aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux
diff options
context:
space:
mode:
authorDivyesh Shah <dpshah@google.com>2010-04-09 08:31:19 +0200
committerJens Axboe <jens.axboe@oracle.com>2010-04-09 08:31:19 +0200
commit84c124da9ff50bd71fab9c939ee5b7cd8bef2bd9 (patch)
treef94ad03b56c71ebbe6b92265054c5e24af25b869 /include/linux
parent31373d09da5b7fe21fe6f781e92bd534a3495f00 (diff)
downloadmrst-s0i3-test-84c124da9ff50bd71fab9c939ee5b7cd8bef2bd9.tar.gz
mrst-s0i3-test-84c124da9ff50bd71fab9c939ee5b7cd8bef2bd9.tar.xz
mrst-s0i3-test-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')
-rw-r--r--include/linux/blkdev.h18
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) \