8c0a85377048b64c880e76ec7368904fe46d0b94 - kernel/common

commit	8c0a85377048b64c880e76ec7368904fe46d0b94	[log] [tgz]
author	Kirill A. Shutemov <[email protected]>	Wed Sep 26 11:33:07 2012 +1000
committer	Al Viro <[email protected]>	Tue Oct 02 21:35:55 2012 -0400
tree	12e075f4159e88b09a89e35866017f82f80bcc7d
parent	99621b44aa194eab594e1f17217231c02b519211 [diff]

fs: push rcu_barrier() from deactivate_locked_super() to filesystems

There's no reason to call rcu_barrier() on every
deactivate_locked_super().  We only need to make sure that all delayed rcu
free inodes are flushed before we destroy related cache.

Removing rcu_barrier() from deactivate_locked_super() affects some fast
paths.  E.g.  on my machine exit_group() of a last process in IPC
namespace takes 0.07538s.  rcu_barrier() takes 0.05188s of that time.

Signed-off-by: Kirill A. Shutemov <[email protected]>
Cc: Al Viro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Al Viro <[email protected]>

fs/9p/v9fs.c[diff]
fs/adfs/super.c[diff]
fs/affs/super.c[diff]
fs/afs/super.c[diff]
fs/befs/linuxvfs.c[diff]
fs/bfs/inode.c[diff]
fs/btrfs/extent_io.c[diff]
fs/btrfs/inode.c[diff]
fs/ceph/super.c[diff]
fs/cifs/cifsfs.c[diff]
fs/coda/inode.c[diff]
fs/ecryptfs/main.c[diff]
fs/efs/super.c[diff]
fs/exofs/super.c[diff]
fs/ext2/super.c[diff]
fs/ext3/super.c[diff]
fs/ext4/super.c[diff]
fs/fat/inode.c[diff]
fs/freevxfs/vxfs_super.c[diff]
fs/fuse/inode.c[diff]
fs/hfs/super.c[diff]
fs/hfsplus/super.c[diff]
fs/hpfs/super.c[diff]
fs/hugetlbfs/inode.c[diff]
fs/isofs/inode.c[diff]
fs/jffs2/super.c[diff]
fs/jfs/super.c[diff]
fs/logfs/inode.c[diff]
fs/minix/inode.c[diff]
fs/ncpfs/inode.c[diff]
fs/nfs/inode.c[diff]
fs/nilfs2/super.c[diff]
fs/ntfs/super.c[diff]
fs/ocfs2/dlmfs/dlmfs.c[diff]
fs/ocfs2/super.c[diff]
fs/openpromfs/inode.c[diff]
fs/qnx4/inode.c[diff]
fs/qnx6/inode.c[diff]
fs/reiserfs/super.c[diff]
fs/romfs/super.c[diff]
fs/squashfs/super.c[diff]
fs/super.c[diff]
fs/sysv/inode.c[diff]
fs/ubifs/super.c[diff]
fs/udf/super.c[diff]
fs/ufs/super.c[diff]
fs/xfs/xfs_super.c[diff]

47 files changed

tree: 12e075f4159e88b09a89e35866017f82f80bcc7d