passes down hints with its policy.
alloc_mode=%s Adjust block allocation policy, which supports "reuse"
and "default".
-fsync_mode=%s Control the policy of fsync. Currently supports "posix"
- and "strict". In "posix" mode, which is default, fsync
- will follow POSIX semantics and does a light operation
- to improve the filesystem performance. In "strict" mode,
- fsync will be heavy and behaves in line with xfs, ext4
- and btrfs, where xfstest generic/342 will pass, but the
- performance will regress.
+fsync_mode=%s Control the policy of fsync. Currently supports "posix",
+ "strict", and "nobarrier". In "posix" mode, which is
+ default, fsync will follow POSIX semantics and does a
+ light operation to improve the filesystem performance.
+ In "strict" mode, fsync will be heavy and behaves in line
+ with xfs, ext4 and btrfs, where xfstest generic/342 will
+ pass, but the performance will regress. "nobarrier" is
+ based on "posix", but doesn't issue flush command for
+ non-atomic files likewise "nobarrier" mount option.
test_dummy_encryption Enable dummy encryption, which provides a fake fscrypt
context. The fake fscrypt context is used by xfstests.
enum fsync_mode {
FSYNC_MODE_POSIX, /* fsync follows posix semantics */
FSYNC_MODE_STRICT, /* fsync behaves in line with ext4 */
+ FSYNC_MODE_NOBARRIER, /* fsync behaves nobarrier based on posix */
};
#ifdef CONFIG_F2FS_FS_ENCRYPTION
remove_ino_entry(sbi, ino, APPEND_INO);
clear_inode_flag(inode, FI_APPEND_WRITE);
flush_out:
- if (!atomic)
+ if (!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER)
ret = f2fs_issue_flush(sbi, inode->i_ino);
if (!ret) {
remove_ino_entry(sbi, ino, UPDATE_INO);
} else if (strlen(name) == 6 &&
!strncmp(name, "strict", 6)) {
F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
+ } else if (strlen(name) == 9 &&
+ !strncmp(name, "nobarrier", 9)) {
+ F2FS_OPTION(sbi).fsync_mode =
+ FSYNC_MODE_NOBARRIER;
} else {
kfree(name);
return -EINVAL;