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Commit 44829d02 authored by Chuck Lever's avatar Chuck Lever Committed by Anna Schumaker
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xprtrdma: Support larger inline thresholds 



The Version One default inline threshold is still 1KB. But allow
testing with thresholds up to 64KB.

This maximum is somewhat arbitrary. There's no fundamental
architectural limit I'm aware of, but it's good to keep the size of
Receive buffers reasonable. Now that Send can use a s/g list, a
Send buffer is only as large as each RPC requires. Receive buffers
are always the size of the inline threshold, however.

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
parent 655fec69

include/linux/sunrpc/xprtrdma.h

+2 −2
Original line number Diff line number Diff line
@@ -53,8 +53,8 @@ 
#define RPCRDMA_MAX_SLOT_TABLE	(256U)



#define RPCRDMA_MIN_INLINE  (1024)	/* min inline thresh */

#define RPCRDMA_DEF_INLINE  (1024)	/* default inline thresh */

#define RPCRDMA_MAX_INLINE  (3068)	/* max inline thresh */

#define RPCRDMA_DEF_INLINE  (4096)	/* default inline thresh */

#define RPCRDMA_MAX_INLINE  (65536)	/* max inline thresh */



/* Memory registration strategies, by number.

 * This is part of a kernel / user space API. Do not remove. */

net/sunrpc/xprtrdma/transport.c

+2 −2
Original line number Diff line number Diff line
@@ -97,7 +97,7 @@ static struct ctl_table xr_tunables_table[] = { 
		.data		= &xprt_rdma_max_inline_read,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler	= proc_dointvec,

		.proc_handler	= proc_dointvec_minmax,

		.extra1		= &min_inline_size,

		.extra2		= &max_inline_size,

	},
@@ -106,7 +106,7 @@ static struct ctl_table xr_tunables_table[] = { 
		.data		= &xprt_rdma_max_inline_write,

		.maxlen		= sizeof(unsigned int),

		.mode		= 0644,

		.proc_handler	= proc_dointvec,

		.proc_handler	= proc_dointvec_minmax,

		.extra1		= &min_inline_size,

		.extra2		= &max_inline_size,

	},