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Commit 1c6c4b74 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFS: Remove private spinlock in struct nfs_pgio_header 



Now that each struct nfs_pgio_header corresponds to one RPC call, we
only have one writer to the struct nfs_pgio_header.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 28d52235

fs/nfs/pagelist.c

+6 −7
Original line number Diff line number Diff line
@@ -63,14 +63,14 @@ EXPORT_SYMBOL_GPL(nfs_pgheader_init); 


void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos)

{

	spin_lock(&hdr->lock);

	if (!test_and_set_bit(NFS_IOHDR_ERROR, &hdr->flags)

	    || pos < hdr->io_start + hdr->good_bytes) {

	unsigned int new = pos - hdr->io_start;



	if (hdr->good_bytes > new) {

		hdr->good_bytes = new;

		clear_bit(NFS_IOHDR_EOF, &hdr->flags);

		hdr->good_bytes = pos - hdr->io_start;

		if (!test_and_set_bit(NFS_IOHDR_ERROR, &hdr->flags))

			hdr->error = error;

	}

	spin_unlock(&hdr->lock);

}



static inline struct nfs_page *
@@ -494,7 +494,6 @@ struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *ops) 


	if (hdr) {

		INIT_LIST_HEAD(&hdr->pages);

		spin_lock_init(&hdr->lock);

		hdr->rw_ops = ops;

	}

	return hdr;

fs/nfs/read.c

+4 −6
Original line number Diff line number Diff line
@@ -276,16 +276,14 @@ static void nfs_readpage_result(struct rpc_task *task, 
				struct nfs_pgio_header *hdr)

{

	if (hdr->res.eof) {

		loff_t bound;

		loff_t pos = hdr->args.offset + hdr->res.count;

		unsigned int new = pos - hdr->io_start;



		bound = hdr->args.offset + hdr->res.count;

		spin_lock(&hdr->lock);

		if (bound < hdr->io_start + hdr->good_bytes) {

		if (hdr->good_bytes > new) {

			hdr->good_bytes = new;

			set_bit(NFS_IOHDR_EOF, &hdr->flags);

			clear_bit(NFS_IOHDR_ERROR, &hdr->flags);

			hdr->good_bytes = bound - hdr->io_start;

		}

		spin_unlock(&hdr->lock);

	} else if (hdr->res.count < hdr->args.count)

		nfs_readpage_retry(task, hdr);

}

include/linux/nfs_xdr.h

+2 −3
Original line number Diff line number Diff line
@@ -1482,11 +1482,10 @@ struct nfs_pgio_header { 
	const struct nfs_rw_ops	*rw_ops;

	struct nfs_io_completion *io_completion;

	struct nfs_direct_req	*dreq;

	spinlock_t		lock;

	/* fields protected by lock */



	int			pnfs_error;

	int			error;		/* merge with pnfs_error */

	unsigned long		good_bytes;	/* boundary of good data */

	unsigned int		good_bytes;	/* boundary of good data */

	unsigned long		flags;



	/*