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authorChuck Lever <chuck.lever@oracle.com>2010-02-01 14:17:50 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-02-10 08:31:05 -0500
commitf895c53f8ace3c3e49ebf9def90e63fc6d46d2bf (patch)
tree93a6c17949a0e0bf194127be7cd0fa2a3bdd300f /fs
parent7e381172cf6e0282a56374e50667515aed55166a (diff)
downloadop-kernel-dev-f895c53f8ace3c3e49ebf9def90e63fc6d46d2bf.zip
op-kernel-dev-f895c53f8ace3c3e49ebf9def90e63fc6d46d2bf.tar.gz
NFS: Make close(2) asynchronous when closing NFS O_DIRECT files
For NFSv2 and v3: O_DIRECT writes are always synchronous, and aren't cached, so nothing should be flushed when closing an NFS O_DIRECT file descriptor. Thus there are no write errors to report on close(2). In addition, there's no cached data to verify on the next open(2), so we don't need clean GETATTR results at close time to compare with. Thus, there's no need for the nfs_revalidate_inode() call when closing an NFS O_DIRECT file. This reduces the number of synchronous on-the-wire requests for a simple open-write-close of an NFS O_DIRECT file by roughly 20%. For NFSv4: Call nfs4_do_close() with wait set to zero when closing an NFS O_DIRECT file. The CLOSE will go on the wire, but the application won't wait for it to complete. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/inode.c7
1 files changed, 1 insertions, 6 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index f141bde..87cca56 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -620,11 +620,6 @@ void put_nfs_open_context(struct nfs_open_context *ctx)
__put_nfs_open_context(ctx, 0);
}
-static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
-{
- __put_nfs_open_context(ctx, 1);
-}
-
/*
* Ensure that mmap has a recent RPC credential for use when writing out
* shared pages
@@ -671,7 +666,7 @@ static void nfs_file_clear_open_context(struct file *filp)
spin_lock(&inode->i_lock);
list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
spin_unlock(&inode->i_lock);
- put_nfs_open_context_sync(ctx);
+ __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
}
}
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