From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Wang, Yipeng1" Subject: Re: [PATCH 2/4] hash: add memory ordering to avoid race conditions Date: Tue, 2 Oct 2018 01:52:05 +0000 Message-ID: References: <1536253938-192391-1-git-send-email-honnappa.nagarahalli@arm.com> <1536253938-192391-3-git-send-email-honnappa.nagarahalli@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Cc: "dev@dpdk.org" , "Gavin Hu (Arm Technology China)" , Steve Capper , nd , "Gobriel, Sameh" To: Ola Liljedahl , Honnappa Nagarahalli , "Richardson, Bruce" , "De Lara Guarch, Pablo" Return-path: Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by dpdk.org (Postfix) with ESMTP id 42C944F9B for ; Tue, 2 Oct 2018 03:52:08 +0200 (CEST) In-Reply-To: Content-Language: en-US List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Pi0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tDQo+RnJvbTogT2xhIExpbGplZGFobCBbbWFpbHRv Ok9sYS5MaWxqZWRhaGxAYXJtLmNvbV0NCj7vu79PbiAyOC8wOS8yMDE4LCAwMjo0MywgIldhbmcs IFlpcGVuZzEiIDx5aXBlbmcxLndhbmdAaW50ZWwuY29tPiB3cm90ZToNCj4NCj4gICAgU29tZSBn ZW5lcmFsIGNvbW1lbnRzIGZvciAgdGhlIHZhcmlvdXMgX19hdG9taWNfc3RvcmUvbG9hZCBhZGRl ZCwNCj4NCj4gICAgMS4gQWx0aG91Z2ggaXQgcGFzc2VzIHRoZSBjb21waWxlciBjaGVjaywgYnV0 IEkganVzdCB3YW50IHRvIGNvbmZpcm0gdGhhdCBpZiB3ZSBzaG91bGQgdXNlIEdDQy9jbGFuZyBi dWlsdGlucywgb3IgaWYNCj4gICAgVGhlcmUgYXJlIGhpZ2hlciBsZXZlbCBBUElzIGluIERQREsg dG8gZG8gYXRvbWljIG9wZXJhdGlvbnM/DQo+W09sYV0gQWRkaW5nICJoaWdoZXIgbGV2ZWwiIEFQ SSdzIG9uIHRvcCBvZiB0aGUgYmFzaWMgbGFuZ3VhZ2UvY29tcGlsZXIgc3VwcG9ydCBpcyBub3Qg YSBnb29kIGlkZWEuDQo+VGhlcmUgaXMgYW4gaW5maW5pdGUgYW1vdW50IG9mIGJhc2UgdHlwZXMg Zm9yIHRoZSBhdG9taWMgb3BlcmF0aW9ucywgbXVsdGlwbHkgdGhhdCB3aXRoIGFsbCBkaWZmZXJl bnQgdHlwZXMgb2YgYXRvbWljIG9wZXJhdGlvbnMgKGUuZy4NCj5sb2FkLCBzdG9yZSwgZmV0Y2hf YWRkLCBhZGQsIGNhcyBldGMgZXRjKSBhbmQgdGhlIGRpZmZlcmVudCBtZW1vcnkgb3JkZXJpbmdz IGFuZCB5b3UgY3JlYXRlIGEgdmVyeSBsYXJnZSBBUEkgKGJ1dCBsaWtlbHkgb25seSBhIHNtYWxs IGJ1dA0KPmlycmVndWxhciBzdWJzZXQgd2lsbCBiZSB1c2VkKS4gU28gbG90cyBvZiB3b3JrIGZv ciBsaXR0bGUgZ2FpbiBhbmQgZGlmZmljdWx0IHRvIHRlc3QgZXZlcnkgc2luZ2xlIGl0ZW0gaW4g dGhlIEFQSS4NCj4NCj5Gb3Igc29tZSBjb21waWxlciB0aGF0IGRvZXMgbm90IHN1cHBvcnQgX19h dG9taWMgYnVpbHRpbnMsIG9uZSBjb3VsZCB3cml0ZSBhbiBfX2F0b21pYyBlbXVsYXRpb24gbGF5 ZXIuIEJ1dCBJIHRoaW5rIEdDQyBfX2F0b21pYyBpcw0KPmFscmVhZHkgdGhlIGlkZWFsIHNvdXJj ZSBjb2RlIGFic3RyYWN0aW9uLg0KW1dhbmcsIFlpcGVuZ11UaGFua3MgZm9yIHRoZSBleHBsYW5h dGlvbi4gSSB0aGluayBPVlMgZG9lcyBzb21ldGhpbmcgbGlrZSB1c2luZyBtYWNyb3MgdG8gYWJz dHJhY3QgdGhlIHZhcmlvdXMgYXRvbWljDQpmdW5jdGlvbiBmcm9tIGRpZmZlcmVudCBjb21waWxl cnMvYXJjaGl0ZWN0dXJlcy4gQnV0IGFueXdheSwNCnNpbmNlIHJ0ZV9yaW5nIGlzIHVzaW5nIHRo ZSBidWlsdGluIGFzIHdlbGwgYW5kIHRoZSBjb21waWxlciBjaGVjayBwYXNzZWQsIEkgYW0gT0sg d2l0aCB0aGUgaW1wbGVtZW50YXRpb24uDQpBbm90aGVyIGNvbW1lbnQgSSByZXBsaWVkIGVhcmxp ZXIgaXMgdGhhdCBydGVfcmluZyBzZWVtcyBoYXZpbmcgYSBjMTEgaGVhZGVyIGZvciB1c2luZyB0 aGVtLiBTaG91bGQgd2UNCmFzc3VtZSBzaW1pbGFyIHRoaW5nPw0KDQo+DQo+DQo+ICAgIDIuIFdl IGJlbGlldmUgY29tcGlsZXIgd2lsbCB0cmFuc2xhdGUgdGhlIGF0b21pY19zdG9yZS9sb2FkIHRv IHJlZ3VsYXIgTU9WIGluc3RydWN0aW9uIG9uDQo+ICAgIFRvdGFsIFN0b3JlIE9yZGVyIGFyY2hp dGVjdHVyZSAoZS5nLiBYODZfNjQpLiBCdXQgd2UgcnVuIHRoZSBwZXJmIHRlc3Qgb24geDg2IGFu ZCBoZXJlIGlzIHRoZSByZWxhdGl2ZSBzbG93ZG93biBvbg0KPiAgICBsb29rdXAgY29tcGFyaW5n IHRvIG1hc3RlciBoZWFkLiBJIGFtIG5vdCBzdXJlIGlmIHRoZSBwZXJmb3JtYW5jZSBkcm9wIGNv bWVzIGZyb20gdGhlIGF0b21pYyBidWl0aW5zLg0KPltPbGFdIEFueSBwZXJmb3JtYW5jZSBkaWZm ZXJlbmNlIGlzIG1vc3QgbGlrZWx5IG5vdCBmcm9tIHRoZSB1c2Ugb2YgYXRvbWljIGJ1aWx0aW5z IGJlY2F1c2UgYXMgeW91IHdyaXRlLCBvbiB4ODYgdGhleSBzaG91bGQgdHJhbnNsYXRlDQo+dG8g bm9ybWFsIGxvYWRzIGFuZCBzdG9yZXMgaW4gbW9zdCBzaXR1YXRpb25zLiBCdXQgdGhlIGNvZGUg YW5kIGRhdGEgc3RydWN0dXJlcyBoYXZlIGNoYW5nZWQgc28gdGhlcmUgaXMgc29tZSBkaWZmZXJl bmNlIGluIGUuZy4NCj5tZW1vcnkgYWNjZXNzZXMsIGNvdWxkbid0IHRoaXMgZXhwbGFpbiB0aGUg cGVyZm9ybWFuY2UgZGlmZmVyZW5jZT8+DQpbV2FuZywgWWlwZW5nXSBZZXMgaXQgbWlnaHQgYmUu IA0KDQoNCj4gICAgW1dhbmcsIFlpcGVuZ10gSSBkaWQgbm90IHF1aXRlIHVuZGVyc3RhbmQgd2h5 IGRvIHdlIG5lZWQgc3luY2hyb25pemF0aW9uIGZvciBoYXNoIGRhdGEgdXBkYXRlLg0KPiAgICBT aW5jZSBwZGF0YSB3cml0ZSBpcyBhbHJlYWR5IGF0b21pYywgdGhlIGxvb2t1cCB3aWxsIGVpdGhl ciByZWFkIG91dCB0aGUgc3RhbGUgZGF0YSBvciB0aGUgbmV3IGRhdGEsDQo+ICAgIHdoaWNoIHNo b3VsZCBiZSBmaW5lIHdpdGhvdXQgc3luY2hyb25pemF0aW9uLg0KPiAgICBJcyBpdCB0byBlbnN1 cmUgdGhlIG9yZGVyIG9mIG11bHRpcGxlIHJlYWRzIGluIGxvb2t1cCB0aHJlYWRzPw0KPltPbGFd IElmIHBkYXRhIGlzIHVzZWQgYXMgYSByZWZlcmVuY2UgdG8gYWNjZXNzIG90aGVyIHNoYXJlZCBk YXRhLCB5b3UgbmVlZCB0byBlbnN1cmUgdGhhdCB0aGUgYWNjZXNzIG9mIHBkYXRhIGFuZCBhY2Nl c3NlcyB0byBvdGhlcg0KPmRhdGEgYXJlIG9yZGVyZWQgYXBwcm9wcmlhdGVseSAoZS5nLiB3aXRo IGFjcXVpcmUvcmVsZWFzZSkuIEkgdGhpbmsgcmVhZGluZyBhIG5ldyBwZGF0YSBidXQgc3RhbGUg YXNzb2NpYXRlZCBkYXRhIGlzIGEgYmFkIHRoaW5nLg0KPg0KW1dhbmcsIFlpcGVuZ10gVGhhbmtz IGZvciB0aGUgZXhwbGFuYXRpb24uIEkgZ290IGl0IG5vdyENCg0KDQo=