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block: make blk_do_io_stat() do the full "is this rq accountable" checks 

We currently check for file system requests outside of blk_do_io_stat(rq),
but we may as well just include it.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2009-04-24 08:10:11 +02:00
parent 731ec497e5
commit c2553b5844
2 changed files with 11 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
block/blk-core.c
View File

@ -68,7 +68,7 @@ static void drive_stat_acct(struct request *rq, int new_io)
int rw = rq_data_dir(rq);
int cpu;
if (!blk_fs_request(rq) || !blk_do_io_stat(rq))
if (!blk_do_io_stat(rq))
return;
cpu = part_stat_lock();
@ -1639,10 +1639,7 @@ EXPORT_SYMBOL(blkdev_dequeue_request);
static void blk_account_io_completion(struct request *req, unsigned int bytes)
{
if (!blk_do_io_stat(req))
return;
if (blk_fs_request(req)) {
if (blk_do_io_stat(req)) {
const int rw = rq_data_dir(req);
struct hd_struct *part;
int cpu;
@ -1656,15 +1653,12 @@ static void blk_account_io_completion(struct request *req, unsigned int bytes)
static void blk_account_io_done(struct request *req)
{
if (!blk_do_io_stat(req))
return;
/*
* Account IO completion. bar_rq isn't accounted as a normal
* IO on queueing nor completion. Accounting the containing
* request is enough.
*/
if (blk_fs_request(req) && req != &req->q->bar_rq) {
if (blk_do_io_stat(req) && req != &req->q->bar_rq) {
unsigned long duration = jiffies - req->start_time;
const int rw = rq_data_dir(req);
struct hd_struct *part;

9
block/blk.h
View File

@ -149,9 +149,16 @@ static inline int blk_cpu_to_group(int cpu)
#endif
}
/*
* Contribute to IO statistics IFF:
*
* a) it's attached to a gendisk, and
* b) the queue had IO stats enabled when this request was started, and
* c) it's a file system request
*/
static inline int blk_do_io_stat(struct request *rq)
{
return rq->rq_disk && blk_rq_io_stat(rq);
return rq->rq_disk && blk_rq_io_stat(rq) && blk_fs_request(rq);
}
#endif