From: yalin wang <yalin.wang2010@gmail.com>
To: tytso@mit.edu, adilger.kernel@dilger.ca,
linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: yalin wang <yalin.wang2010@gmail.com>
Subject: [RFC] ext4: fix a BUG in ext4_mpage_readpages()
Date: Wed, 4 Nov 2015 15:58:34 +0800 [thread overview]
Message-ID: <1446623914-9367-1-git-send-email-yalin.wang2010@gmail.com> (raw)
The last block should be the total read pages last block,
need adjust the block number when caculate every page.
Signed-off-by: yalin wang <yalin.wang2010@gmail.com>
---
fs/ext4/readpage.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c
index 5dc5e95..d20c39d 100644
--- a/fs/ext4/readpage.c
+++ b/fs/ext4/readpage.c
@@ -174,7 +174,7 @@ int ext4_mpage_readpages(struct address_space *mapping,
goto confused;
block_in_file = (sector_t)page->index << (PAGE_CACHE_SHIFT - blkbits);
- last_block = block_in_file + nr_pages * blocks_per_page;
+ last_block = block_in_file + (nr_pages - page_idx) * blocks_per_page;
last_block_in_file = (i_size_read(inode) + blocksize - 1) >> blkbits;
if (last_block > last_block_in_file)
last_block = last_block_in_file;
--
1.9.1
next reply other threads:[~2015-11-04 7:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-04 7:58 yalin wang [this message]
2015-11-05 15:40 ` [RFC] ext4: fix a BUG in ext4_mpage_readpages() Jan Kara
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