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| author | Jeff Garzik <jgarzik@pobox.com> | 2005-11-29 03:55:47 -0500 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-11-29 03:55:47 -0500 |
| commit | b71d4da092801634d04190693a38ca03bdbe2505 (patch) | |
| tree | e4adc88ade5832b844768c114b15d4d97253c4d0 /drivers/md/raid10.c | |
| parent | 656563e32c3f1dfdc35b3944305ece1c5dfeade5 (diff) | |
| parent | 624f54be206adf970cd8eece16446b027913e533 (diff) | |
| download | blackbird-op-linux-b71d4da092801634d04190693a38ca03bdbe2505.tar.gz blackbird-op-linux-b71d4da092801634d04190693a38ca03bdbe2505.zip | |
Merge branch 'master'
Diffstat (limited to 'drivers/md/raid10.c')
| -rw-r--r-- | drivers/md/raid10.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 867f06ae33d9..713dc9c2c730 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -552,7 +552,11 @@ static int read_balance(conf_t *conf, r10bio_t *r10_bio) !test_bit(In_sync, &rdev->flags)) continue; - if (!atomic_read(&rdev->nr_pending)) { + /* This optimisation is debatable, and completely destroys + * sequential read speed for 'far copies' arrays. So only + * keep it for 'near' arrays, and review those later. + */ + if (conf->near_copies > 1 && !atomic_read(&rdev->nr_pending)) { disk = ndisk; slot = nslot; break; |
