From: Namhyung Kim <namhyung@gmail.com>
To: Neil Brown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org
Subject: [PATCH] md/raid10: optimize read_balance() for 'far offset' arrays
Date: Wed, 8 Jun 2011 16:57:18 +0900 [thread overview]
Message-ID: <1307519838-6869-1-git-send-email-namhyung@gmail.com> (raw)
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
reply other threads:[~2011-06-08 7:57 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1307519838-6869-1-git-send-email-namhyung@gmail.com \
--to=namhyung@gmail.com \
--cc=linux-raid@vger.kernel.org \
--cc=neilb@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox