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Commit b47d19de authored by Arun Bharadwaj's avatar Arun Bharadwaj Committed by Trond Myklebust
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Pure nfs client performance using odirect. 



When an application opens a file with O_DIRECT flag, if the size of
the data that is written is equal to wsize, the client sends a
WRITE RPC with stable flag set to UNSTABLE followed by a single
COMMIT RPC rather than sending a single WRITE RPC with the stable
flag set to FILE_SYNC. This a bug.

Patch to fix this.

Signed-off-by: default avatarArun R Bharadwaj <arun@linux.vnet.ibm.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 5fc43978

fs/nfs/direct.c

+1 −1
Original line number Diff line number Diff line
@@ -867,7 +867,7 @@ static ssize_t nfs_direct_write(struct kiocb *iocb, const struct iovec *iov, 
		goto out;

	nfs_alloc_commit_data(dreq);



	if (dreq->commit_data == NULL || count < wsize)

	if (dreq->commit_data == NULL || count <= wsize)

		sync = NFS_FILE_SYNC;



	dreq->inode = inode;