[1/4] hash: correct key store element alignment

Message ID 1536253938-192391-2-git-send-email-honnappa.nagarahalli@arm.com
State Superseded
Headers show
Series
  • Address reader-writer concurrency in rte_hash
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Commit Message

Honnappa Nagarahalli Sept. 6, 2018, 5:12 p.m.
Correct the key store array element alignment. This is required to
make 'pdata' in 'struct rte_hash_key' align on the correct boundary.

Signed-off-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>

Reviewed-by: Gavin Hu <gavin.hu@arm.com>

Reviewed-by: Ola Liljedahl <ola.liljedahl@arm.com>

Reviewed-by: Steve Capper <steve.capper@arm.com>

---
 lib/librte_hash/rte_cuckoo_hash.c | 4 +++-
 lib/librte_hash/rte_cuckoo_hash.h | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

-- 
2.7.4

Comments

Wang, Yipeng1 Sept. 27, 2018, 11:58 p.m. | #1
>-----Original Message-----

>From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Honnappa Nagarahalli

>Sent: Thursday, September 6, 2018 10:12 AM

>To: Richardson, Bruce <bruce.richardson@intel.com>; De Lara Guarch, Pablo <pablo.de.lara.guarch@intel.com>

>Cc: dev@dpdk.org; honnappa.nagarahalli@dpdk.org; gavin.hu@arm.com; steve.capper@arm.com; ola.liljedahl@arm.com;

>nd@arm.com; Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>

>Subject: [dpdk-dev] [PATCH 1/4] hash: correct key store element alignment

>

>Correct the key store array element alignment. This is required to

>make 'pdata' in 'struct rte_hash_key' align on the correct boundary.

>

>Signed-off-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>

>Reviewed-by: Gavin Hu <gavin.hu@arm.com>

>Reviewed-by: Ola Liljedahl <ola.liljedahl@arm.com>

>Reviewed-by: Steve Capper <steve.capper@arm.com>

 [Wang, Yipeng] Acked-by: Yipeng Wang <yipeng1.wang@intel.com>

We agree on this change.

Patch

diff --git a/lib/librte_hash/rte_cuckoo_hash.c b/lib/librte_hash/rte_cuckoo_hash.c
index f7b86c8..33acfc9 100644
--- a/lib/librte_hash/rte_cuckoo_hash.c
+++ b/lib/librte_hash/rte_cuckoo_hash.c
@@ -189,7 +189,9 @@  rte_hash_create(const struct rte_hash_parameters *params)
 		goto err_unlock;
 	}
 
-	const uint32_t key_entry_size = sizeof(struct rte_hash_key) + params->key_len;
+	const uint32_t key_entry_size =
+		RTE_ALIGN(sizeof(struct rte_hash_key) + params->key_len,
+			  KEY_ALIGNMENT);
 	const uint64_t key_tbl_size = (uint64_t) key_entry_size * num_key_slots;
 
 	k = rte_zmalloc_socket(NULL, key_tbl_size,
diff --git a/lib/librte_hash/rte_cuckoo_hash.h b/lib/librte_hash/rte_cuckoo_hash.h
index b43f467..b0c7ef9 100644
--- a/lib/librte_hash/rte_cuckoo_hash.h
+++ b/lib/librte_hash/rte_cuckoo_hash.h
@@ -125,7 +125,7 @@  struct rte_hash_key {
 	};
 	/* Variable key size */
 	char key[0];
-} __attribute__((aligned(KEY_ALIGNMENT)));
+};
 
 /* All different signature compare functions */
 enum rte_hash_sig_compare_function {