LU-7734 lnet: simplify and fix lnet_select_pathway()

[fs/lustre-release.git] / lnet / lnet / api-ni.c

diff --git a/lnet/lnet/api-ni.c b/lnet/lnet/api-ni.c
index 8d318cd..aa752f8 100644 (file)
--- a/lnet/lnet/api-ni.c
+++ b/lnet/lnet/api-ni.c
@@ -69,10 +69,10 @@ MODULE_PARM_DESC(lnet_numa_range,
 
 /*
  * This sequence number keeps track of how many times DLC was used to
- * update the configuration. It is incremented on any DLC update and
- * checked when sending a message to determine if there is a need to
- * re-run the selection algorithm to handle configuration change.
- * Look at lnet_select_pathway() for more details on its usage.
+ * update the local NIs. It is incremented when a NI is added or
+ * removed and checked when sending a message to determine if there is
+ * a need to re-run the selection algorithm. See lnet_select_pathway()
+ * for more details on its usage.
  */
 static atomic_t lnet_dlc_seq_no = ATOMIC_INIT(0);
 
@@ -1292,6 +1292,7 @@ lnet_shutdown_lndni(struct lnet_ni *ni)
        lnet_net_lock(LNET_LOCK_EX);
        ni->ni_state = LNET_NI_STATE_DELETING;
        lnet_ni_unlink_locked(ni);
+       lnet_incr_dlc_seq();
        lnet_net_unlock(LNET_LOCK_EX);
 
        /* clear messages for this NI on the lazy portal */
@@ -2804,7 +2805,6 @@ LNetCtl(unsigned int cmd, void *arg)
                        return -EINVAL;
 
                mutex_lock(&the_lnet.ln_api_mutex);
-               lnet_incr_dlc_seq();
                rc = lnet_add_peer_ni_to_peer(cfg->prcfg_key_nid,
                                              cfg->prcfg_cfg_nid,
                                              cfg->prcfg_mr);
@@ -2819,7 +2819,6 @@ LNetCtl(unsigned int cmd, void *arg)
                        return -EINVAL;
 
                mutex_lock(&the_lnet.ln_api_mutex);
-               lnet_incr_dlc_seq();
                rc = lnet_del_peer_ni_from_peer(cfg->prcfg_key_nid,
                                                cfg->prcfg_cfg_nid);
                mutex_unlock(&the_lnet.ln_api_mutex);