From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Wang Subject: Re: [PATCH net-next V2 6/8] vhost: packed ring support Date: Mon, 15 Oct 2018 10:51:06 +0800 Message-ID: References: <1531711691-6769-1-git-send-email-jasowang@redhat.com> <1531711691-6769-7-git-send-email-jasowang@redhat.com> <20181012143244.GA28400@debian> <20181012131812-mutt-send-email-mst@kernel.org> <447f47fa-32dd-a408-dd81-13a9839e0748@redhat.com> <20181014224208-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: <20181014224208-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: kvm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, maxime.coquelin@redhat.com, wexu@redhat.com List-Id: virtualization@lists.linuxfoundation.org CgpPbiAyMDE45bm0MTDmnIgxNeaXpSAxMDo0MywgTWljaGFlbCBTLiBUc2lya2luIHdyb3RlOgo+ IE9uIE1vbiwgT2N0IDE1LCAyMDE4IGF0IDEwOjIyOjMzQU0gKzA4MDAsIEphc29uIFdhbmcgd3Jv dGU6Cj4+Cj4+IE9uIDIwMTjlubQxMOaciDEz5pelIDAxOjIzLCBNaWNoYWVsIFMuIFRzaXJraW4g d3JvdGU6Cj4+PiBPbiBGcmksIE9jdCAxMiwgMjAxOCBhdCAxMDozMjo0NFBNICswODAwLCBUaXdl aSBCaWUgd3JvdGU6Cj4+Pj4gT24gTW9uLCBKdWwgMTYsIDIwMTggYXQgMTE6Mjg6MDlBTSArMDgw MCwgSmFzb24gV2FuZyB3cm90ZToKPj4+PiBbLi4uXQo+Pj4+PiBAQCAtMTM2NywxMCArMTM5Nyw0 OCBAQCBsb25nIHZob3N0X3ZyaW5nX2lvY3RsKHN0cnVjdCB2aG9zdF9kZXYgKmQsIHVuc2lnbmVk IGludCBpb2N0bCwgdm9pZCBfX3VzZXIgKmFyZwo+Pj4+PiAgICAJCXZxLT5sYXN0X2F2YWlsX2lk eCA9IHMubnVtOwo+Pj4+PiAgICAJCS8qIEZvcmdldCB0aGUgY2FjaGVkIGluZGV4IHZhbHVlLiAq Lwo+Pj4+PiAgICAJCXZxLT5hdmFpbF9pZHggPSB2cS0+bGFzdF9hdmFpbF9pZHg7Cj4+Pj4+ICsJ CWlmICh2aG9zdF9oYXNfZmVhdHVyZSh2cSwgVklSVElPX0ZfUklOR19QQUNLRUQpKSB7Cj4+Pj4+ ICsJCQl2cS0+bGFzdF9hdmFpbF93cmFwX2NvdW50ZXIgPSB3cmFwX2NvdW50ZXI7Cj4+Pj4+ICsJ CQl2cS0+YXZhaWxfd3JhcF9jb3VudGVyID0gdnEtPmxhc3RfYXZhaWxfd3JhcF9jb3VudGVyOwo+ Pj4+PiArCQl9Cj4+Pj4+ICAgIAkJYnJlYWs7Cj4+Pj4+ICAgIAljYXNlIFZIT1NUX0dFVF9WUklO R19CQVNFOgo+Pj4+PiAgICAJCXMuaW5kZXggPSBpZHg7Cj4+Pj4+ICAgIAkJcy5udW0gPSB2cS0+ bGFzdF9hdmFpbF9pZHg7Cj4+Pj4+ICsJCWlmICh2aG9zdF9oYXNfZmVhdHVyZSh2cSwgVklSVElP X0ZfUklOR19QQUNLRUQpKQo+Pj4+PiArCQkJcy5udW0gfD0gdnEtPmxhc3RfYXZhaWxfd3JhcF9j b3VudGVyIDw8IDMxOwo+Pj4+PiArCQlpZiAoY29weV90b191c2VyKGFyZ3AsICZzLCBzaXplb2Yo cykpKQo+Pj4+PiArCQkJciA9IC1FRkFVTFQ7Cj4+Pj4+ICsJCWJyZWFrOwo+Pj4+PiArCWNhc2Ug VkhPU1RfU0VUX1ZSSU5HX1VTRURfQkFTRToKPj4+Pj4gKwkJLyogTW92aW5nIGJhc2Ugd2l0aCBh biBhY3RpdmUgYmFja2VuZD8KPj4+Pj4gKwkJICogWW91IGRvbid0IHdhbnQgdG8gZG8gdGhhdC4K Pj4+Pj4gKwkJICovCj4+Pj4+ICsJCWlmICh2cS0+cHJpdmF0ZV9kYXRhKSB7Cj4+Pj4+ICsJCQly ID0gLUVCVVNZOwo+Pj4+PiArCQkJYnJlYWs7Cj4+Pj4+ICsJCX0KPj4+Pj4gKwkJaWYgKGNvcHlf ZnJvbV91c2VyKCZzLCBhcmdwLCBzaXplb2YocykpKSB7Cj4+Pj4+ICsJCQlyID0gLUVGQVVMVDsK Pj4+Pj4gKwkJCWJyZWFrOwo+Pj4+PiArCQl9Cj4+Pj4+ICsJCWlmICh2aG9zdF9oYXNfZmVhdHVy ZSh2cSwgVklSVElPX0ZfUklOR19QQUNLRUQpKSB7Cj4+Pj4+ICsJCQl3cmFwX2NvdW50ZXIgPSBz Lm51bSA+PiAzMTsKPj4+Pj4gKwkJCXMubnVtICY9IH4oMSA8PCAzMSk7Cj4+Pj4+ICsJCX0KPj4+ Pj4gKwkJaWYgKHMubnVtID4gMHhmZmZmKSB7Cj4+Pj4+ICsJCQlyID0gLUVJTlZBTDsKPj4+Pj4g KwkJCWJyZWFrOwo+Pj4+PiArCQl9Cj4+Pj4gRG8gd2Ugd2FudCB0byBwdXQgd3JhcF9jb3VudGVy IGF0IGJpdCAxNT8KPj4+IEkgdGhpbmsgSSBzZWNvbmQgdGhhdCAtIHNlZW1zIHRvIGJlIGNvbnNp c3RlbnQgd2l0aAo+Pj4gZS5nLiBldmVudCBzdXBwcmVzc2lvbiBzdHJ1Y3R1cmUgYW5kIHRoZSBw cm9wb3NlZAo+Pj4gZXh0ZW5zaW9uIHRvIGRyaXZlciBub3RpZmljYXRpb25zLgo+PiBPaywgSSBh c3N1bWVzIHBhY2tlZCB2aXJ0cXVldWUgc3VwcG9ydCA2NEsgYnV0IGxvb2tzIG5vdC4gSSBjYW4g Y2hhbmdlIGl0IHRvCj4+IGJpdCAxNSBhbmQgR0VUX1ZSSU5HX0JBU0UgbmVlZCB0byBiZSBjaGFu Z2VkIGFzIHdlbGwuCj4+Cj4+Pgo+Pj4+IElmIHB1dCB3cmFwX2NvdW50ZXIgYXQgYml0IDMxLCB0 aGUgY2hlY2sgKHMubnVtID4gMHhmZmZmKQo+Pj4+IHdvbid0IGJlIGFibGUgdG8gY2F0Y2ggdGhl IGlsbGVnYWwgaW5kZXggMHg4MDAwfjB4ZmZmZiBmb3IKPj4+PiBwYWNrZWQgcmluZy4KPj4+Pgo+ PiBEbyB3ZSBuZWVkIHRvIGNsYXJpZnkgdGhpcyBpbiB0aGUgc3BlYz8KPiBJc24ndCB0aGlzIGFs bCBpbnRlcm5hbCB2aG9zdCBzdHVmZj8KCkkgbWVhbnQgdGhlIGlsbGVnYWwgaW5kZXggMHg4MDAw LTB4ZmZmZi4KCj4KPj4+Pj4gKwkJdnEtPmxhc3RfdXNlZF9pZHggPSBzLm51bTsKPj4+Pj4gKwkJ aWYgKHZob3N0X2hhc19mZWF0dXJlKHZxLCBWSVJUSU9fRl9SSU5HX1BBQ0tFRCkpCj4+Pj4+ICsJ CQl2cS0+bGFzdF91c2VkX3dyYXBfY291bnRlciA9IHdyYXBfY291bnRlcjsKPj4+Pj4gKwkJYnJl YWs7Cj4+Pj4+ICsJY2FzZSBWSE9TVF9HRVRfVlJJTkdfVVNFRF9CQVNFOgo+Pj4+IERvIHdlIG5l ZWQgdGhlIG5ldyBWSE9TVF9HRVRfVlJJTkdfVVNFRF9CQVNFIGFuZAo+Pj4+IFZIT1NUX1NFVF9W UklOR19VU0VEX0JBU0Ugb3BzPwo+Pj4+Cj4+Pj4gV2UgYXJlIGdvaW5nIHRvIG1lcmdlIGJlbG93 IHNlcmllcyBpbiBEUERLOgo+Pj4+Cj4+Pj4gaHR0cDovL3BhdGNoZXMuZHBkay5vcmcvcGF0Y2gv NDU4NzQvCj4+Pj4KPj4+PiBXZSBtYXkgbmVlZCB0byByZWFjaCBhbiBhZ3JlZW1lbnQgZmlyc3Qu Cj4+IElmIHdlIGFncmVlIHRoYXQgNjRLIHZpcnRxdWV1ZSB3b24ndCBiZSBzdXBwb3J0ZWQsIEkn bSBvayB3aXRoIGVpdGhlci4KPiBXZWxsIHRoZSBzcGVjIHNheXMgcmlnaHQgYXQgdGhlIGJlZ2lu bmluZzoKPgo+IFBhY2tlZCB2aXJ0cXVldWVzIHN1cHBvcnQgdXAgdG8gMiAxNSBlbnRyaWVzIGVh Y2guCgpPay4gSSBnZXQgaXQuCgpUaGVuIEkgY2FuIGNoYW5nZSB2aG9zdCB0byBtYXRjaCB3aGF0 IGRwZGsgZGlkLgoKVGhhbmtzCgo+Cj4KPj4gQnR3IHRoZSBjb2RlIGFzc3VtZXMgdXNlZF93cmFw X2NvdW50ZXIgaXMgZXF1YWwgdG8gYXZhaWxfd3JhcF9jb3VudGVyIHdoaWNoCj4+IGxvb2tzIHdy b25nPwo+Pgo+PiBUaGFua3MKPj4KPj4+Pj4gKwkJcy5pbmRleCA9IGlkeDsKPj4+Pj4gKwkJcy5u dW0gPSB2cS0+bGFzdF91c2VkX2lkeDsKPj4+Pj4gKwkJaWYgKHZob3N0X2hhc19mZWF0dXJlKHZx LCBWSVJUSU9fRl9SSU5HX1BBQ0tFRCkpCj4+Pj4+ICsJCQlzLm51bSB8PSB2cS0+bGFzdF91c2Vk X3dyYXBfY291bnRlciA8PCAzMTsKPj4+Pj4gICAgCQlpZiAoY29weV90b191c2VyKGFyZ3AsICZz LCBzaXplb2YgcykpCj4+Pj4+ICAgIAkJCXIgPSAtRUZBVUxUOwo+Pj4+PiAgICAJCWJyZWFrOwo+ Pj4+IFsuLi5dCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpWaXJ0dWFsaXphdGlvbiBtYWlsaW5nIGxpc3QKVmlydHVhbGl6YXRpb25AbGlzdHMubGludXgt Zm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21haWxtYW4v bGlzdGluZm8vdmlydHVhbGl6YXRpb24=