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authorChuck Lever <chuck.lever@oracle.com>2009-12-03 21:58:56 +0100
committerTrond Myklebust <Trond.Myklebust@netapp.com>2009-12-03 21:58:56 +0100
commitc526611dd631b2802b6b0221ffb306c5fa25c86c (patch)
tree909f241683fbe848b484cef24a77d716c486d25c /net/sunrpc/sunrpc_syms.c
parentSUNRPC: Simplify synopsis of rpcb_local_clnt() (diff)
downloadlinux-c526611dd631b2802b6b0221ffb306c5fa25c86c.tar.xz
linux-c526611dd631b2802b6b0221ffb306c5fa25c86c.zip
SUNRPC: Use a cached RPC client and transport for rpcbind upcalls
The kernel's rpcbind client creates and deletes an rpc_clnt and its underlying transport socket for every upcall to the local rpcbind daemon. When starting a typical NFS server on IPv4 and IPv6, the NFS service itself does three upcalls (one per version) times two upcalls (one per transport) times two upcalls (one per address family), making 12, plus another one for the initial call to unregister previous NFS services. Starting the NLM service adds an additional 13 upcalls, for similar reasons. (Currently the NFS service doesn't start IPv6 listeners, but it will soon enough). Instead, let's create an rpc_clnt for rpcbind upcalls during the first local rpcbind query, and cache it. This saves the overhead of creating and destroying an rpc_clnt and a socket for every upcall. The new logic also prevents the kernel from attempting an RPCB_SET or RPCB_UNSET if it knows from the start that the local portmapper does not support rpcbind protocol version 4. This will cut down on the number of rpcbind upcalls in legacy environments. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'net/sunrpc/sunrpc_syms.c')
-rw-r--r--net/sunrpc/sunrpc_syms.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index 8cce92189019..f438347d817b 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -24,6 +24,8 @@
extern struct cache_detail ip_map_cache, unix_gid_cache;
+extern void cleanup_rpcb_clnt(void);
+
static int __init
init_sunrpc(void)
{
@@ -53,6 +55,7 @@ out:
static void __exit
cleanup_sunrpc(void)
{
+ cleanup_rpcb_clnt();
rpcauth_remove_module();
cleanup_socket_xprt();
svc_cleanup_xprt_sock();