NFSv4.1: Ensure smooth handover of slots from one task to the next waiting

Currently, we see a lot of bouncing for the value of highest_used_slotid
due to the fact that slots are getting freed, instead of getting instantly
transmitted to the next waiting task.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 1 insertions, 5 deletions

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 7d73df5a05d1..78e90a80fc3a 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -255,17 +255,13 @@ static void nfs4_end_drain_session(struct nfs_client *clp)
 {
         struct nfs4_session *ses = clp->cl_session;
         struct nfs4_slot_table *tbl;
-        unsigned int i;
 
         if (ses == NULL)
                 return;
         tbl = &ses->fc_slot_table;
         if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
                 spin_lock(&tbl->slot_tbl_lock);
-                for (i = 0; i <= tbl->max_slotid; i++) {
-                        if (rpc_wake_up_next(&tbl->slot_tbl_waitq) == NULL)
-                                break;
-                }
+                nfs41_wake_slot_table(tbl);
                 spin_unlock(&tbl->slot_tbl_lock);
         }
 }