From: Hongchao Zhang <hongchao.zhang@intel.com>
Date: Wed, 20 Jul 2016 00:31:39 +0000 (+0800)
Subject: LU-8209 ldlm: engage ELC for all ldlm enqueue req
X-Git-Tag: 2.8.60~72
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=refs%2Fchanges%2F39%2F21739%2F6;p=fs%2Flustre-release.git

LU-8209 ldlm: engage ELC for all ldlm enqueue req

If there is no request passed into ldlm_cli_enqueue, the enqueue
request will not engage ELC to drop unneeded locks. currently,
this kind of request is mainly related to EXTENT locks enqueue
requests (except for glimpse EXTENT lock for it has an intent).

Change-Id: Ibb34117cbec6764f643457d9b0af142393263608
Signed-off-by: Hongchao Zhang <hongchao.zhang@intel.com>
Reviewed-on: http://review.whamcloud.com/21739
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Vitaly Fertman <vitaly.fertman@seagate.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
---

diff --git a/lustre/ldlm/ldlm_request.c b/lustre/ldlm/ldlm_request.c
index 8e34498..ac78b17 100644
--- a/lustre/ldlm/ldlm_request.c
+++ b/lustre/ldlm/ldlm_request.c
@@ -954,74 +954,61 @@ int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
 	lock->l_flags |= (*flags & (LDLM_FL_NO_LRU | LDLM_FL_EXCL));
         lock->l_last_activity = cfs_time_current_sec();
 
-        /* lock not sent to server yet */
-
-        if (reqp == NULL || *reqp == NULL) {
-                req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
-                                                &RQF_LDLM_ENQUEUE,
-                                                LUSTRE_DLM_VERSION,
-                                                LDLM_ENQUEUE);
-                if (req == NULL) {
-                        failed_lock_cleanup(ns, lock, einfo->ei_mode);
-                        LDLM_LOCK_RELEASE(lock);
-                        RETURN(-ENOMEM);
-                }
-                req_passed_in = 0;
-                if (reqp)
-                        *reqp = req;
-        } else {
-                int len;
+	/* lock not sent to server yet */
+	if (reqp == NULL || *reqp == NULL) {
+		req = ldlm_enqueue_pack(exp, lvb_len);
+		if (IS_ERR(req)) {
+			failed_lock_cleanup(ns, lock, einfo->ei_mode);
+			LDLM_LOCK_RELEASE(lock);
+			RETURN(PTR_ERR(req));
+		}
 
-                req = *reqp;
-                len = req_capsule_get_size(&req->rq_pill, &RMF_DLM_REQ,
-                                           RCL_CLIENT);
-                LASSERTF(len >= sizeof(*body), "buflen[%d] = %d, not %d\n",
-                         DLM_LOCKREQ_OFF, len, (int)sizeof(*body));
-        }
+		req_passed_in = 0;
+		if (reqp)
+			*reqp = req;
+	} else {
+		int len;
 
-        /* Dump lock data into the request buffer */
-        body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
-        ldlm_lock2desc(lock, &body->lock_desc);
+		req = *reqp;
+		len = req_capsule_get_size(&req->rq_pill, &RMF_DLM_REQ,
+					   RCL_CLIENT);
+		LASSERTF(len >= sizeof(*body), "buflen[%d] = %d, not %d\n",
+			 DLM_LOCKREQ_OFF, len, (int)sizeof(*body));
+	}
+
+	/* Dump lock data into the request buffer */
+	body = req_capsule_client_get(&req->rq_pill, &RMF_DLM_REQ);
+	ldlm_lock2desc(lock, &body->lock_desc);
 	body->lock_flags = ldlm_flags_to_wire(*flags);
-        body->lock_handle[0] = *lockh;
-
-        /* Continue as normal. */
-        if (!req_passed_in) {
-		if (lvb_len > 0)
-			req_capsule_extend(&req->rq_pill,
-					   &RQF_LDLM_ENQUEUE_LVB);
-		req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
-				     lvb_len);
-		ptlrpc_request_set_replen(req);
-        }
+	body->lock_handle[0] = *lockh;
 
-        if (async) {
-                LASSERT(reqp != NULL);
-                RETURN(0);
-        }
+	if (async) {
+		LASSERT(reqp != NULL);
+		RETURN(0);
+	}
 
-        LDLM_DEBUG(lock, "sending request");
+	LDLM_DEBUG(lock, "sending request");
 
-        rc = ptlrpc_queue_wait(req);
+	rc = ptlrpc_queue_wait(req);
 
-        err = ldlm_cli_enqueue_fini(exp, req, einfo->ei_type, policy ? 1 : 0,
-                                    einfo->ei_mode, flags, lvb, lvb_len,
-                                    lockh, rc);
+	err = ldlm_cli_enqueue_fini(exp, req, einfo->ei_type, policy ? 1 : 0,
+				    einfo->ei_mode, flags, lvb, lvb_len,
+				    lockh, rc);
 
-        /* If ldlm_cli_enqueue_fini did not find the lock, we need to free
-         * one reference that we took */
-        if (err == -ENOLCK)
-                LDLM_LOCK_RELEASE(lock);
-        else
-                rc = err;
+	/* If ldlm_cli_enqueue_fini did not find the lock, we need to free
+	 * one reference that we took */
+	if (err == -ENOLCK)
+		LDLM_LOCK_RELEASE(lock);
+	else
+		rc = err;
 
-        if (!req_passed_in && req != NULL) {
-                ptlrpc_req_finished(req);
-                if (reqp)
-                        *reqp = NULL;
-        }
+	if (!req_passed_in && req != NULL) {
+		ptlrpc_req_finished(req);
+		if (reqp)
+			*reqp = NULL;
+	}
 
-        RETURN(rc);
+	RETURN(rc);
 }
 EXPORT_SYMBOL(ldlm_cli_enqueue);