ++++++++++++------------
  block/blk.h                   |  2 +-
  drivers/block/drbd/drbd_int.h |  2 +-
  drivers/block/zram/zram_drv.c |  4 ++--
  drivers/md/bcache/request.c   | 10 +++++-----
  drivers/md/dm-core.h          |  2 +-
  drivers/md/dm.c               |  2 +-
  drivers/md/md.h               |  2 +-
  drivers/md/raid1.h            |  2 +-
  drivers/md/raid10.h           |  2 +-
  drivers/md/raid5.c            |  2 +-
  drivers/nvdimm/btt.c          |  2 +-
  drivers/nvdimm/pmem.c         |  2 +-
  include/linux/blk_types.h     |  2 +-
  include/linux/blkdev.h        | 12 ++++++------
  include/linux/part_stat.h     |  2 +-

nvme-mpath now also has stats, so struct nvme_request should also be
updated.



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