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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>
This commit is contained in:
Stanislav Kinsbursky 2013-06-24 11:52:59 +04:00 committed by Trond Myklebust
parent e73f4cc051
commit 4f6bb246f6
1 changed files with 2 additions and 0 deletions
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2
net/sunrpc/clnt.c
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@ -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;
}