From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Wang Subject: Re: [PATCH net-next] vhost_net: conditionally enable tx polling Date: Wed, 1 Nov 2017 20:51:36 +0800 Message-ID: References: <1509445640-4085-1-git-send-email-jasowang@redhat.com> <20171031182637-mutt-send-email-mst@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20171031182637-mutt-send-email-mst@kernel.org> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: "Michael S. Tsirkin" Cc: Matthew Rosato , kvm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Wei Xu List-Id: virtualization@lists.linuxfoundation.org CgpPbiAyMDE35bm0MTHmnIgwMeaXpSAwMDozNiwgTWljaGFlbCBTLiBUc2lya2luIHdyb3RlOgo+ IE9uIFR1ZSwgT2N0IDMxLCAyMDE3IGF0IDA2OjI3OjIwUE0gKzA4MDAsIEphc29uIFdhbmcgd3Jv dGU6Cj4+IFdlIGFsd2F5cyBwb2xsIHR4IGZvciBzb2NrZXQsIHRoaXMgaXMgc3ViIG9wdGltYWwg c2luY2U6Cj4+Cj4+IC0gd2Ugb25seSB3YW50IHRvIGJlIG5vdGlmaWVkIHdoZW4gc25kYnVmIGlz IGF2YWlsYWJsZQo+PiAtIHRoaXMgd2lsbCBzbGlnaHRseSBpbmNyZWFzZSB0aGUgd2FpdHF1ZXVl IHRyYXZlcnNpbmcgdGltZSBhbmQgbW9yZQo+PiAgICBpbXBvcnRhbnQsIHZob3N0IGNvdWxkIG5v dCBiZW5lZml0IGZyb20gY29tbWl0Cj4+ICAgIGNvbW1pdCA5ZTY0MWJkY2ZhNGUKPj4gICAgKCJu ZXQtdHVuOiByZXN0cnVjdHVyZSB0dW5fZG9fcmVhZCBmb3IgYmV0dGVyIHNsZWVwL3dha2V1cCBl ZmZpY2llbmN5IikKPj4gICAgZXZlbiBpZiB3ZSd2ZSBzdG9wcGVkIHJ4IHBvbGxpbmcgZHVyaW5n IGhhbmRsZV9yeCgpIHNpbmNlIHR4IHBvbGwKPj4gICAgd2VyZSBzdGlsbCBsZWZ0IGluIHRoZSB3 YWl0cXVldWUuCj4+Cj4+IFBrdGdlbiBmcm9tIGEgcmVtb3RlIGhvc3QgdG8gVk0gb3ZlciBtbHg0 IHNob3dzIDUuNSUgaW1wcm92ZW1lbnRzIG9uCj4+IHJ4IFBQUy4gKGZyb20gMS4yN01wcHMgdG8g MS4zNE1wcHMpCj4+Cj4+IENjOiBXZWkgWHUgPHdleHVAcmVkaGF0LmNvbT4KPj4gQ2M6IE1hdHRo ZXcgUm9zYXRvIDxtanJvc2F0b0BsaW51eC52bmV0LmlibS5jb20+Cj4+IFNpZ25lZC1vZmYtYnk6 IEphc29uIFdhbmcgPGphc293YW5nQHJlZGhhdC5jb20+Cj4+IC0tLQo+IE5vdyB0aGF0IHZob3N0 X3BvbGxfc3RvcCBoYXBwZW5zIG9uIGRhdGEgcGF0aAo+IGEgbG90LCBJJ2Qgc2F5Cj4gICAgICAg ICAgaWYgKHBvbGwtPndxaCkKPiB0aGVyZSBzaG91bGQgYmUgdW5saWtlbHkoKS4KCkl0IGhhcyBi ZWVuIHRoZXJlIHNpbmNlIDgyNDFhMWU0NjZjZCAoInZob3N0X25ldDogc3RvcCBwb2xsaW5nIHNv Y2tldCAKZHVyaW5nIHJ4IHByb2Nlc3NpbmciKS4gU28gaXQgd2lsbCBiZSB1c2VkIGZvciByeCBw YXRoIHRvbyB3aGljaCAKdW5saWtlbHkoKSBkb2VzIG5vdCB3b3JrIGFzIHdlbGwgYXMgdGhlIGNh c2UgaW4gdHguCgoKPgo+Cj4+ICAgZHJpdmVycy92aG9zdC9uZXQuYyB8IDExICsrKysrKysrLS0t Cj4+ICAgMSBmaWxlIGNoYW5nZWQsIDggaW5zZXJ0aW9ucygrKSwgMyBkZWxldGlvbnMoLSkKPj4K Pj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvdmhvc3QvbmV0LmMgYi9kcml2ZXJzL3Zob3N0L25ldC5j Cj4+IGluZGV4IDY4Njc3ZDkuLjI4NmMzZTQgMTAwNjQ0Cj4+IC0tLSBhL2RyaXZlcnMvdmhvc3Qv bmV0LmMKPj4gKysrIGIvZHJpdmVycy92aG9zdC9uZXQuYwo+PiBAQCAtNDcxLDYgKzQ3MSw3IEBA IHN0YXRpYyB2b2lkIGhhbmRsZV90eChzdHJ1Y3Qgdmhvc3RfbmV0ICpuZXQpCj4+ICAgCQlnb3Rv IG91dDsKPj4gICAKPj4gICAJdmhvc3RfZGlzYWJsZV9ub3RpZnkoJm5ldC0+ZGV2LCB2cSk7Cj4+ ICsJdmhvc3RfbmV0X2Rpc2FibGVfdnEobmV0LCB2cSk7Cj4+ICAgCj4+ICAgCWhkcl9zaXplID0g bnZxLT52aG9zdF9obGVuOwo+PiAgIAl6Y29weSA9IG52cS0+dWJ1ZnM7Cj4+IEBAIC01NTYsNiAr NTU3LDggQEAgc3RhdGljIHZvaWQgaGFuZGxlX3R4KHN0cnVjdCB2aG9zdF9uZXQgKm5ldCkKPj4g ICAJCQkJCSUgVUlPX01BWElPVjsKPj4gICAJCQl9Cj4+ICAgCQkJdmhvc3RfZGlzY2FyZF92cV9k ZXNjKHZxLCAxKTsKPj4gKwkJCWlmIChlcnIgPT0gLUVBR0FJTikKPj4gKwkJCQl2aG9zdF9uZXRf ZW5hYmxlX3ZxKG5ldCwgdnEpOwo+PiAgIAkJCWJyZWFrOwo+PiAgIAkJfQo+PiAgIAkJaWYgKGVy ciAhPSBsZW4pCj4gSSB3b3VsZCBwcm9iYWJseSBqdXN0IGVuYWJsZSBpdCB1bmNvbmRpdGlvbmFs bHkgaGVyZS4gV2h5IG5vdD8KPgoKSSB0aG91Z2h0IHdlIG9ubHkgY2FyZSBhYm91dCB0aGUgY2Fz ZSBvZiB0dW5fc29ja193cml0ZV9zcGFjZSgpIGFuZCBmb3IgCnRoZSBlcnJvcnMgb3RoZXIgdGhh biAtRUFHQUlOLCB0aGV5IGhhdmUgbm90aGluZyB0byBkbyB3aXRoIHBvbGxpbmcuCgo+PiBAQCAt MTE0NSw5ICsxMTQ4LDExIEBAIHN0YXRpYyBsb25nIHZob3N0X25ldF9zZXRfYmFja2VuZChzdHJ1 Y3Qgdmhvc3RfbmV0ICpuLCB1bnNpZ25lZCBpbmRleCwgaW50IGZkKQo+PiAgIAkJciA9IHZob3N0 X3ZxX2luaXRfYWNjZXNzKHZxKTsKPj4gICAJCWlmIChyKQo+PiAgIAkJCWdvdG8gZXJyX3VzZWQ7 Cj4+IC0JCXIgPSB2aG9zdF9uZXRfZW5hYmxlX3ZxKG4sIHZxKTsKPj4gLQkJaWYgKHIpCj4+IC0J CQlnb3RvIGVycl91c2VkOwo+PiArCQlpZiAoaW5kZXggPT0gVkhPU1RfTkVUX1ZRX1JYKSB7Cj4+ ICsJCQlyID0gdmhvc3RfbmV0X2VuYWJsZV92cShuLCB2cSk7Cj4+ICsJCQlpZiAocikKPj4gKwkJ CQlnb3RvIGVycl91c2VkOwo+PiArCQl9Cj4+ICAgCj4+ICAgCQlvbGR1YnVmcyA9IG52cS0+dWJ1 ZnM7Cj4+ICAgCQludnEtPnVidWZzID0gdWJ1ZnM7Cj4gVGhpcyBsYXN0IGNodW5rIHNlZW1zIHF1 ZXN0aW9uYWJsZS4gSWYgcXVldWUgaGFzIHN0dWZmIGluIGl0Cj4gd2hlbiB3ZSBjb25uZWN0IHRo ZSBiYWNrZW5kLCB3ZSdsbCBtaXNzIGEgd2FrZXVwLgo+IEkgc3VzcGVjdCB0aGlzIGNhbiBoYXBw ZW4gZHVyaW5nIG1pZ3JhdGlvbi4KClVubGVzcyBxZW11IHBhc3MgYSB0YXAgd2hpY2ggcyBhbHJl YWR5IGhhZCBwZW5kaW5nIHR4IHBhY2tldHMuCgpJIGNhbiByZW1vdmUgdGhpcyBjaHVjaywgYnV0 IGlmIGd1ZXN0IGRvZXMgbm90IHRyYW5zbWl0IGFueSBwYWNrZXQsIHJ4IApjYW4ndCBiZW5lZml0 IGZyb20gdGhpcy4KClRoYW5rcwoKPgo+Cj4+IC0tIAo+PiAyLjcuNAoKX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KVmlydHVhbGl6YXRpb24gbWFpbGluZyBs aXN0ClZpcnR1YWxpemF0aW9uQGxpc3RzLmxpbnV4LWZvdW5kYXRpb24ub3JnCmh0dHBzOi8vbGlz dHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xpc3RpbmZvL3ZpcnR1YWxpemF0aW9u