From: Yongqiang Yang <xiaoqiangnk@gmail.com>
To: tytso@mit.edu
Cc: linux-ext4@vger.kernel.org, Yongqiang Yang <xiaoqiangnk@gmail.com>
Subject: [PATCH] ext4:Fix credits computing for indirect mapped files.
Date: Fri, 25 Mar 2011 21:10:05 +0800 [thread overview]
Message-ID: <1301058605-29978-1-git-send-email-xiaoqiangnk@gmail.com> (raw)
Either the first block or the last one could be not aligned with
block boundary, 1 block is needed to fix it.
Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
---
fs/ext4/inode.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 67e7a3c..7193f23 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5380,11 +5380,11 @@ static int ext4_indirect_trans_blocks(struct inode *inode, int nrblocks,
if (chunk) {
/*
* With N contiguous data blocks, it need at most
- * N/EXT4_ADDR_PER_BLOCK(inode->i_sb) indirect blocks
+ * N/EXT4_ADDR_PER_BLOCK(inode->i_sb) + 1 indirect blocks
* 2 dindirect blocks
* 1 tindirect block
*/
- indirects = nrblocks / EXT4_ADDR_PER_BLOCK(inode->i_sb);
+ indirects = nrblocks / EXT4_ADDR_PER_BLOCK(inode->i_sb) + 1;
return indirects + 3;
}
/*
--
1.7.4
next reply other threads:[~2011-03-25 13:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-25 13:10 Yongqiang Yang [this message]
2011-04-04 19:39 ` [PATCH] ext4:Fix credits computing for indirect mapped files Ted Ts'o
2011-04-05 5:02 ` Yongqiang Yang
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