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btrfs: account as waiting for IO, while waiting fot the flush bio completion 

Similar to what submit_bio_wait does, we should account for IO while
waiting for a bio completion. This has marginal visible effects, flush
bio is short-lived.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2017-06-15 16:04:26 +02:00
parent e0ae999414
commit 2980d5745f
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/disk-io.c
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@ -3519,7 +3519,7 @@ static int wait_dev_flush(struct btrfs_device *device)
return 0;
device->flush_bio_sent = 0;
wait_for_completion(&device->flush_wait);
wait_for_completion_io(&device->flush_wait);
if (bio->bi_error) {
ret = bio->bi_error;