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From: Harry van Haaren <harry.van.haaren@intel.com>
To: dev@dpdk.org
Cc: pbhagavatula@caviumnetworks.com, bruce.richardson@intel.com,
Harry van Haaren <harry.van.haaren@intel.com>
Date: Tue, 9 Jan 2018 13:37:40 +0000
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Subject: [dpdk-dev] [PATCH v4 1/2] service: fix lcore role after delete
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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")
+CC stable@dpdk.org
Reported-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
---
v4:
- Improve commit title (Bruce)
v3:
- Fix whitespace issue introduced in v2 (Doh :)
v2:
- Only update state on service core ids (Pavan)
@Stable maintainers; this is an EXPERIMENTAL tagged API, so I'm
not sure what the expectation is in terms of backporting.
---
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 372d0bb..44a988a 100644
--- a/lib/librte_eal/common/rte_service.c
+++ b/lib/librte_eal/common/rte_service.c
@@ -554,23 +554,6 @@ 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)
{
@@ -585,6 +568,25 @@ 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