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block: fix inconsistency in I/O stat accounting code

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This forces in_flight to be zero when turning off or on the I/O stat
accounting and stops updating I/O stats in attempt_merge() when
accounting is turned off.

Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jerome Marchand
2009-03-27 10:31:51 +01:00
committed by Jens Axboe
parent 6c7e8cee6a
commit 26308eab69
6 changed files with 33 additions and 26 deletions
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include/linux/elevator.h
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@@ -116,6 +116,7 @@ extern void elv_abort_queue(struct request_queue *);
extern void elv_completed_request(struct request_queue *, struct request *);
extern int elv_set_request(struct request_queue *, struct request *, gfp_t);
extern void elv_put_request(struct request_queue *, struct request *);
extern void elv_drain_elevator(struct request_queue *);
/*
* io scheduler registration