Hi Jens,
This version has below changes:
1. remove BLK_ADDITIONAL_DISKSTAT option per Christoph's comment.
2. move blk_queue_io_extra_stat into blk_additional_{latency,sector}
per Christoph's comment.
3. simplify blk_additional_latency by pass duration time directly.
Thanks,
Guoqing
PATCH V1: https://marc.info/?l=linux-block&m=161176000024443&w=2
* add Jack's reviewed-by.
RFC V4: https://marc.info/?l=linux-block&m=161027198729158&w=2
* rebase with latest code.
RFC V3: https://marc.info/?l=linux-block&m=159730633416534&w=2
* 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
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 | 5 ++
block/blk-core.c | 43 ++++++++++++++++
block/blk-sysfs.c | 3 ++
block/genhd.c | 74 +++++++++++++++++++++++++++
include/linux/blkdev.h | 2 +
include/linux/part_stat.h | 6 +++
7 files changed, 159 insertions(+)
--
2.17.1
