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author | Divyesh Shah <dpshah@google.com> | 2010-04-09 08:31:19 +0200 |
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committer | Jens Axboe <jens.axboe@oracle.com> | 2010-04-09 08:31:19 +0200 |
commit | 84c124da9ff50bd71fab9c939ee5b7cd8bef2bd9 (patch) | |
tree | f94ad03b56c71ebbe6b92265054c5e24af25b869 /include/linux/blkdev.h | |
parent | 31373d09da5b7fe21fe6f781e92bd534a3495f00 (diff) | |
download | linux-3.10-84c124da9ff50bd71fab9c939ee5b7cd8bef2bd9.tar.gz linux-3.10-84c124da9ff50bd71fab9c939ee5b7cd8bef2bd9.tar.bz2 linux-3.10-84c124da9ff50bd71fab9c939ee5b7cd8bef2bd9.zip |
blkio: Changes to IO controller additional stats patches
that include some minor fixes and addresses all comments.
Changelog: (most based on Vivek Goyal's comments)
o renamed blkiocg_reset_write to blkiocg_reset_stats
o more clarification in the documentation on io_service_time and io_wait_time
o Initialize blkg->stats_lock
o rename io_add_stat to blkio_add_stat and declare it static
o use bool for direction and sync
o derive direction and sync info from existing rq methods
o use 12 for major:minor string length
o define io_service_time better to cover the NCQ case
o add a separate reset_stats interface
o make the indexed stats a 2d array to simplify macro and function pointer code
o blkio.time now exports in jiffies as before
o Added stats description in patch description and
Documentation/cgroup/blkio-controller.txt
o Prefix all stats functions with blkio and make them static as applicable
o replace IO_TYPE_MAX with IO_TYPE_TOTAL
o Moved #define constant to top of blk-cgroup.c
o Pass dev_t around instead of char *
o Add note to documentation file about resetting stats
o use BLK_CGROUP_MODULE in addition to BLK_CGROUP config option in #ifdef
statements
o Avoid struct request specific knowledge in blk-cgroup. blk-cgroup.h now has
rq_direction() and rq_sync() functions which are used by CFQ and when using
io-controller at a higher level, bio_* functions can be added.
Signed-off-by: Divyesh Shah<dpshah@google.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/blkdev.h')
-rw-r--r-- | include/linux/blkdev.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index f3fff8bf85e..d483c494672 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1209,9 +1209,27 @@ static inline void set_io_start_time_ns(struct request *req) { req->io_start_time_ns = sched_clock(); } + +static inline uint64_t rq_start_time_ns(struct request *req) +{ + return req->start_time_ns; +} + +static inline uint64_t rq_io_start_time_ns(struct request *req) +{ + return req->io_start_time_ns; +} #else static inline void set_start_time_ns(struct request *req) {} static inline void set_io_start_time_ns(struct request *req) {} +static inline uint64_t rq_start_time_ns(struct request *req) +{ + return 0; +} +static inline uint64_t rq_io_start_time_ns(struct request *req) +{ + return 0; +} #endif #define MODULE_ALIAS_BLOCKDEV(major,minor) \ |