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From: Chandan Rajendra <chandan@linux.vnet.ibm.com>
To: linux-btrfs@vger.kernel.org
Cc: Chandan Rajendra <chandan@linux.vnet.ibm.com>, chandan@mykolab.com
Subject: [PATCH] Btrfs: btrfs_defrag_file: Fix calculation of max_to_defrag.
Date: Wed,  3 Jun 2015 14:59:54 +0530	[thread overview]
Message-ID: <1433323794-10045-1-git-send-email-chandan@linux.vnet.ibm.com> (raw)

max_to_defrag represents the number of pages to defrag rather than the last
page of the file range to be defragged. Fix this.

Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
---
 fs/btrfs/ioctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index ca5d968..2a45026 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1318,7 +1318,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
 		i = range->start >> PAGE_CACHE_SHIFT;
 	}
 	if (!max_to_defrag)
-		max_to_defrag = last_index + 1;
+		max_to_defrag = last_index - i + 1;
 
 	/*
 	 * make writeback starts from i, so the defrag range can be
-- 
2.1.0


             reply	other threads:[~2015-06-03  9:31 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-03  9:29 Chandan Rajendra [this message]
2015-06-03 10:41 ` [PATCH] Btrfs: btrfs_defrag_file: Fix calculation of max_to_defrag David Sterba
2015-06-03 12:46   ` Chandan Rajendra
2015-06-05 13:09     ` David Sterba

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