nfsd4: lookup up callback cred only once

[safe/jmp/linux-2.6] / fs / Kconfig

diff --git a/fs/Kconfig b/fs/Kconfig
index 86b203f..9f7270f 100644 (file)
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -175,9 +175,34 @@ source "fs/qnx4/Kconfig"
 source "fs/romfs/Kconfig"
 source "fs/sysv/Kconfig"
 source "fs/ufs/Kconfig"
-
 source "fs/exofs/Kconfig"
 
+config NILFS2_FS
+       tristate "NILFS2 file system support (EXPERIMENTAL)"
+       depends on BLOCK && EXPERIMENTAL
+       select CRC32
+       help
+         NILFS2 is a log-structured file system (LFS) supporting continuous
+         snapshotting.  In addition to versioning capability of the entire
+         file system, users can even restore files mistakenly overwritten or
+         destroyed just a few seconds ago.  Since this file system can keep
+         consistency like conventional LFS, it achieves quick recovery after
+         system crashes.
+
+         NILFS2 creates a number of checkpoints every few seconds or per
+         synchronous write basis (unless there is no change).  Users can
+         select significant versions among continuously created checkpoints,
+         and can change them into snapshots which will be preserved for long
+         periods until they are changed back to checkpoints.  Each
+         snapshot is mountable as a read-only file system concurrently with
+         its writable mount, and this feature is convenient for online backup.
+
+         Some features including atime, extended attributes, and POSIX ACLs,
+         are not supported yet.
+
+         To compile this file system support as a module, choose M here: the
+         module will be called nilfs2.  If unsure, say N.
+
 endif # MISC_FILESYSTEMS
 
 menuconfig NETWORK_FILESYSTEMS