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Date: Sat, 27 Nov 2010 21:15:58 +1100 From: Nick Piggin <npiggin@...nel.dk> To: linux-fsdevel@...r.kernel.org Cc: linux-kernel@...r.kernel.org Subject: [PATCH 00/46] rcu-walk and dcache scaling git://git.kernel.org/pub/scm/linux/kernel/git/npiggin/linux-npiggin.git vfs-scale-working Here is an new set of vfs patches for review, not that there was much interest last time they were posted. It is structured like: * preparation patches * introduce new locks to take over dcache_lock, then remove it * cleaning up and reworking things for new locks * rcu-walk path walking * start on some fine grained locking steps Thanks, Nick Nick Piggin (46): Revert "fs: use RCU read side protection in d_validate" fs: d_validate fixes kernel: kmem_ptr_validate considered harmful fs: dcache documentation cleanup fs: change d_delete semantics cifs: dont overwrite dentry name in d_revalidate jfs: dont overwrite dentry name in d_revalidate fs: change d_compare for rcu-walk fs: change d_hash for rcu-walk hostfs: simplify locking fs: dcache scale hash fs: dcache scale lru fs: dcache scale dentry refcount fs: dcache scale d_unhashed fs: dcache scale subdirs fs: scale inode alias list fs: Use rename lock and RCU for multi-step operations fs: increase d_name lock coverage fs: dcache remove dcache_lock fs: dcache avoid starvation in dcache multi-step operations fs: dcache reduce dput locking fs: dcache reduce locking in d_alloc fs: dcache reduce dcache_inode_lock fs: dcache rationalise dget variants fs: dcache reduce d_parent locking fs: dcache reduce prune_one_dentry locking fs: reduce dcache_inode_lock width in lru scanning fs: use RCU in shrink_dentry_list to reduce lock nesting fs: consolidate dentry kill sequence fs: icache RCU free inodes fs: avoid inode RCU freeing for pseudo fs kernel: optimise seqlock fs: rcu-walk for path lookup fs: fs_struct use seqlock fs: dcache remove d_mounted fs: dcache reduce branches in lookup path fs: cache optimise dentry and inode for rcu-walk fs: prefetch inode data in dcache lookup fs: d_revalidate_rcu for rcu-walk fs: provide rcu-walk aware permission i_ops fs: provide simple rcu-walk ACL implementation kernel: add bl_list bit_spinlock: add required includes fs: dcache per-bucket dcache hash locking fs: dcache per-inode inode alias locking fs: improve scalability of pseudo filesystems Documentation/filesystems/Locking | 23 +- Documentation/filesystems/dentry-locking.txt | 174 ---- Documentation/filesystems/path-lookup.txt | 247 ++++++ Documentation/filesystems/porting | 45 +- Documentation/filesystems/vfs.txt | 54 +- arch/ia64/kernel/perfmon.c | 4 +- arch/powerpc/platforms/cell/spufs/inode.c | 18 +- drivers/infiniband/hw/ipath/ipath_fs.c | 8 +- drivers/infiniband/hw/qib/qib_fs.c | 5 +- drivers/staging/autofs/root.c | 2 +- drivers/staging/pohmelfs/inode.c | 11 +- drivers/staging/pohmelfs/path_entry.c | 17 +- drivers/staging/smbfs/cache.c | 10 +- drivers/usb/core/inode.c | 12 +- fs/9p/vfs_dentry.c | 4 +- fs/9p/vfs_inode.c | 39 +- fs/adfs/dir.c | 13 +- fs/adfs/super.c | 11 +- fs/affs/amigaffs.c | 4 +- fs/affs/namei.c | 66 +- fs/affs/super.c | 11 +- fs/afs/dir.c | 6 +- fs/afs/super.c | 10 +- fs/anon_inodes.c | 4 +- fs/autofs4/autofs_i.h | 21 +- fs/autofs4/expire.c | 143 ++-- fs/autofs4/inode.c | 2 +- fs/autofs4/root.c | 78 +- fs/autofs4/waitq.c | 23 +- fs/befs/linuxvfs.c | 10 +- fs/bfs/inode.c | 9 +- fs/block_dev.c | 9 +- fs/btrfs/acl.c | 19 +- fs/btrfs/ctree.h | 4 +- fs/btrfs/export.c | 4 +- fs/btrfs/inode.c | 27 +- fs/ceph/dir.c | 21 +- fs/ceph/inode.c | 27 +- fs/ceph/mds_client.c | 2 +- fs/cifs/cifsfs.c | 9 +- fs/cifs/dir.c | 75 +- fs/cifs/inode.c | 14 +- fs/cifs/link.c | 4 +- fs/cifs/readdir.c | 6 +- fs/coda/cache.c | 4 +- fs/coda/dir.c | 8 +- fs/coda/inode.c | 9 +- fs/configfs/configfs_internal.h | 4 +- fs/configfs/dir.c | 13 +- fs/configfs/inode.c | 8 +- fs/dcache.c | 1224 ++++++++++++++++++-------- fs/ecryptfs/dentry.c | 15 +- fs/ecryptfs/inode.c | 8 +- fs/ecryptfs/main.c | 4 +- fs/ecryptfs/super.c | 12 +- fs/efs/super.c | 9 +- fs/exofs/super.c | 9 +- fs/exportfs/expfs.c | 14 +- fs/ext2/acl.c | 11 +- fs/ext2/acl.h | 8 +- fs/ext2/file.c | 2 +- fs/ext2/namei.c | 4 +- fs/ext2/super.c | 9 +- fs/ext3/acl.c | 11 +- fs/ext3/acl.h | 8 +- fs/ext3/file.c | 2 +- fs/ext3/namei.c | 4 +- fs/ext3/super.c | 9 +- fs/ext4/acl.c | 11 +- fs/ext4/acl.h | 4 +- fs/ext4/file.c | 2 +- fs/ext4/namei.c | 4 +- fs/ext4/super.c | 9 +- fs/fat/inode.c | 13 +- fs/fat/namei_msdos.c | 24 +- fs/fat/namei_vfat.c | 69 +- fs/filesystems.c | 3 + fs/freevxfs/vxfs_inode.c | 9 +- fs/fs_struct.c | 10 + fs/fuse/dir.c | 9 +- fs/fuse/inode.c | 13 +- fs/generic_acl.c | 20 + fs/gfs2/dentry.c | 5 +- fs/gfs2/export.c | 4 +- fs/gfs2/ops_fstype.c | 2 +- fs/gfs2/ops_inode.c | 2 +- fs/gfs2/super.c | 9 +- fs/hfs/dir.c | 2 +- fs/hfs/hfs_fs.h | 7 +- fs/hfs/string.c | 17 +- fs/hfs/super.c | 11 +- fs/hfsplus/dir.c | 2 +- fs/hfsplus/hfsplus_fs.h | 7 +- fs/hfsplus/super.c | 12 +- fs/hfsplus/unicode.c | 17 +- fs/hostfs/hostfs_kern.c | 37 +- fs/hpfs/dentry.c | 26 +- fs/hpfs/super.c | 9 +- fs/hppfs/hppfs.c | 9 +- fs/hugetlbfs/inode.c | 9 +- fs/inode.c | 16 +- fs/isofs/inode.c | 127 ++-- fs/isofs/namei.c | 5 +- fs/jffs2/super.c | 9 +- fs/jfs/namei.c | 60 +- fs/jfs/super.c | 12 +- fs/libfs.c | 63 +- fs/locks.c | 2 +- fs/logfs/inode.c | 9 +- fs/minix/inode.c | 9 +- fs/minix/namei.c | 2 +- fs/namei.c | 855 +++++++++++++++---- fs/namespace.c | 29 +- fs/ncpfs/dir.c | 66 +- fs/ncpfs/inode.c | 11 +- fs/ncpfs/ncplib_kernel.h | 16 +- fs/nfs/dir.c | 17 +- fs/nfs/getroot.c | 10 +- fs/nfs/inode.c | 9 +- fs/nfs/namespace.c | 17 +- fs/nfs/unlink.c | 2 +- fs/nfsd/vfs.c | 5 +- fs/nilfs2/super.c | 12 +- fs/notify/fsnotify.c | 8 +- fs/ntfs/inode.c | 9 +- fs/ocfs2/dcache.c | 10 +- fs/ocfs2/dlmfs/dlmfs.c | 9 +- fs/ocfs2/export.c | 4 +- fs/ocfs2/namei.c | 10 +- fs/ocfs2/super.c | 9 +- fs/openpromfs/inode.c | 9 +- fs/pipe.c | 10 +- fs/proc/base.c | 14 +- fs/proc/generic.c | 4 +- fs/proc/inode.c | 9 +- fs/proc/proc_sysctl.c | 18 +- fs/qnx4/inode.c | 9 +- fs/reiserfs/super.c | 9 +- fs/reiserfs/xattr.c | 2 +- fs/romfs/super.c | 9 +- fs/squashfs/super.c | 9 +- fs/super.c | 3 +- fs/sysfs/dir.c | 22 +- fs/sysv/inode.c | 9 +- fs/sysv/namei.c | 5 +- fs/sysv/super.c | 2 +- fs/ubifs/super.c | 10 +- fs/udf/super.c | 9 +- fs/ufs/super.c | 9 +- fs/xfs/linux-2.6/xfs_acl.c | 8 +- fs/xfs/linux-2.6/xfs_iops.c | 8 +- fs/xfs/xfs_acl.h | 4 +- fs/xfs/xfs_iget.c | 13 +- include/linux/bit_spinlock.h | 4 + include/linux/dcache.h | 183 ++-- include/linux/fs.h | 61 +- include/linux/fs_struct.h | 3 + include/linux/fsnotify.h | 2 - include/linux/fsnotify_backend.h | 11 +- include/linux/generic_acl.h | 1 + include/linux/list_bl.h | 141 +++ include/linux/namei.h | 16 +- include/linux/ncp_fs.h | 4 +- include/linux/posix_acl.h | 19 + include/linux/rculist_bl.h | 128 +++ include/linux/seqlock.h | 67 ++- include/linux/slab.h | 2 - ipc/mqueue.c | 9 +- kernel/cgroup.c | 29 +- mm/filemap.c | 3 - mm/shmem.c | 15 +- mm/slab.c | 32 +- mm/slob.c | 5 - mm/slub.c | 40 - mm/util.c | 21 - net/socket.c | 5 +- net/sunrpc/rpc_pipe.c | 14 +- security/selinux/selinuxfs.c | 16 +- security/tomoyo/realpath.c | 1 + 179 files changed, 3848 insertions(+), 1711 deletions(-) delete mode 100644 Documentation/filesystems/dentry-locking.txt create mode 100644 Documentation/filesystems/path-lookup.txt create mode 100644 include/linux/list_bl.h create mode 100644 include/linux/rculist_bl.h -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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