X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fldlm%2Fldlm_request.c;h=b53a85866aa86818b4b69954730d4588773b335a;hp=c322f15cc1cc677feb768572009a60c2f54f4d2a;hb=refs%2Fchanges%2F64%2F39564%2F6;hpb=1806d6e8291758a835a846cd3c593e6699e56b15

diff --git a/lustre/ldlm/ldlm_request.c b/lustre/ldlm/ldlm_request.c
index c322f15..b53a858 100644
--- a/lustre/ldlm/ldlm_request.c
+++ b/lustre/ldlm/ldlm_request.c
@@ -1418,8 +1418,9 @@ static inline struct ldlm_pool *ldlm_imp2pl(struct obd_import *imp)
  */
 int ldlm_cli_update_pool(struct ptlrpc_request *req)
 {
+	struct ldlm_namespace *ns;
 	struct obd_device *obd;
-	__u64 new_slv;
+	__u64 new_slv, ratio;
 	__u32 new_limit;
 
 	ENTRY;
@@ -1457,17 +1458,39 @@ int ldlm_cli_update_pool(struct ptlrpc_request *req)
 	read_unlock(&obd->obd_pool_lock);
 
 	/*
-	 * Set new SLV and limit in OBD fields to make them accessible
-	 * to the pool thread. We do not access obd_namespace and pool
-	 * directly here as there is no reliable way to make sure that
-	 * they are still alive at cleanup time. Evil races are possible
-	 * which may cause Oops at that time.
+	 * OBD device keeps the new pool attributes before they are handled by
+	 * the pool.
 	 */
 	write_lock(&obd->obd_pool_lock);
 	obd->obd_pool_slv = new_slv;
 	obd->obd_pool_limit = new_limit;
 	write_unlock(&obd->obd_pool_lock);
 
+	/*
+	 * Check if an urgent pool recalc is needed, let it to be a change of
+	 * SLV on 10%. It is applicable to LRU resize enabled case only.
+	 */
+	ns = obd->obd_namespace;
+	if (!ns_connect_lru_resize(ns) ||
+	    ldlm_pool_get_slv(&ns->ns_pool) < new_slv)
+		RETURN(0);
+
+	ratio = 100 * new_slv / ldlm_pool_get_slv(&ns->ns_pool);
+	if (100 - ratio >= ns->ns_recalc_pct &&
+	    !ns->ns_stopping && !ns->ns_rpc_recalc) {
+		bool recalc = false;
+
+		spin_lock(&ns->ns_lock);
+		if (!ns->ns_stopping && !ns->ns_rpc_recalc) {
+			ldlm_namespace_get(ns);
+			recalc = true;
+			ns->ns_rpc_recalc = 1;
+		}
+		spin_unlock(&ns->ns_lock);
+		if (recalc)
+			ldlm_bl_to_thread_ns(ns);
+	}
+
 	RETURN(0);
 }