From: Namhyung Kim <namhyung@gmail.com>
To: Neil Brown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org
Subject: [PATCH v2 1/5] md/raid10: optimize read_balance() for 'far offset' arrays
Date: Wed, 15 Jun 2011 11:02:00 +0900 [thread overview]
Message-ID: <1308103324-2375-2-git-send-email-namhyung@gmail.com> (raw)
In-Reply-To: <1308103324-2375-1-git-send-email-namhyung@gmail.com>
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
next prev parent reply other threads:[~2011-06-15 2:02 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-15 2:01 [PATCH RESEND 0/5] md/raid10 changes Namhyung Kim
2011-06-15 2:02 ` Namhyung Kim [this message]
2011-06-15 2:57 ` [PATCH v2 1/5] md/raid10: optimize read_balance() for 'far offset' arrays NeilBrown
2011-06-15 6:51 ` Keld Jørn Simonsen
2011-06-15 12:25 ` Namhyung Kim
2011-06-15 14:35 ` Namhyung Kim
2011-06-15 23:56 ` NeilBrown
2011-06-15 2:02 ` [PATCH 2/5] md/raid10: get rid of duplicated conditional expression Namhyung Kim
2011-06-15 2:02 ` [PATCH 3/5] md/raid10: factor out common bio handling code Namhyung Kim
2011-06-15 2:02 ` [PATCH v2 4/5] md/raid10: share pages between read and write bio's during recovery Namhyung Kim
2011-06-15 2:02 ` [PATCH 5/5] md/raid10: spread read for subordinate r10bios " Namhyung Kim
2011-06-15 3:09 ` NeilBrown
2011-06-15 3:09 ` [PATCH RESEND 0/5] md/raid10 changes NeilBrown
2011-06-15 3:33 ` Namhyung Kim
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