[dpdk-stable] patch 'service: fix lcore role after delete' has been queued to LTS release 17.11.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to LTS release 17.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 01/26/18. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From 7a393b2d5812120d1e85e6aa48cd004f8be1f2f2 Mon Sep 17 00:00:00 2001
From: Harry van Haaren <harry.van.haaren at intel.com>
Date: Tue, 9 Jan 2018 13:37:40 +0000
Subject: [PATCH] service: fix lcore role after delete

[ upstream commit 54e7456a3bfdf2d7fe651ec25e951fe4b44be569 ]

This patch fixes the reset of the service core,
that when rte_service_lcore_del() is called, the
lcore_role is restored to RTE.

This issue was reported as when running the unit tests, an
error was thrown that "failed to allocate lcore". Investigating
revealed that the state of the service-cores after del() was
not allowing a core to be re-used at a later point in time.

Fixes: 21698354c832 ("service: introduce service cores concept")

Reported-by: Pavan Nikhilesh <pbhagavatula at caviumnetworks.com>
Signed-off-by: Harry van Haaren <harry.van.haaren at intel.com>
Acked-by: Pavan Nikhilesh <pbhagavatula at caviumnetworks.com>
---
 lib/librte_eal/common/rte_service.c | 36 +++++++++++++++++++-----------------
 1 file changed, 19 insertions(+), 17 deletions(-)

diff --git a/lib/librte_eal/common/rte_service.c b/lib/librte_eal/common/rte_service.c
index 2630770..9ff4136 100644
--- a/lib/librte_eal/common/rte_service.c
+++ b/lib/librte_eal/common/rte_service.c
@@ -587,23 +587,6 @@ rte_service_map_lcore_get(uint32_t id, uint32_t lcore)
 	return ret;
 }
 
-int32_t rte_service_lcore_reset_all(void)
-{
-	/* loop over cores, reset all to mask 0 */
-	uint32_t i;
-	for (i = 0; i < RTE_MAX_LCORE; i++) {
-		lcore_states[i].service_mask = 0;
-		lcore_states[i].is_service_core = 0;
-		lcore_states[i].runstate = RUNSTATE_STOPPED;
-	}
-	for (i = 0; i < RTE_SERVICE_NUM_MAX; i++)
-		rte_atomic32_set(&rte_services[i].num_mapped_cores, 0);
-
-	rte_smp_wmb();
-
-	return 0;
-}
-
 static void
 set_lcore_state(uint32_t lcore, int32_t state)
 {
@@ -618,6 +601,25 @@ set_lcore_state(uint32_t lcore, int32_t state)
 	lcore_states[lcore].is_service_core = (state == ROLE_SERVICE);
 }
 
+int32_t rte_service_lcore_reset_all(void)
+{
+	/* loop over cores, reset all to mask 0 */
+	uint32_t i;
+	for (i = 0; i < RTE_MAX_LCORE; i++) {
+		if (lcore_states[i].is_service_core) {
+			lcore_states[i].service_mask = 0;
+			set_lcore_state(i, ROLE_RTE);
+			lcore_states[i].runstate = RUNSTATE_STOPPED;
+		}
+	}
+	for (i = 0; i < RTE_SERVICE_NUM_MAX; i++)
+		rte_atomic32_set(&rte_services[i].num_mapped_cores, 0);
+
+	rte_smp_wmb();
+
+	return 0;
+}
+
 int32_t
 rte_service_lcore_add(uint32_t lcore)
 {
-- 
2.7.4