diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2007-03-29 16:47:53 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-04-30 22:17:10 -0700 |
| commit | 2bea90d43a050bbc4021d44e59beb34f384438db (patch) | |
| tree | 2dd3f15bd9df537166a82777b0c95243b90b17e1 /include/linux/sunrpc/xprt.h | |
| parent | 511d2e8855a065c8251d0c140ebc353854f1929e (diff) | |
SUNRPC: RPC buffer size estimates are too large
The RPC buffer size estimation logic in net/sunrpc/clnt.c always
significantly overestimates the requirements for the buffer size.
A little instrumentation demonstrated that in fact rpc_malloc was never
allocating the buffer from the mempool, but almost always called kmalloc.
To compute the size of the RPC buffer more precisely, split p_bufsiz into
two fields; one for the argument size, and one for the result size.
Then, compute the sum of the exact call and reply header sizes, and split
the RPC buffer precisely between the two. That should keep almost all RPC
buffers within the 2KiB buffer mempool limit.
And, we can finally be rid of RPC_SLACK_SPACE!
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'include/linux/sunrpc/xprt.h')
| -rw-r--r-- | include/linux/sunrpc/xprt.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index f780e72fc41..7aa29502b18 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -84,7 +84,9 @@ struct rpc_rqst { struct list_head rq_list; __u32 * rq_buffer; /* XDR encode buffer */ - size_t rq_bufsize; + size_t rq_bufsize, + rq_callsize, + rq_rcvsize; struct xdr_buf rq_private_buf; /* The receive buffer * used in the softirq. |