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From:   Olga Kornievskaia <olga.kornievskaia@gmail.com>
To:     trond.myklebust@hammerspace.com, anna.schumaker@netapp.com,
        chuck.level@oracle.com
Cc:     linux-nfs@vger.kernel.org
Subject: [RFC 2/2] xprtrdma: remove re_implicit_roundup xprt_rdma_pad_optimize
Date:   Mon, 30 Aug 2021 12:53:02 -0400
Message-Id: <20210830165302.60225-3-olga.kornievskaia@gmail.com>
In-Reply-To: <20210830165302.60225-1-olga.kornievskaia@gmail.com>
References: <20210830165302.60225-1-olga.kornievskaia@gmail.com>
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From: Olga Kornievskaia <kolga@netapp.com>

Since RPC over RDMA layer no longer needs to manage XDR padding,
remove existing code that managed whether or not client included
extra space for the XDR padding.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
---
 net/sunrpc/xprtrdma/transport.c | 8 --------
 net/sunrpc/xprtrdma/verbs.c     | 2 --
 net/sunrpc/xprtrdma/xprt_rdma.h | 6 ------
 3 files changed, 16 deletions(-)

diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c
index 16e5696314a4..e7b9d88f4483 100644
--- a/net/sunrpc/xprtrdma/transport.c
+++ b/net/sunrpc/xprtrdma/transport.c
@@ -72,7 +72,6 @@ static unsigned int xprt_rdma_slot_table_entries = RPCRDMA_DEF_SLOT_TABLE;
 unsigned int xprt_rdma_max_inline_read = RPCRDMA_DEF_INLINE;
 unsigned int xprt_rdma_max_inline_write = RPCRDMA_DEF_INLINE;
 unsigned int xprt_rdma_memreg_strategy		= RPCRDMA_FRWR;
-int xprt_rdma_pad_optimize;
 static struct xprt_class xprt_rdma;
 
 #if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
@@ -134,13 +133,6 @@ static struct ctl_table xr_tunables_table[] = {
 		.extra1		= &min_memreg,
 		.extra2		= &max_memreg,
 	},
-	{
-		.procname	= "rdma_pad_optimize",
-		.data		= &xprt_rdma_pad_optimize,
-		.maxlen		= sizeof(unsigned int),
-		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
-	},
 	{ },
 };
 
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index aaec3c9be8db..d8650a3563ef 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -205,14 +205,12 @@ static void rpcrdma_update_cm_private(struct rpcrdma_ep *ep,
 	unsigned int rsize, wsize;
 
 	/* Default settings for RPC-over-RDMA Version One */
-	ep->re_implicit_roundup = xprt_rdma_pad_optimize;
 	rsize = RPCRDMA_V1_DEF_INLINE_SIZE;
 	wsize = RPCRDMA_V1_DEF_INLINE_SIZE;
 
 	if (pmsg &&
 	    pmsg->cp_magic == rpcrdma_cmp_magic &&
 	    pmsg->cp_version == RPCRDMA_CMP_VERSION) {
-		ep->re_implicit_roundup = true;
 		rsize = rpcrdma_decode_buffer_size(pmsg->cp_send_size);
 		wsize = rpcrdma_decode_buffer_size(pmsg->cp_recv_size);
 	}
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index d91f54eae00b..137866a83a3a 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -74,7 +74,6 @@ struct rpcrdma_ep {
 	struct ib_pd		*re_pd;
 	unsigned int		re_max_rdma_segs;
 	unsigned int		re_max_fr_depth;
-	bool			re_implicit_roundup;
 	enum ib_mr_type		re_mrtype;
 	struct completion	re_done;
 	unsigned int		re_send_count;
@@ -441,11 +440,6 @@ rpcrdma_portstr(const struct rpcrdma_xprt *r_xprt)
 	return r_xprt->rx_xprt.address_strings[RPC_DISPLAY_PORT];
 }
 
-/* Setting this to 0 ensures interoperability with early servers.
- * Setting this to 1 enhances certain unaligned read/write performance.
- * Default is 0, see sysctl entry and rpc_rdma.c rpcrdma_convert_iovs() */
-extern int xprt_rdma_pad_optimize;
-
 /* This setting controls the hunt for a supported memory
  * registration strategy.
  */
-- 
2.27.0