From: "majianpeng" <majianpeng@gmail.com>
To: Neil Brown <neilb@suse.de>
Cc: linux-raid <linux-raid@vger.kernel.org>
Subject: [PATCH] md/raid1:use bi->bv_len instead of PAGE_SIZE.
Date: Sat, 31 Mar 2012 16:05:35 +0800 [thread overview]
Message-ID: <201203311605306405927@gmail.com> (raw)
From 3d3a7eafc73f9de3eb6386ba4f30717412b6b255 Mon Sep 17 00:00:00 2001
From: majianpeng <majianpeng@gmail.com>
Date: Sat, 31 Mar 2012 16:01:58 +0800
Subject: [PATCH] md/raid1:use bi->bv_len instead of PAGE_SIZE.
If bv_len is less PAGE_SIZE,then memcpy will waste time.
Signed-off-by: majianpeng <majianpeng@gmail.com>
---
drivers/md/raid1.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 4a40a20..a623f70 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1775,7 +1775,7 @@ static int process_checks(struct r1bio *r1_bio)
size -= PAGE_SIZE;
memcpy(page_address(bi->bv_page),
page_address(pbio->bi_io_vec[j].bv_page),
- PAGE_SIZE);
+ bi->bv_len);
}
}
return 0;
--
1.7.5.4
--------------
majianpeng
2012-03-31
reply other threads:[~2012-03-31 8:05 UTC|newest]
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