From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [PATCH RFC 03/13] vhost: batching fetches Date: Mon, 8 Jun 2020 02:01:52 -0400 Message-ID: <20200608020112-mutt-send-email-mst@kernel.org> References: <20200602130543.578420-1-mst@redhat.com> <20200602130543.578420-4-mst@redhat.com> <3323daa2-19ed-02de-0ff7-ab150f949fff@redhat.com> <20200604045830-mutt-send-email-mst@kernel.org> <6c2e6cc7-27c5-445b-f252-0356ff8a83f3@redhat.com> <20200607095219-mutt-send-email-mst@kernel.org> <0d791fe6-8fbe-ddcc-07fa-efbd4fac5ea4@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <0d791fe6-8fbe-ddcc-07fa-efbd4fac5ea4@redhat.com> Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" To: Jason Wang Cc: Eugenio =?iso-8859-1?Q?P=E9rez?= , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org List-Id: virtualization@lists.linuxfoundation.org T24gTW9uLCBKdW4gMDgsIDIwMjAgYXQgMTE6MzU6NDBBTSArMDgwMCwgSmFzb24gV2FuZyB3cm90 ZToKPiAKPiBPbiAyMDIwLzYvNyDkuIvljYg5OjU3LCBNaWNoYWVsIFMuIFRzaXJraW4gd3JvdGU6 Cj4gPiBPbiBGcmksIEp1biAwNSwgMjAyMCBhdCAxMTo0MDoxN0FNICswODAwLCBKYXNvbiBXYW5n IHdyb3RlOgo+ID4gPiBPbiAyMDIwLzYvNCDkuIvljYg0OjU5LCBNaWNoYWVsIFMuIFRzaXJraW4g d3JvdGU6Cj4gPiA+ID4gT24gV2VkLCBKdW4gMDMsIDIwMjAgYXQgMDM6Mjc6MzlQTSArMDgwMCwg SmFzb24gV2FuZyB3cm90ZToKPiA+ID4gPiA+IE9uIDIwMjAvNi8yIOS4i+WNiDk6MDYsIE1pY2hh ZWwgUy4gVHNpcmtpbiB3cm90ZToKPiA+ID4gPiA+ID4gV2l0aCB0aGlzIHBhdGNoIGFwcGxpZWQs IG5ldyBhbmQgb2xkIGNvZGUgcGVyZm9ybSBpZGVudGljYWxseS4KPiA+ID4gPiA+ID4gCj4gPiA+ ID4gPiA+IExvdHMgb2YgZXh0cmEgb3B0aW1pemF0aW9ucyBhcmUgbm93IHBvc3NpYmxlLCBlLmcu Cj4gPiA+ID4gPiA+IHdlIGNhbiBmZXRjaCBtdWx0aXBsZSBoZWFkcyB3aXRoIGNvcHlfZnJvbS90 b191c2VyIG5vdy4KPiA+ID4gPiA+ID4gV2UgY2FuIGdldCByaWQgb2YgbWFpbnRhaW5pbmcgdGhl IGxvZyBhcnJheS4gIEV0YyBldGMuCj4gPiA+ID4gPiA+IAo+ID4gPiA+ID4gPiBTaWduZWQtb2Zm LWJ5OiBNaWNoYWVsIFMuIFRzaXJraW48bXN0QHJlZGhhdC5jb20+Cj4gPiA+ID4gPiA+IFNpZ25l ZC1vZmYtYnk6IEV1Z2VuaW8gUMOpcmV6PGVwZXJlem1hQHJlZGhhdC5jb20+Cj4gPiA+ID4gPiA+ IExpbms6aHR0cHM6Ly9sb3JlLmtlcm5lbC5vcmcvci8yMDIwMDQwMTE4MzExOC44MzM0LTQtZXBl cmV6bWFAcmVkaGF0LmNvbQo+ID4gPiA+ID4gPiBTaWduZWQtb2ZmLWJ5OiBNaWNoYWVsIFMuIFRz aXJraW48bXN0QHJlZGhhdC5jb20+Cj4gPiA+ID4gPiA+IC0tLQo+ID4gPiA+ID4gPiAgICAgZHJp dmVycy92aG9zdC90ZXN0LmMgIHwgIDIgKy0KPiA+ID4gPiA+ID4gICAgIGRyaXZlcnMvdmhvc3Qv dmhvc3QuYyB8IDQ3ICsrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrLS0tLS0K PiA+ID4gPiA+ID4gICAgIGRyaXZlcnMvdmhvc3Qvdmhvc3QuaCB8ICA1ICsrKystCj4gPiA+ID4g PiA+ICAgICAzIGZpbGVzIGNoYW5nZWQsIDQ3IGluc2VydGlvbnMoKyksIDcgZGVsZXRpb25zKC0p Cj4gPiA+ID4gPiA+IAo+ID4gPiA+ID4gPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy92aG9zdC90ZXN0 LmMgYi9kcml2ZXJzL3Zob3N0L3Rlc3QuYwo+ID4gPiA+ID4gPiBpbmRleCA5YTNhMDkwMDVlMDMu LjAyODA2ZDZmODRlZiAxMDA2NDQKPiA+ID4gPiA+ID4gLS0tIGEvZHJpdmVycy92aG9zdC90ZXN0 LmMKPiA+ID4gPiA+ID4gKysrIGIvZHJpdmVycy92aG9zdC90ZXN0LmMKPiA+ID4gPiA+ID4gQEAg LTExOSw3ICsxMTksNyBAQCBzdGF0aWMgaW50IHZob3N0X3Rlc3Rfb3BlbihzdHJ1Y3QgaW5vZGUg Kmlub2RlLCBzdHJ1Y3QgZmlsZSAqZikKPiA+ID4gPiA+ID4gICAgIAlkZXYgPSAmbi0+ZGV2Owo+ ID4gPiA+ID4gPiAgICAgCXZxc1tWSE9TVF9URVNUX1ZRXSA9ICZuLT52cXNbVkhPU1RfVEVTVF9W UV07Cj4gPiA+ID4gPiA+ICAgICAJbi0+dnFzW1ZIT1NUX1RFU1RfVlFdLmhhbmRsZV9raWNrID0g aGFuZGxlX3ZxX2tpY2s7Cj4gPiA+ID4gPiA+IC0Jdmhvc3RfZGV2X2luaXQoZGV2LCB2cXMsIFZI T1NUX1RFU1RfVlFfTUFYLCBVSU9fTUFYSU9WLAo+ID4gPiA+ID4gPiArCXZob3N0X2Rldl9pbml0 KGRldiwgdnFzLCBWSE9TVF9URVNUX1ZRX01BWCwgVUlPX01BWElPViArIDY0LAo+ID4gPiA+ID4g PiAgICAgCQkgICAgICAgVkhPU1RfVEVTVF9QS1RfV0VJR0hULCBWSE9TVF9URVNUX1dFSUdIVCwg TlVMTCk7Cj4gPiA+ID4gPiA+ICAgICAJZi0+cHJpdmF0ZV9kYXRhID0gbjsKPiA+ID4gPiA+ID4g ZGlmZiAtLWdpdCBhL2RyaXZlcnMvdmhvc3Qvdmhvc3QuYyBiL2RyaXZlcnMvdmhvc3Qvdmhvc3Qu Ywo+ID4gPiA+ID4gPiBpbmRleCA4ZjlhMDcyODI2MjUuLmFjYTJhNWIwZDA3OCAxMDA2NDQKPiA+ ID4gPiA+ID4gLS0tIGEvZHJpdmVycy92aG9zdC92aG9zdC5jCj4gPiA+ID4gPiA+ICsrKyBiL2Ry aXZlcnMvdmhvc3Qvdmhvc3QuYwo+ID4gPiA+ID4gPiBAQCAtMjk5LDYgKzI5OSw3IEBAIHN0YXRp YyB2b2lkIHZob3N0X3ZxX3Jlc2V0KHN0cnVjdCB2aG9zdF9kZXYgKmRldiwKPiA+ID4gPiA+ID4g ICAgIHsKPiA+ID4gPiA+ID4gICAgIAl2cS0+bnVtID0gMTsKPiA+ID4gPiA+ID4gICAgIAl2cS0+ bmRlc2NzID0gMDsKPiA+ID4gPiA+ID4gKwl2cS0+Zmlyc3RfZGVzYyA9IDA7Cj4gPiA+ID4gPiA+ ICAgICAJdnEtPmRlc2MgPSBOVUxMOwo+ID4gPiA+ID4gPiAgICAgCXZxLT5hdmFpbCA9IE5VTEw7 Cj4gPiA+ID4gPiA+ICAgICAJdnEtPnVzZWQgPSBOVUxMOwo+ID4gPiA+ID4gPiBAQCAtMzY3LDYg KzM2OCwxMSBAQCBzdGF0aWMgaW50IHZob3N0X3dvcmtlcih2b2lkICpkYXRhKQo+ID4gPiA+ID4g PiAgICAgCXJldHVybiAwOwo+ID4gPiA+ID4gPiAgICAgfQo+ID4gPiA+ID4gPiArc3RhdGljIGlu dCB2aG9zdF92cV9udW1fYmF0Y2hfZGVzY3Moc3RydWN0IHZob3N0X3ZpcnRxdWV1ZSAqdnEpCj4g PiA+ID4gPiA+ICt7Cj4gPiA+ID4gPiA+ICsJcmV0dXJuIHZxLT5tYXhfZGVzY3MgLSBVSU9fTUFY SU9WOwo+ID4gPiA+ID4gPiArfQo+ID4gPiA+ID4gMSBkZXNjcmlwdG9yIGRvZXMgbm90IG1lYW4g MSBpb3YsIGUuZyB1c2Vyc3BhY2UgbWF5IHBhc3Mgc2V2ZXJhbCAxIGJ5dGUKPiA+ID4gPiA+IGxl bmd0aCBtZW1vcnkgcmVnaW9ucyBmb3IgdXMgdG8gdHJhbnNsYXRlLgo+ID4gPiA+ID4gCj4gPiA+ ID4gWWVzIGJ1dCBJIGRvbid0IHNlZSB0aGUgcmVsZXZhbmNlLiBUaGlzIHRlbGxzIHVzIGhvdyBt YW55IGRlc2NyaXB0b3JzIHRvCj4gPiA+ID4gYmF0Y2gsIG5vdCBob3cgbWFueSBJT1ZzLgo+ID4g PiBZZXMsIGJ1dCBxdWVzdGlvbnMgYXJlOgo+ID4gPiAKPiA+ID4gLSB0aGlzIGludHJvZHVjZSBh bm90aGVyIG9ic3RhY2xlIHRvIHN1cHBvcnQgbW9yZSB0aGFuIDFLIHF1ZXVlIHNpemUKPiA+ID4g LSBpZiB3ZSBzdXBwb3J0IDFLIHF1ZXVlIHNpemUsIGRvZXMgaXQgbWVhbiB3ZSBuZWVkIHRvIGNh Y2hlIDFLIGRlc2NyaXB0b3JzLAo+ID4gPiB3aGljaCBzZWVtcyBhIGxhcmdlIHN0cmVzcyBvbiB0 aGUgY2FjaGUKPiA+ID4gCj4gPiA+IFRoYW5rcwo+ID4gPiAKPiA+ID4gCj4gPiBTdGlsbCBkb24n dCB1bmRlcnN0YW5kIHRoZSByZWxldmFuY2UuIFdlIHN1cHBvcnQgdXAgdG8gMUsgZGVzY3JpcHRv cnMKPiA+IHBlciBidWZmZXIganVzdCBmb3IgSU9WIHNpbmNlIHdlIGFsd2F5cyBkaWQuIFRoaXMg YWRkcyA2NCBtb3JlCj4gPiBkZXNjcmlwdG9ycyAtIGlzIHRoYXQgYSBiaWcgZGVhbD8KPiAKPiAK PiBJZiBJIHVuZGVyc3RhbmRpbmcgY29ycmVjdGx5LCBmb3IgbmV0LCB0aGUgY29kZSB0cmllcyB0 byBiYXRjaCBkZXNjcmlwdG9ycwo+IGZvciBhdCBsYXN0IG9uZSBwYWNrZXQuCj4gCj4gSWYgd2Ug YWxsb3cgMUsgcXVldWUgc2l6ZSB0aGVuIHdlIGFsbG93IGEgcGFja2V0IHRoYXQgY29uc2lzdHMg b2YgMUsKPiBkZXNjcmlwdG9ycy4gVGhlbiB3ZSBuZWVkIHRvIGNhY2hlIDFLIGRlc2NyaXB0b3Jz Lgo+IAo+IFRoYW5rcwoKVGhhdCBjYXNlIGlzIGFscmVhZHkgc28gcGF0aG9sb2dpY2FsLCBJIGFt IG5vdCBhdCBhbGwgd29ycmllZCBhYm91dAppdCBwZXJmb3JtaW5nIHdlbGwuCgotLSAKTVNUCgpf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpWaXJ0dWFsaXph dGlvbiBtYWlsaW5nIGxpc3QKVmlydHVhbGl6YXRpb25AbGlzdHMubGludXgtZm91bmRhdGlvbi5v cmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4vbGlzdGluZm8vdmly dHVhbGl6YXRpb24=