[PATCH 2/4] block: introduce part_[begin|end]_io_acct
From: Song Liu <hidden>
Date: 2020-08-18 07:03:21
Also in:
linux-bcache, linux-block
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
These functions can be used to enable iostat for partitions on devices like md, bcache. Signed-off-by: Song Liu <redacted> --- block/blk-core.c | 20 ++++++++++++++++---- include/linux/blkdev.h | 5 +++++ 2 files changed, 21 insertions(+), 4 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 93104c7470e8a..6603f56804f41 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c@@ -1455,10 +1455,9 @@ void blk_account_io_start(struct request *rq) part_stat_unlock(); } -unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors, +unsigned long part_start_io_acct(struct hd_struct *part, unsigned int sectors, unsigned int op) { - struct hd_struct *part = &disk->part0; const int sgrp = op_stat_group(op); unsigned long now = READ_ONCE(jiffies);
@@ -1471,12 +1470,18 @@ unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors, return now; } +EXPORT_SYMBOL(part_start_io_acct); + +unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors, + unsigned int op) +{ + return part_start_io_acct(&disk->part0, sectors, op); +} EXPORT_SYMBOL(disk_start_io_acct); -void disk_end_io_acct(struct gendisk *disk, unsigned int op, +void part_end_io_acct(struct hd_struct *part, unsigned int op, unsigned long start_time) { - struct hd_struct *part = &disk->part0; const int sgrp = op_stat_group(op); unsigned long now = READ_ONCE(jiffies); unsigned long duration = now - start_time;
@@ -1487,6 +1492,13 @@ void disk_end_io_acct(struct gendisk *disk, unsigned int op, part_stat_local_dec(part, in_flight[op_is_write(op)]); part_stat_unlock(); } +EXPORT_SYMBOL(part_end_io_acct); + +void disk_end_io_acct(struct gendisk *disk, unsigned int op, + unsigned long start_time) +{ + part_end_io_acct(&disk->part0, op, start_time); +} EXPORT_SYMBOL(disk_end_io_acct); /*
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 285b59cfc0646..894e55c91e1d8 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h@@ -1931,6 +1931,11 @@ unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors, void disk_end_io_acct(struct gendisk *disk, unsigned int op, unsigned long start_time); +unsigned long part_start_io_acct(struct hd_struct *part, unsigned int sectors, + unsigned int op); +void part_end_io_acct(struct hd_struct *part, unsigned int op, + unsigned long start_time); + /** * bio_start_io_acct - start I/O accounting for bio based drivers * @bio: bio to start account for
--
2.24.1