diff options
| author | Nikanth Karthikesan <knikanth@suse.de> | 2009-09-11 09:18:54 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-09-14 08:24:52 +0200 |
| commit | a9327cac440be4d8333bba975cbbf76045096275 (patch) | |
| tree | 83fd5dc45dc925c5b4eb0264c3add96cfaa4cae6 /block/blk-core.c | |
| parent | 18d8217bc441630c3c5ec7416c5a65c69e8a0979 (diff) | |
| download | lwn-a9327cac440be4d8333bba975cbbf76045096275.tar.gz lwn-a9327cac440be4d8333bba975cbbf76045096275.zip | |
Seperate read and write statistics of in_flight requests
Currently, there is a single in_flight counter measuring the number of
requests in the request_queue. But some monitoring tools would like to
know how many read requests and write requests are in progress. Split the
current in_flight counter into two seperate counters for read and write.
This information is exported as a sysfs attribute, as changing the
currently available stat files would break the existing tools.
Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-core.c')
| -rw-r--r-- | block/blk-core.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 982d634e67f9..182ebe3eb9e0 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -69,7 +69,7 @@ static void drive_stat_acct(struct request *rq, int new_io) part_stat_inc(cpu, part, merges[rw]); else { part_round_stats(cpu, part); - part_inc_in_flight(part); + part_inc_in_flight(part, rw); } part_stat_unlock(); @@ -1030,7 +1030,7 @@ static void part_round_stats_single(int cpu, struct hd_struct *part, if (part->in_flight) { __part_stat_add(cpu, part, time_in_queue, - part->in_flight * (now - part->stamp)); + part_in_flight(part) * (now - part->stamp)); __part_stat_add(cpu, part, io_ticks, (now - part->stamp)); } part->stamp = now; @@ -1737,7 +1737,7 @@ static void blk_account_io_done(struct request *req) part_stat_inc(cpu, part, ios[rw]); part_stat_add(cpu, part, ticks[rw], duration); part_round_stats(cpu, part); - part_dec_in_flight(part); + part_dec_in_flight(part, rw); part_stat_unlock(); } |