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Commit d57d6115 authored by Stephane Gasparini's avatar Stephane Gasparini Committed by Jens Axboe
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kernel/fs: fix I/O wait not accounted for RW O_DSYNC 



 When a process is doing Random Write with O_DSYNC flag
 the I/O wait are not accounted in the kernel (get_cpu_iowait_time_us).
 This is preventing the governor or the cpufreq driver to account for
 I/O wait and thus use the right pstate

Signed-off-by: default avatarStephane Gasparini <stephane.gasparini@linux.intel.com>
Signed-off-by: default avatarPhilippe Longepe <philippe.longepe@linux.intel.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 09954bad

block/bio.c

+1 −1
Original line number Diff line number Diff line
@@ -874,7 +874,7 @@ int submit_bio_wait(int rw, struct bio *bio) 
	bio->bi_private = &ret;

	bio->bi_end_io = submit_bio_wait_endio;

	submit_bio(rw, bio);

	wait_for_completion(&ret.event);

	wait_for_completion_io(&ret.event);



	return ret.error;

}