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authorLukas Czerner <lczerner@redhat.com>2013-03-12 12:40:04 -0400
committerTheodore Ts'o <tytso@mit.edu>2013-03-12 12:40:04 -0400
commit4f42f80a8f08d4c3f52c4267361241885d5dee3a (patch)
tree7c41541fe7d89daef1e511d46b0853f85f70d589 /fs
parent90ba983f6889e65a3b506b30dc606aa9d1d46cd2 (diff)
downloadlinux-4f42f80a8f08d4c3f52c4267361241885d5dee3a.tar.gz
ext4: use s_extent_max_zeroout_kb value as number of kb
Currently when converting extent to initialized, we have to decide whether to zeroout part/all of the uninitialized extent in order to avoid extent tree growing rapidly. The decision is made by comparing the size of the extent with the configurable value s_extent_max_zeroout_kb which is in kibibytes units. However when converting it to number of blocks we currently use it as it was in bytes. This is obviously bug and it will result in ext4 _never_ zeroout extents, but rather always split and convert parts to initialized while leaving the rest uninitialized in default setting. Fix this by using s_extent_max_zeroout_kb as kibibytes. Signed-off-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
Diffstat (limited to 'fs')
-rw-r--r--fs/ext4/extents.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index bd69e906bd9..e2bb929bea9 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3264,7 +3264,7 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
if (EXT4_EXT_MAY_ZEROOUT & split_flag)
max_zeroout = sbi->s_extent_max_zeroout_kb >>
- inode->i_sb->s_blocksize_bits;
+ (inode->i_sb->s_blocksize_bits - 10);
/* If extent is less than s_max_zeroout_kb, zeroout directly */
if (max_zeroout && (ee_len <= max_zeroout)) {