[dpdk-dev,v3,1/2] service: fix del to reset lcore role to rte
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Commit Message
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>
---
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(-)
Comments
On Tue, Jan 09, 2018 at 11:38:04AM +0000, Harry van Haaren wrote:
> This patch fixes the reset of the service core,
> that when rte_service_lcore_del() is called, the
> lcore_role is restored to RTE.
>
Title seems awkward, how about "fix lcore role after delete"?
@@ -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)
{