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authorTheodore Ts'o <tytso@mit.edu>2009-09-28 00:06:20 -0400
committerTheodore Ts'o <tytso@mit.edu>2009-09-28 00:06:20 -0400
commit71780577306fd1e76c7a92e3b308db624d03adb9 (patch)
tree37c6dac6475dedbef288a11765f9c6733b526fa8 /fs/ext4/mballoc.c
parent1693918e0b6988cf5eb93b7da34f30e94360a379 (diff)
downloadlwn-71780577306fd1e76c7a92e3b308db624d03adb9.tar.gz
lwn-71780577306fd1e76c7a92e3b308db624d03adb9.zip
ext4: Fix hueristic which avoids group preallocation for closed files
The hueristic was designed to avoid using locality group preallocation when writing the last segment of a closed file. Fix it by move setting size to the maximum of size and isize until after we check whether size == isize. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/mballoc.c')
-rw-r--r--fs/ext4/mballoc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index e9c61896d605..c73d43995b13 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4189,7 +4189,6 @@ static void ext4_mb_group_or_file(struct ext4_allocation_context *ac)
size = ac->ac_o_ex.fe_logical + ac->ac_o_ex.fe_len;
isize = (i_size_read(ac->ac_inode) + ac->ac_sb->s_blocksize - 1)
>> bsbits;
- size = max(size, isize);
if ((size == isize) &&
!ext4_fs_is_busy(sbi) &&
@@ -4199,6 +4198,7 @@ static void ext4_mb_group_or_file(struct ext4_allocation_context *ac)
}
/* don't use group allocation for large files */
+ size = max(size, isize);
if (size >= sbi->s_mb_stream_request) {
ac->ac_flags |= EXT4_MB_STREAM_ALLOC;
return;