As I had brought up during one of the lightning talks at the Linux
Storage and Filesystem workshop, I am interested in introducing two new
open flags, O_HOT and O_COLD. These flags are passed down to the
individual file system's inode operations' create function, and the file
system can use these flags as a hint regarding whether the file is
likely to be accessed frequently or not.
In the future I plan to do further work on how ext4 would use these
flags, but I want to first get the ability to pass these flags plumbed
into the VFS layer and the code points for O_HOT and O_COLD reserved.
Theodore Ts'o (3):
fs: add new open flags O_HOT and O_COLD
fs: propagate the open_flags structure down to the low-level fs's
create()
ext4: use the O_HOT and O_COLD open flags to influence inode
allocation
fs/9p/vfs_inode.c | 2 +-
fs/affs/affs.h | 2 +-
fs/affs/namei.c | 3 ++-
fs/bfs/dir.c | 2 +-
fs/btrfs/inode.c | 3 ++-
fs/cachefiles/namei.c | 3 ++-
fs/ceph/dir.c | 2 +-
fs/cifs/dir.c | 2 +-
fs/coda/dir.c | 3 ++-
fs/ecryptfs/inode.c | 5 +++--
fs/exofs/namei.c | 2 +-
fs/ext2/namei.c | 4 +++-
fs/ext3/namei.c | 5 +++--
fs/ext4/ext4.h | 8 +++++++-
fs/ext4/ialloc.c | 33 +++++++++++++++++++++++++++------
fs/ext4/migrate.c | 2 +-
fs/ext4/namei.c | 17 ++++++++++++-----
fs/fat/namei_msdos.c | 2 +-
fs/fat/namei_vfat.c | 2 +-
fs/fcntl.c | 5 +++--
fs/fuse/dir.c | 2 +-
fs/gfs2/inode.c | 3 ++-
fs/hfs/dir.c | 2 +-
fs/hfsplus/dir.c | 5 +++--
fs/hostfs/hostfs_kern.c | 2 +-
fs/hugetlbfs/inode.c | 4 +++-
fs/internal.h | 6 ------
fs/jffs2/dir.c | 5 +++--
fs/jfs/namei.c | 2 +-
fs/logfs/dir.c | 2 +-
fs/minix/namei.c | 2 +-
fs/namei.c | 9 +++++----
fs/ncpfs/dir.c | 5 +++--
fs/nfs/dir.c | 6 ++++--
fs/nfsd/vfs.c | 4 ++--
fs/nilfs2/namei.c | 2 +-
fs/ocfs2/namei.c | 3 ++-
fs/omfs/dir.c | 2 +-
fs/ramfs/inode.c | 3 ++-
fs/reiserfs/namei.c | 5 +++--
fs/sysv/namei.c | 4 +++-
fs/ubifs/dir.c | 2 +-
fs/udf/namei.c | 2 +-
fs/ufs/namei.c | 2 +-
fs/xfs/xfs_iops.c | 3 ++-
include/asm-generic/fcntl.h | 7 +++++++
include/linux/fs.h | 14 ++++++++++++--
ipc/mqueue.c | 2 +-
48 files changed, 143 insertions(+), 74 deletions(-)
--
1.7.10.rc3
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