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authorChuck Lever <chuck.lever@oracle.com>2008-03-14 14:14:56 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2008-03-19 18:00:34 -0400
commitecfc555a8327ff09b07066d73a98c04115007eec (patch)
tree304691e77d21b8cecfd529eddfdfb2ba3fdfac31 /fs/Kconfig
parent82d101d58a2312297ee79f96d44c1d8c7fe1032d (diff)
downloadop-kernel-dev-ecfc555a8327ff09b07066d73a98c04115007eec.zip
op-kernel-dev-ecfc555a8327ff09b07066d73a98c04115007eec.tar.gz
NFS: Always enable NFS direct I/O
Since O_DIRECT is a standard feature that is enabled in most distros, eliminate the CONFIG_NFS_DIRECTIO build option, and change the fs/nfs/Makefile to always build in the NFS direct I/O engine. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/Kconfig')
-rw-r--r--fs/Kconfig24
1 files changed, 0 insertions, 24 deletions
diff --git a/fs/Kconfig b/fs/Kconfig
index d731282..55c1a03 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -1637,30 +1637,6 @@ config NFS_V4
If unsure, say N.
-config NFS_DIRECTIO
- bool "Allow direct I/O on NFS files"
- depends on NFS_FS
- help
- This option enables applications to perform uncached I/O on files
- in NFS file systems using the O_DIRECT open() flag. When O_DIRECT
- is set for a file, its data is not cached in the system's page
- cache. Data is moved to and from user-level application buffers
- directly. Unlike local disk-based file systems, NFS O_DIRECT has
- no alignment restrictions.
-
- Unless your program is designed to use O_DIRECT properly, you are
- much better off allowing the NFS client to manage data caching for
- you. Misusing O_DIRECT can cause poor server performance or network
- storms. This kernel build option defaults OFF to avoid exposing
- system administrators unwittingly to a potentially hazardous
- feature.
-
- For more details on NFS O_DIRECT, see fs/nfs/direct.c.
-
- If unsure, say N. This reduces the size of the NFS client, and
- causes open() to return EINVAL if a file residing in NFS is
- opened with the O_DIRECT flag.
-
config NFSD
tristate "NFS server support"
depends on INET
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