[RFC] ext4: fix a BUG in ext4_mpage_readpages()
From: yalin wang <hidden>
Date: 2015-11-04 07:58:52
Also in:
lkml
Subsystem:
ext4 file system, filesystems (vfs and infrastructure), the rest · Maintainers:
"Theodore Ts'o", Alexander Viro, Christian Brauner, Linus Torvalds
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 <redacted> --- 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