From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 074DD45EEC for ; Thu, 19 Dec 2024 12:02:46 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id EF93F402B4; Thu, 19 Dec 2024 12:02:45 +0100 (CET) Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by mails.dpdk.org (Postfix) with ESMTP id 28400402A0; Thu, 19 Dec 2024 12:02:43 +0100 (CET) Received: from mail.maildlp.com (unknown [172.19.88.194]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4YDSH10NKVz16PjZ; Thu, 19 Dec 2024 18:59:25 +0800 (CST) Received: from dggemv711-chm.china.huawei.com (unknown [10.1.198.66]) by mail.maildlp.com (Postfix) with ESMTPS id 122671401F2; Thu, 19 Dec 2024 19:02:41 +0800 (CST) Received: from kwepemn200010.china.huawei.com (7.202.194.133) by dggemv711-chm.china.huawei.com (10.1.198.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Thu, 19 Dec 2024 19:02:40 +0800 Received: from kwepemd500024.china.huawei.com (7.221.188.194) by kwepemn200010.china.huawei.com (7.202.194.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Thu, 19 Dec 2024 19:02:40 +0800 Received: from kwepemd500024.china.huawei.com ([7.221.188.194]) by kwepemd500024.china.huawei.com ([7.221.188.194]) with mapi id 15.02.1544.011; Thu, 19 Dec 2024 19:02:40 +0800 From: "Wangyunjian(wangyunjian,TongTu)" To: David Marchand , "maxime.coquelin@redhat.com" CC: "dev@dpdk.org" , "chenbox@nvidia.com" , "Lilijun (Jerry)" , "xiawei (H)" , wangzengyuan , "stable@dpdk.org" Subject: RE: [PATCH 1/1] vhost: fix a double fetch when dequeue offloading Thread-Topic: [PATCH 1/1] vhost: fix a double fetch when dequeue offloading Thread-Index: AQHbUeCfDFMb3moSS0+hMQxlUzfoA7LtOyp7gAAU4AA= Date: Thu, 19 Dec 2024 11:02:40 +0000 Message-ID: <5809b61b17cf490b98b1bbec74c55b1a@huawei.com> References: <91dc12662805a3867413940f856ba9454b91c579.1734588243.git.wangyunjian@huawei.com> In-Reply-To: Accept-Language: en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.174.242.157] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org DQo+IC0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tDQo+IEZyb206IERhdmlkIE1hcmNoYW5kIFtt YWlsdG86ZGF2aWQubWFyY2hhbmRAcmVkaGF0LmNvbV0NCj4gU2VudDogVGh1cnNkYXksIERlY2Vt YmVyIDE5LCAyMDI0IDQ6MjQgUE0NCj4gVG86IFdhbmd5dW5qaWFuKHdhbmd5dW5qaWFuLFRvbmdU dSkgPHdhbmd5dW5qaWFuQGh1YXdlaS5jb20+Ow0KPiBtYXhpbWUuY29xdWVsaW5AcmVkaGF0LmNv bQ0KPiBDYzogZGV2QGRwZGsub3JnOyBjaGVuYm94QG52aWRpYS5jb207IExpbGlqdW4gKEplcnJ5 KQ0KPiA8amVycnkubGlsaWp1bkBodWF3ZWkuY29tPjsgeGlhd2VpIChIKSA8eGlhd2VpNDBAaHVh d2VpLmNvbT47DQo+IHdhbmd6ZW5neXVhbiA8d2FuZ3plbmd5dWFuQGh1YXdlaS5jb20+OyBzdGFi bGVAZHBkay5vcmcNCj4gU3ViamVjdDogUmU6IFtQQVRDSCAxLzFdIHZob3N0OiBmaXggYSBkb3Vi bGUgZmV0Y2ggd2hlbiBkZXF1ZXVlIG9mZmxvYWRpbmcNCj4gDQo+IE9uIFRodSwgRGVjIDE5LCAy MDI0IGF0IDc6MzjigK9BTSBZdW5qaWFuIFdhbmcgPHdhbmd5dW5qaWFuQGh1YXdlaS5jb20+DQo+ IHdyb3RlOg0KPiA+DQo+ID4gVGhlIGhkci0+Y3N1bV9zdGFydCBkb2VzIHR3byBzdWNjZXNzaXZl IHJlYWRzIGZyb20gdXNlciBzcGFjZSB0byByZWFkIGENCj4gPiB2YXJpYWJsZSBsZW5ndGggZGF0 YSBzdHJ1Y3R1cmUuIFRoZSByZXN1bHQgb3ZlcmZsb3cgaWYgdGhlIGRhdGEgc3RydWN0dXJlDQo+ ID4gY2hhbmdlcyBiZXR3ZWVuIHRoZSB0d28gcmVhZHMuDQo+ID4NCj4gPiBUbyBmaXggdGhpcywg d2UgY2FuIHByZXZlbnQgZG91YmxlIGZldGNoIGlzc3VlIGJ5IGNvcHlpbmcgdmlydGlvX2hkciB0 bw0KPiA+IHRoZSB0ZW1wb3JhcnkgdmFyaWFibGUuDQo+ID4NCj4gPiBGaXhlczogNGRjNGUzM2Zm YTEwICgibmV0L3ZpcnRpbzogZml4IFJ4IGNoZWNrc3VtIGNhbGN1bGF0aW9uIikNCj4gPiBDYzog c3RhYmxlQGRwZGsub3JnDQo+ID4NCj4gPiBTaWduZWQtb2ZmLWJ5OiBZdW5qaWFuIFdhbmcgPHdh bmd5dW5qaWFuQGh1YXdlaS5jb20+DQo+ID4gLS0tDQo+ID4gIGxpYi92aG9zdC92aXJ0aW9fbmV0 LmMgfCAxMyArKysrKysrKy0tLS0tDQo+ID4gIDEgZmlsZSBjaGFuZ2VkLCA4IGluc2VydGlvbnMo KyksIDUgZGVsZXRpb25zKC0pDQo+ID4NCj4gPiBkaWZmIC0tZ2l0IGEvbGliL3Zob3N0L3ZpcnRp b19uZXQuYyBiL2xpYi92aG9zdC92aXJ0aW9fbmV0LmMNCj4gPiBpbmRleCA2OTkwMWFiM2I1Li41 YzQwYWU3MDY5IDEwMDY0NA0KPiA+IC0tLSBhL2xpYi92aG9zdC92aXJ0aW9fbmV0LmMNCj4gPiAr KysgYi9saWIvdmhvc3QvdmlydGlvX25ldC5jDQo+ID4gQEAgLTI5MTQsMTAgKzI5MTQsMTIgQEAg ZGVzY190b19tYnVmKHN0cnVjdCB2aXJ0aW9fbmV0ICpkZXYsIHN0cnVjdA0KPiB2aG9zdF92aXJ0 cXVldWUgKnZxLA0KPiA+ICAgICAgICAgICAgICAgICAgICAgICAgICAqIGluIGEgY29udGlndW91 cyB2aXJ0dWFsIGFyZWEuDQo+ID4gICAgICAgICAgICAgICAgICAgICAgICAgICovDQo+ID4gICAg ICAgICAgICAgICAgICAgICAgICAgY29weV92bmV0X2hkcl9mcm9tX2Rlc2MoJnRtcF9oZHIsDQo+ IGJ1Zl92ZWMpOw0KPiA+IC0gICAgICAgICAgICAgICAgICAgICAgIGhkciA9ICZ0bXBfaGRyOw0K PiA+ICAgICAgICAgICAgICAgICB9IGVsc2Ugew0KPiA+IC0gICAgICAgICAgICAgICAgICAgICAg IGhkciA9IChzdHJ1Y3QgdmlydGlvX25ldF9oZHINCj4gKikoKHVpbnRwdHJfdClidWZfdmVjWzBd LmJ1Zl9hZGRyKTsNCj4gPiArICAgICAgICAgICAgICAgICAgICAgICBydGVfbWVtY3B5KCh2b2lk ICopKHVpbnRwdHJfdCkmdG1wX2hkciwNCj4gPiArICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICh2b2lkDQo+ICopKHVpbnRwdHJfdClidWZfdmVjWzBdLmJ1Zl9hZGRyLA0KPiA+ICsgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgc2l6ZW9mKHN0cnVjdCB2aXJ0aW9fbmV0X2hkcikp Ow0KPiA+ICAgICAgICAgICAgICAgICB9DQo+ID4gKyAgICAgICAgICAgICAgIGhkciA9ICZ0bXBf aGRyOw0KPiA+ICAgICAgICAgfQ0KPiANCj4gVGhpcyB3aWxsIG5lZWQgc29tZSBiZW5jaG1hcmss IGFzIEkgcmVtZW1iZXIgcHV0dGluZyBydGVfbWVtY3B5IGluDQo+IGlubGluZWQgaGVscGVycyBo YWQgc29tZSBwZXJmb3JtYW5jZSBpbXBhY3QuDQo+IA0KPiBJbnN0ZWFkLCBJIHdvdWxkIGNhbGwg Y29weV92bmV0X2hkcl9mcm9tX2Rlc2MgdW5jb25kaXRpb25uYWxseSwgYW5kDQo+IHN0b3JlIGlu IGEgc3RydWN0IHZpcnRpb19uZXRfaGRyIGhkciB2YXJpYWJsZSAoKyBhIGhhc192bmV0X2hkcg0K PiBib29sZWFuIHRvIGluZGljYXRlIHZhbGlkaXR5KS4NCj4gU29tZXRoaW5nIGxpa2U6DQo+ICAg ICAgICAgaWYgKHZpcnRpb19uZXRfd2l0aF9ob3N0X29mZmxvYWQoZGV2KSkgew0KPiAtICAgICAg ICAgICAgICAgaWYgKHVubGlrZWx5KGJ1Zl92ZWNbMF0uYnVmX2xlbiA8IHNpemVvZihzdHJ1Y3QN Cj4gdmlydGlvX25ldF9oZHIpKSkgew0KPiAtICAgICAgICAgICAgICAgICAgICAgICAvKg0KPiAt ICAgICAgICAgICAgICAgICAgICAgICAgKiBObyBsdWNrLCB0aGUgdmlydGlvLW5ldCBoZWFkZXIg ZG9lc24ndCBmaXQNCj4gLSAgICAgICAgICAgICAgICAgICAgICAgICogaW4gYSBjb250aWd1b3Vz IHZpcnR1YWwgYXJlYS4NCj4gLSAgICAgICAgICAgICAgICAgICAgICAgICovDQo+IC0gICAgICAg ICAgICAgICAgICAgICAgIGNvcHlfdm5ldF9oZHJfZnJvbV9kZXNjKCZ0bXBfaGRyLCBidWZfdmVj KTsNCj4gLSAgICAgICAgICAgICAgICAgICAgICAgaGRyID0gJnRtcF9oZHI7DQo+IC0gICAgICAg ICAgICAgICB9IGVsc2Ugew0KPiAtICAgICAgICAgICAgICAgICAgICAgICBoZHIgPSAoc3RydWN0 IHZpcnRpb19uZXRfaGRyDQo+ICopKCh1aW50cHRyX3QpYnVmX3ZlY1swXS5idWZfYWRkcik7DQo+ IC0gICAgICAgICAgICAgICB9DQo+ICsgICAgICAgICAgICAgICBjb3B5X3ZuZXRfaGRyX2Zyb21f ZGVzYygmaGRyLCBidWZfdmVjKTsNCj4gKyAgICAgICAgICAgICAgIGhhc192bmV0X2hkciA9IHRy dWU7DQo+ICAgICAgICAgfQ0KPiANCj4gKGJlc2lkZXMsIGluIGNvcHlfdm5ldF9oZHJfZnJvbV9k ZXNjLCB0aGUgd2hpbGUgKGNvbmQpIHt9IGxvb3AgY291bGQNCj4gYmUgY2hhbmdlZCB0byBkbyBh IGRvIHt9IHdoaWxlIChjb25kKSwgYW5kIHRoYXQgYXBwcm9hY2ggcmVxdWlyZXMNCj4gcGVyZm9y bWFuY2UgbnVtYmVycyB0b28pDQoNCkhvdyBhYm91dCB0aGlzPw0KQEAgLTI5MDQsOCArMjkwNCw4 IEBAIGRlc2NfdG9fbWJ1ZihzdHJ1Y3QgdmlydGlvX25ldCAqZGV2LCBzdHJ1Y3Qgdmhvc3Rfdmly dHF1ZXVlICp2cSwNCiAgICAgICAgdWludDMyX3QgaGRyX3JlbWFpbiA9IGRldi0+dmhvc3RfaGxl bjsNCiAgICAgICAgdWludDMyX3QgY3B5X2xlbjsNCiAgICAgICAgc3RydWN0IHJ0ZV9tYnVmICpj dXIgPSBtLCAqcHJldiA9IG07DQotICAgICAgIHN0cnVjdCB2aXJ0aW9fbmV0X2hkciB0bXBfaGRy Ow0KLSAgICAgICBzdHJ1Y3QgdmlydGlvX25ldF9oZHIgKmhkciA9IE5VTEw7DQorICAgICAgIGJv b2wgaGFzX3ZuZXRfaGRyID0gZmFsc2U7DQorICAgICAgIHN0cnVjdCB2aXJ0aW9fbmV0X2hkciBo ZHI7DQogICAgICAgIHVpbnQxNl90IHZlY19pZHg7DQogICAgICAgIHN0cnVjdCB2aG9zdF9hc3lu YyAqYXN5bmMgPSB2cS0+YXN5bmM7DQogICAgICAgIHN0cnVjdCBhc3luY19pbmZsaWdodF9pbmZv ICpwa3RzX2luZm87DQpAQCAtMjkyMSwxMSArMjkyMSwxMSBAQCBkZXNjX3RvX21idWYoc3RydWN0 IHZpcnRpb19uZXQgKmRldiwgc3RydWN0IHZob3N0X3ZpcnRxdWV1ZSAqdnEsDQogICAgICAgICAg ICAgICAgICAgICAgICAgKiBObyBsdWNrLCB0aGUgdmlydGlvLW5ldCBoZWFkZXIgZG9lc24ndCBm aXQNCiAgICAgICAgICAgICAgICAgICAgICAgICAqIGluIGEgY29udGlndW91cyB2aXJ0dWFsIGFy ZWEuDQogICAgICAgICAgICAgICAgICAgICAgICAgKi8NCi0gICAgICAgICAgICAgICAgICAgICAg IGNvcHlfdm5ldF9oZHJfZnJvbV9kZXNjKCZ0bXBfaGRyLCBidWZfdmVjKTsNCi0gICAgICAgICAg ICAgICAgICAgICAgIGhkciA9ICZ0bXBfaGRyOw0KKyAgICAgICAgICAgICAgICAgICAgICAgY29w eV92bmV0X2hkcl9mcm9tX2Rlc2MoJmhkciwgYnVmX3ZlYyk7DQogICAgICAgICAgICAgICAgfSBl bHNlIHsNCi0gICAgICAgICAgICAgICAgICAgICAgIGhkciA9IChzdHJ1Y3QgdmlydGlvX25ldF9o ZHIgKikoKHVpbnRwdHJfdClidWZfdmVjWzBdLmJ1Zl9hZGRyKTsNCisgICAgICAgICAgICAgICAg ICAgICAgIGhkciA9ICooc3RydWN0IHZpcnRpb19uZXRfaGRyICopKCh1aW50cHRyX3QpYnVmX3Zl Y1swXS5idWZfYWRkcik7DQogICAgICAgICAgICAgICAgfQ0KKyAgICAgICAgICAgICAgIGhhc192 bmV0X2hkciA9IHRydWU7DQogICAgICAgIH0NCg0KDQo+IA0KPiANCj4gPg0KPiA+ICAgICAgICAg Zm9yICh2ZWNfaWR4ID0gMDsgdmVjX2lkeCA8IG5yX3ZlYzsgdmVjX2lkeCsrKSB7DQo+ID4gQEAg LTMzNjMsNyArMzM2NSw3IEBAIHZpcnRpb19kZXZfdHhfYmF0Y2hfcGFja2VkKHN0cnVjdCB2aXJ0 aW9fbmV0DQo+ICpkZXYsDQo+ID4gIHsNCj4gPiAgICAgICAgIHVpbnQxNl90IGF2YWlsX2lkeCA9 IHZxLT5sYXN0X2F2YWlsX2lkeDsNCj4gPiAgICAgICAgIHVpbnQzMl90IGJ1Zl9vZmZzZXQgPSBz aXplb2Yoc3RydWN0IHZpcnRpb19uZXRfaGRyX21yZ19yeGJ1Zik7DQo+ID4gLSAgICAgICBzdHJ1 Y3QgdmlydGlvX25ldF9oZHIgKmhkcjsNCj4gPiArICAgICAgIHN0cnVjdCB2aXJ0aW9fbmV0X2hk ciBoZHI7DQo+ID4gICAgICAgICB1aW50cHRyX3QgZGVzY19hZGRyc1tQQUNLRURfQkFUQ0hfU0la RV07DQo+ID4gICAgICAgICB1aW50MTZfdCBpZHNbUEFDS0VEX0JBVENIX1NJWkVdOw0KPiA+ICAg ICAgICAgdWludDE2X3QgaTsNCj4gPiBAQCAtMzM4Miw4ICszMzg0LDkgQEAgdmlydGlvX2Rldl90 eF9iYXRjaF9wYWNrZWQoc3RydWN0IHZpcnRpb19uZXQNCj4gKmRldiwNCj4gPg0KPiA+ICAgICAg ICAgaWYgKHZpcnRpb19uZXRfd2l0aF9ob3N0X29mZmxvYWQoZGV2KSkgew0KPiA+ICAgICAgICAg ICAgICAgICB2aG9zdF9mb3JfZWFjaF90cnlfdW5yb2xsKGksIDAsIFBBQ0tFRF9CQVRDSF9TSVpF KSB7DQo+ID4gLSAgICAgICAgICAgICAgICAgICAgICAgaGRyID0gKHN0cnVjdCB2aXJ0aW9fbmV0 X2hkciAqKShkZXNjX2FkZHJzW2ldKTsNCj4gPiAtICAgICAgICAgICAgICAgICAgICAgICB2aG9z dF9kZXF1ZXVlX29mZmxvYWQoZGV2LCBoZHIsIHBrdHNbaV0sDQo+IGxlZ2FjeV9vbF9mbGFncyk7 DQo+ID4gKyAgICAgICAgICAgICAgICAgICAgICAgcnRlX21lbWNweSgodm9pZCAqKSh1aW50cHRy X3QpJmhkciwNCj4gPiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICh2b2lkICopKHVp bnRwdHJfdClkZXNjX2FkZHJzW2ldLA0KPiBzaXplb2Yoc3RydWN0IHZpcnRpb19uZXRfaGRyKSk7 DQo+ID4gKyAgICAgICAgICAgICAgICAgICAgICAgdmhvc3RfZGVxdWV1ZV9vZmZsb2FkKGRldiwg JmhkciwgcGt0c1tpXSwNCj4gbGVnYWN5X29sX2ZsYWdzKTsNCj4gPiAgICAgICAgICAgICAgICAg fQ0KPiA+ICAgICAgICAgfQ0KPiANCj4gSGVyZSB0b28sIHRoZXJlIG1heSBiZSBhbiBpbXBhY3Qg d2l0aCBhZGRpbmcgcnRlX21lbWNweS4NCj4gSnVzdCBkbyBhIGNvcHkgbGlrZToNCj4gDQo+ICAg ICAgICAgaWYgKHZpcnRpb19uZXRfd2l0aF9ob3N0X29mZmxvYWQoZGV2KSkgew0KPiArICAgICAg ICAgICAgICAgc3RydWN0IHZpcnRpb19uZXRfaGRyIGhkcjsNCj4gKw0KPiAgICAgICAgICAgICAg ICAgdmhvc3RfZm9yX2VhY2hfdHJ5X3Vucm9sbChpLCAwLCBQQUNLRURfQkFUQ0hfU0laRSkgew0K PiAtICAgICAgICAgICAgICAgICAgICAgICBoZHIgPSAoc3RydWN0IHZpcnRpb19uZXRfaGRyICop KGRlc2NfYWRkcnNbaV0pOw0KPiAtICAgICAgICAgICAgICAgICAgICAgICB2aG9zdF9kZXF1ZXVl X29mZmxvYWQoZGV2LCBoZHIsIHBrdHNbaV0sDQo+IGxlZ2FjeV9vbF9mbGFncyk7DQo+ICsgICAg ICAgICAgICAgICAgICAgICAgIGhkciA9ICooc3RydWN0IHZpcnRpb19uZXRfaGRyICopKGRlc2Nf YWRkcnNbaV0pOw0KPiArICAgICAgICAgICAgICAgICAgICAgICB2aG9zdF9kZXF1ZXVlX29mZmxv YWQoZGV2LCAmaGRyLCBwa3RzW2ldLA0KPiBsZWdhY3lfb2xfZmxhZ3MpOw0KPiAgICAgICAgICAg ICAgICAgfQ0KPiANCg0KVGhhbmtzIGZvciB5b3VyIHN1Z2dlc3Rpb24sIHdpbGwgaW5jbHVkZSB0 aGVtIGluIG5leHQgdmVyc2lvbi4NCg0KPiANCj4gLS0NCj4gRGF2aWQgTWFyY2hhbmQNCj4gDQoN Cg==