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| author | Chuck Lever <chuck.lever@oracle.com> | 2008-03-14 14:14:56 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-03-19 18:00:34 -0400 |
| commit | ecfc555a8327ff09b07066d73a98c04115007eec (patch) | |
| tree | 304691e77d21b8cecfd529eddfdfb2ba3fdfac31 /fs/Kconfig | |
| parent | 82d101d58a2312297ee79f96d44c1d8c7fe1032d (diff) | |
| download | blackbird-op-linux-ecfc555a8327ff09b07066d73a98c04115007eec.tar.gz blackbird-op-linux-ecfc555a8327ff09b07066d73a98c04115007eec.zip | |
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/Kconfig | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/fs/Kconfig b/fs/Kconfig index d7312825592b..55c1a0374e13 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 |
