* [PATCH] md/raid10: optimize read_balance() for 'far offset' arrays
@ 2011-06-08 7:57 Namhyung Kim
0 siblings, 0 replies; only message in thread
From: Namhyung Kim @ 2011-06-08 7:57 UTC (permalink / raw)
To: Neil Brown; +Cc: linux-raid
If @conf->far_offset > 0, there is only 1 stripe so that we can treat
the array same as 'near' arrays.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
---
drivers/md/raid10.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 6e846688962f..fc56bdd8c3fb 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -531,7 +531,7 @@ retry:
break;
/* for far > 1 always use the lowest address */
- if (conf->far_copies > 1)
+ if (conf->far_copies > 1 && conf->far_offset == 0)
new_distance = r10_bio->devs[slot].addr;
else
new_distance = abs(r10_bio->devs[slot].addr -
--
1.7.5.2
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