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SUNRPC: switchable buffer allocation

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Add RPC client transport switch support for replacing buffer management
 on a per-transport basis.

 In the current IPv4 socket transport implementation, RPC buffers are
 allocated as needed for each RPC message that is sent.  Some transport
 implementations may choose to use pre-allocated buffers for encoding,
 sending, receiving, and unmarshalling RPC messages, however.  For
 transports capable of direct data placement, the buffers can be carved
 out of a pre-registered area of memory rather than from a slab cache.

 Test-plan:
 Millions of fsx operations.  Performance characterization with "sio" and
 "iozone".  Use oprofile and other tools to look for significant regression
 in CPU utilization.

 Signed-off-by: Chuck Lever <cel@netapp.com>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever
2006-01-03 09:55:49 +01:00
committed by Trond Myklebust
parent 03c2173393
commit 0210714834
6 changed files with 49 additions and 36 deletions
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3
include/linux/sunrpc/sched.h
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@@ -52,8 +52,6 @@ struct rpc_task {
* RPC call state
*/
struct rpc_message tk_msg; /* RPC call info */
__u32 * tk_buffer; /* XDR buffer */
size_t tk_bufsize;
__u8 tk_garb_retry;
__u8 tk_cred_retry;
@@ -268,6 +266,7 @@ struct rpc_task *rpc_wake_up_next(struct rpc_wait_queue *);
void rpc_wake_up_status(struct rpc_wait_queue *, int);
void rpc_delay(struct rpc_task *, unsigned long);
void * rpc_malloc(struct rpc_task *, size_t);
void rpc_free(struct rpc_task *);
int rpciod_up(void);
void rpciod_down(void);
void rpciod_wake_up(void);