From: Oleksandr Kolomeiets <okl-plv@napatech.com>
To: dev@dpdk.org
Cc: mko-plv@napatech.com, sil-plv@napatech.com, ckm@napatech.com,
stephen@networkplumber.org, thomas@monjalon.net,
Danylo Vodopianov <dvo-plv@napatech.com>
Subject: [PATCH v2 25/26] net/ntnic: avoid possible deadlock
Date: Mon, 5 May 2025 09:13:05 +0200 [thread overview]
Message-ID: <20250505071309.586015-26-okl-plv@napatech.com> (raw)
In-Reply-To: <20250505071309.586015-1-okl-plv@napatech.com>
From: Danylo Vodopianov <dvo-plv@napatech.com>
Sometimes during high flow learn performance two threads
could cause deadlock using queue and mutex.
learn_ignored variable sets when flow learn and gets
when flow removes. Hence, learn_ignore should not be protected
as far as two thread could not access to the same flow
at the same time.
Signed-off-by: Danylo Vodopianov <dvo-plv@napatech.com>
Signed-off-by: Oleksandr Kolomeiets <okl-plv@napatech.com>
---
drivers/net/ntnic/include/flow_api_engine.h | 2 +-
.../nthw/flow_api/profile_inline/flow_api_profile_inline.c | 7 +++----
2 files changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ntnic/include/flow_api_engine.h b/drivers/net/ntnic/include/flow_api_engine.h
index 859c76656a..6401c79e3c 100644
--- a/drivers/net/ntnic/include/flow_api_engine.h
+++ b/drivers/net/ntnic/include/flow_api_engine.h
@@ -297,7 +297,7 @@ struct flow_handle {
enum flow_handle_type type;
uint32_t flm_id;
uint16_t caller_id;
- uint16_t learn_ignored;
+ RTE_ATOMIC(uint16_t) learn_ignored;
struct flow_eth_dev *dev;
struct flow_handle *next;
diff --git a/drivers/net/ntnic/nthw/flow_api/profile_inline/flow_api_profile_inline.c b/drivers/net/ntnic/nthw/flow_api/profile_inline/flow_api_profile_inline.c
index 3133464675..cb6a66a061 100644
--- a/drivers/net/ntnic/nthw/flow_api/profile_inline/flow_api_profile_inline.c
+++ b/drivers/net/ntnic/nthw/flow_api/profile_inline/flow_api_profile_inline.c
@@ -518,9 +518,8 @@ static void flm_mtr_read_sta_records(struct flow_eth_dev *dev, uint32_t *data, u
uint8_t port;
bool remote_caller = is_remote_caller(caller_id, &port);
- rte_spinlock_lock(&dev->ndev->mtx);
- ((struct flow_handle *)flm_h.p)->learn_ignored = 1;
- rte_spinlock_unlock(&dev->ndev->mtx);
+ rte_atomic_store_explicit(&((struct flow_handle *)flm_h.p)->learn_ignored,
+ 1, rte_memory_order_seq_cst);
struct flm_status_event_s data = {
.flow = flm_h.p,
.learn_ignore = sta_data->lis,
@@ -972,7 +971,7 @@ static int flm_flow_programming(struct flow_handle *fh, uint32_t flm_op)
if (flm_op == NT_FLM_OP_UNLEARN) {
ntnic_id_table_free_id(fh->dev->ndev->id_table_handle, flm_id);
- if (fh->learn_ignored == 1)
+ if (rte_atomic_load_explicit(&fh->learn_ignored, rte_memory_order_seq_cst) == 1)
return 0;
}
--
2.47.1
next prev parent reply other threads:[~2025-05-05 7:15 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-05 7:12 [PATCH v2 00/26] net/ntnic: fixes and improvements Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 01/26] net/ntnic: remove usage of the variable-length arrays Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 02/26] net/ntnic: handle string truncations when using strlcpy Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 03/26] net/ntnic: replace pragma pack with DPDK defined macros Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 04/26] net/ntnic: remove extra memset Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 05/26] net/ntnic: include all queues into statistics Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 06/26] net/ntnic: avoid misleading variable names Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 07/26] net/ntnic: apply packing to the structure Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 08/26] net/ntnic: correct misspelled variable names Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 09/26] net/ntnic: improve logging format specifiers Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 10/26] net/ntnic: remove usless expressions Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 11/26] net/ntnic: remove unused code Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 12/26] net/ntnic: remove usless part of conditional expression Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 13/26] net/ntnic: add error logging for hsh Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 14/26] net/ntnic: add explicitly specificator Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 15/26] net/ntnic: add handle memory allocation failures Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 16/26] net/ntnic: remove redundant initialization Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 17/26] net/ntnic: enhance null checks and assertions Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 18/26] net/ntnic: add return value check Oleksandr Kolomeiets
2025-05-05 7:12 ` [PATCH v2 19/26] net/ntnic: remove redundant assignments and branching Oleksandr Kolomeiets
2025-05-05 7:13 ` [PATCH v2 20/26] net/ntnic: rework array usage Oleksandr Kolomeiets
2025-05-05 7:13 ` [PATCH v2 21/26] net/ntnic: avoid divide by zero Oleksandr Kolomeiets
2025-05-05 7:13 ` [PATCH v2 22/26] net/ntnic: remove unnecessary void cast Oleksandr Kolomeiets
2025-05-05 7:13 ` [PATCH v2 23/26] net/ntnic: remove unnecessary memset Oleksandr Kolomeiets
2025-05-05 7:13 ` [PATCH v2 24/26] net/ntnic: add null verification Oleksandr Kolomeiets
2025-05-05 7:13 ` Oleksandr Kolomeiets [this message]
2025-05-05 7:13 ` [PATCH v2 26/26] net/ntnic: fix operation with rte ring queue Oleksandr Kolomeiets
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