ext4: fix credits computing for indirect mapped files
authorYongqiang Yang <xiaoqiangnk@gmail.com>
Mon, 4 Apr 2011 19:40:24 +0000 (15:40 -0400)
committerTheodore Ts'o <tytso@mit.edu>
Mon, 4 Apr 2011 19:40:24 +0000 (15:40 -0400)
commit5b41395fcc0265fc9f193aef9df39ce49d64677c
tree3e9ce0bc590399f78808fce8279d04c61301beb8
parent21f976975cbecbdaf23ceeacc1cab2b1c05a028e
ext4: fix credits computing for indirect mapped files

When writing a contiguous set of blocks, two indirect blocks could be
needed depending on how the blocks are aligned, so we need to increase
the number of credits needed by one.

[ Also fixed a another bug which could further underestimate the
  number of journal credits needed by 1; the code was using integer
  division instead of DIV_ROUND_UP() -- tytso]

Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
fs/ext4/inode.c