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Commit 91e59c36 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFS: Don't wait for congestion in nfs_update_request() 



It is redundant, and will interfere with the call to
balance_dirty_pages_ratelimited_nr in generic_file_write().

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 1a0ba9ae

fs/nfs/write.c

+0 −30
Original line number Diff line number Diff line
@@ -594,34 +594,6 @@ static inline int nfs_scan_commit(struct inode *inode, struct list_head *dst, un 
}

#endif



static int nfs_wait_on_write_congestion(struct address_space *mapping)

{

	struct inode *inode = mapping->host;

	struct backing_dev_info *bdi = mapping->backing_dev_info;

	int ret = 0;



	might_sleep();



	if (!bdi_write_congested(bdi))

		return 0;



	nfs_inc_stats(inode, NFSIOS_CONGESTIONWAIT);



	do {

		struct rpc_clnt *clnt = NFS_CLIENT(inode);

		sigset_t oldset;



		rpc_clnt_sigmask(clnt, &oldset);

		ret = congestion_wait_interruptible(WRITE, HZ/10);

		rpc_clnt_sigunmask(clnt, &oldset);

		if (ret == -ERESTARTSYS)

			break;

		ret = 0;

	} while (bdi_write_congested(bdi));



	return ret;

}



/*

 * Try to update any existing write request, or create one if there is none.

 * In order to match, the request's credentials must match those of
@@ -640,8 +612,6 @@ static struct nfs_page * nfs_update_request(struct nfs_open_context* ctx, 


	end = offset + bytes;



	if (nfs_wait_on_write_congestion(mapping))

		return ERR_PTR(-ERESTARTSYS);

	for (;;) {

		/* Loop over all inode entries and see if we find

		 * A request for the page we wish to update