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authorStanislav Kinsbursky <skinsbursky@parallels.com>2013-06-24 11:52:59 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-06-28 23:42:26 +0400
commit4f6bb246f69443549fbbd0f2abaf863243cb35e9 (patch)
tree6a4608ffba8d5489d0b9dbc35840d33917840199 /net/sunrpc/clnt.c
parente73f4cc051199799aee4320f300f28ffb82f3eb1 (diff)
downloadlinux-4f6bb246f69443549fbbd0f2abaf863243cb35e9.tar.xz
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 <skinsbursky@parallels.com> Cc: stable@vger.kernel.org Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/clnt.c')
-rw-r--r--net/sunrpc/clnt.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index b4f17117b779..f0339ae9bf37 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;
}