From 4f6bb246f69443549fbbd0f2abaf863243cb35e9 Mon Sep 17 00:00:00 2001 From: Stanislav Kinsbursky Date: Mon, 24 Jun 2013 11:52:59 +0400 Subject: [PATCH] SUNRPC: PipeFS MOUNT notification optimization for dying clients Not need to create pipes for dying client. So just skip them. Note: we can safely dereference the client structure, because notification caller is holding sn->pipefs_sb_lock. Signed-off-by: Stanislav Kinsbursky Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust --- net/sunrpc/clnt.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index b4f17117b779d..f0339ae9bf37e 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -177,6 +177,8 @@ static inline int rpc_clnt_skip_event(struct rpc_clnt *clnt, unsigned long event if (((event == RPC_PIPEFS_MOUNT) && clnt->cl_dentry) || ((event == RPC_PIPEFS_UMOUNT) && !clnt->cl_dentry)) return 1; + if ((event == RPC_PIPEFS_MOUNT) && atomic_read(&clnt->cl_count) == 0) + return 1; return 0; }