From: Guoqing Jiang <guoqing.jiang@xxxxxxxxxxxxxxx>
Hi,
This version has below changes:
* Move the #ifdef CONFIG_BLK_ADDITIONAL_DISKSTAT into the function body
per Johannes's comment.
* Tweak the output of two tables to make they are more intuitive. See
below io_size table, and io_latency table replaces KB with ms.
# cat /sys/block/md0/io_size
[ 0 - 1 ) KB: 0 0 0 0
[ 1 - 2 ) KB: 0 0 0 0
[ 2 - 4 ) KB: 0 0 0 0
[ 4 - 8 ) KB: 0 0 0 0
[ 8 - 16 ) KB: 0 0 0 0
[ 16 - 32 ) KB: 0 0 0 0
[ 32 - 64 ) KB: 0 0 0 0
[ 64 - 128 ) KB: 0 0 0 0
[ 128 - 256 ) KB: 0 0 0 0
[ 256 - 512 ) KB: 0 0 0 0
[ 512 - 1024 ) KB: 0 0 0 0
>= 1024 KB: 0 0 0 0
Thanks,
Guoqing
RFC V2: https://marc.info/?l=linux-block&m=159467483514062&w=2
* don't call ktime_get_ns and drop unnecessary patches.
* add io_extra_stats to avoid potential overhead.
RFC V1: https://marc.info/?l=linux-block&m=159419516730386&w=2
Guoqing Jiang (4):
block: add a statistic table for io latency
block: add a statistic table for io sector
block: add io_extra_stats node
block: call blk_additional_{latency,sector} only when io_extra_stats
is true
Documentation/ABI/testing/sysfs-block | 26 +++++++++
Documentation/block/queue-sysfs.rst | 6 +++
block/Kconfig | 9 ++++
block/blk-core.c | 51 ++++++++++++++++++
block/blk-sysfs.c | 8 +++
block/genhd.c | 78 +++++++++++++++++++++++++++
include/linux/blkdev.h | 2 +
include/linux/part_stat.h | 8 +++
8 files changed, 188 insertions(+)
--
2.17.1
