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| author | Stephane Gasparini <stephane.gasparini@linux.intel.com> | 2016-02-09 17:07:38 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-02-09 09:27:01 -0700 |
| commit | d57d611505d911c6f9f81cd9bd6dbd293d66dd9f (patch) | |
| tree | e4616ad08b32aa47a3050e42e706d20212c8955f | |
| parent | 09954bad448791ef01202351d437abdd9497a804 (diff) | |
| download | linux-stable-d57d611505d911c6f9f81cd9bd6dbd293d66dd9f.tar.gz linux-stable-d57d611505d911c6f9f81cd9bd6dbd293d66dd9f.tar.bz2 linux-stable-d57d611505d911c6f9f81cd9bd6dbd293d66dd9f.zip | |
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: Stephane Gasparini <stephane.gasparini@linux.intel.com>
Signed-off-by: Philippe Longepe <philippe.longepe@linux.intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | block/bio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/bio.c b/block/bio.c index dbabd48b1934..f53a691b6533 100644 --- a/block/bio.c +++ b/block/bio.c @@ -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; } |