From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Wang Subject: Re: [RFC v3 4/5] virtio_ring: add event idx support in packed ring Date: Tue, 8 May 2018 11:05:29 +0800 Message-ID: References: <20180425051550.24342-5-tiwei.bie@intel.com> <34781052-df9f-e505-cd3f-08e460b34dcc@redhat.com> <20180502072819.mf5l3dypk6dwx2s7@debian> <20180502164828-mutt-send-email-mst@kernel.org> <20180502151255.h3x6rhszxa3euinl@debian> <20180502184015-mutt-send-email-mst@kernel.org> <20180503011116.qvoyblcpklinrk26@debian> <20180503044218-mutt-send-email-mst@kernel.org> <20180503020949.5u3qz32gsk33z6vk@debian> <9f0b4e37-63ff-42f9-f2e6-3747a19a0206@redhat.com> <20180503135430.lbtvn4p4lyu3ksqo@debian> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20180503135430.lbtvn4p4lyu3ksqo@debian> 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: Tiwei Bie Cc: "Michael S. Tsirkin" , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, wexu@redhat.com List-Id: virtualization@lists.linuxfoundation.org CgpPbiAyMDE45bm0MDXmnIgwM+aXpSAyMTo1NCwgVGl3ZWkgQmllIHdyb3RlOgo+IE9uIFRodSwg TWF5IDAzLCAyMDE4IGF0IDAzOjI1OjI5UE0gKzA4MDAsIEphc29uIFdhbmcgd3JvdGU6Cj4+IE9u IDIwMTjlubQwNeaciDAz5pelIDEwOjA5LCBUaXdlaSBCaWUgd3JvdGU6Cj4+Pj4+PiBTbyBob3cg YWJvdXQgd2UgdXNlIHRoZSBzdHJhaWdodGZvcndhcmQgd2F5IHRoZW4/Cj4+Pj4+IFlvdSBtZWFu IHdlIGRvIG5ldyArPSB2cS0+dnJpbmdfcGFja2VkLm51bSBpbnN0ZWFkCj4+Pj4+IG9mIGV2ZW50 X2lkeCAtPSB2cS0+dnJpbmdfcGFja2VkLm51bSBiZWZvcmUgY2FsbGluZwo+Pj4+PiB2cmluZ19u ZWVkX2V2ZW50KCk/Cj4+Pj4+Cj4+Pj4+IFRoZSBwcm9ibGVtIGlzIHRoYXQsIHRoZSBzZWNvbmQg cGFyYW0gKG5ld19pZHgpIG9mCj4+Pj4+IHZyaW5nX25lZWRfZXZlbnQoKSB3aWxsIGJlIHVzZWQg Zm9yOgo+Pj4+Pgo+Pj4+PiAoX191MTYpKG5ld19pZHggLSBldmVudF9pZHggLSAxKQo+Pj4+PiAo X191MTYpKG5ld19pZHggLSBvbGQpCj4+Pj4+Cj4+Pj4+IFNvIGlmIHdlIGNoYW5nZSBuZXcsIHdl IHdpbGwgbmVlZCB0byBjaGFuZ2Ugb2xkIHRvby4KPj4+PiBJIHRoaW5rIHRoYXQgc2luY2Ugd2Ug aGF2ZSBhIGJyYW5jaCB0aGVyZSBhbnl3YXksCj4+Pj4gd2UgYXJlIGJldHRlciBvZmYganVzdCBz cGVjaWFsLWNhc2luZyBpZiAod3JhcF9jb3VudGVyICE9IHZxLT53cmFwX2NvdW50ZXIpLgo+Pj4+ IFRyZWF0IGlzIGRpZmZlcmVudHkgYW5kIGF2b2lkIGNhc3RzLgo+Pj4+Cj4+Pj4+IEFuZCB0aGF0 IHdvdWxkIGJlIGFuIHVnbHkgaGFjay4uCj4+Pj4+Cj4+Pj4+IEJlc3QgcmVnYXJkcywKPj4+Pj4g VGl3ZWkgQmllCj4+Pj4gSSBjb25zaWRlciBjYXN0cyBhbmQgaHVnZSBudW1iZXJzIHdpdGggdHdv J3MgY29tcGxlbWVudAo+Pj4+IGdhbWVzIGV2ZW4gdWdsaWVyLgo+Pj4gVGhlIGRlcGVuZGVuY3kg b24gdHdvJ3MgY29tcGxlbWVudCBnYW1lIGlzIGludHJvZHVjZWQKPj4+IHNpbmNlIHRoZSBzcGxp dCByaW5nLgo+Pj4KPj4+IEluIHBhY2tlZCByaW5nLCBvbGQgaXMgY2FsY3VsYXRlZCB2aWE6Cj4+ Pgo+Pj4gb2xkID0gdnEtPm5leHRfYXZhaWxfaWR4IC0gdnEtPm51bV9hZGRlZDsKPj4+Cj4+PiBJ biBzcGxpdCByaW5nLCBvbGQgaXMgY2FsY3VsYXRlZCB2aWE6Cj4+Pgo+Pj4gb2xkID0gdnEtPmF2 YWlsX2lkeF9zaGFkb3cgLSB2cS0+bnVtX2FkZGVkOwo+Pj4KPj4+IEluIGJvdGggY2FzZXMsIHdo ZW4gdnEtPm51bV9hZGRlZCBpcyBiaWdnZXIsIG9sZCB3aWxsCj4+PiBiZSBhIGJpZyBudW1iZXIu Cj4+Pgo+Pj4gQmVzdCByZWdhcmRzLAo+Pj4gVGl3ZWkgQmllCj4+Pgo+PiBIb3cgYWJvdXQganVz dCBkbyBzb21ldGhpbmcgbGlrZSB2aG9zdDoKPj4KPj4gc3RhdGljIHUxNiB2aG9zdF9pZHhfZGlm ZihzdHJ1Y3Qgdmhvc3RfdmlydHF1ZXVlICp2cSwgdTE2IG9sZCwgdTE2IG5ldykKPj4gewo+PiAg wqDCoMKgIGlmIChuZXcgPiBvbGQpCj4+ICDCoMKgwqAgwqDCoMKgIHJldHVybiBuZXcgLSBvbGQ7 Cj4+ICDCoMKgwqAgcmV0dXJuwqAgKG5ldyArIHZxLT5udW0gLSBvbGQpOwo+PiB9Cj4+Cj4+IHN0 YXRpYyBib29sIHZob3N0X3ZyaW5nX3BhY2tlZF9uZWVkX2V2ZW50KHN0cnVjdCB2aG9zdF92aXJ0 cXVldWUgKnZxLAo+PiAgwqDCoMKgIMKgwqDCoCDCoMKgwqAgwqDCoMKgIMKgwqDCoCDCoCBfX3Ux NiBldmVudF9vZmYsIF9fdTE2IG5ldywKPj4gIMKgwqDCoCDCoMKgwqAgwqDCoMKgIMKgwqDCoCDC oMKgwqAgwqAgX191MTYgb2xkKQo+PiB7Cj4+ICDCoMKgwqAgcmV0dXJuIChfX3UxNikodmhvc3Rf aWR4X2RpZmYodnEsIG5ldywgZXZlbnRfb2ZmKSAtIDEpIDwKPj4gIMKgwqDCoCDCoMKgwqDCoMKg wqAgKF9fdTE2KXZob3N0X2lkeF9kaWZmKHZxLCBuZXcsIG9sZCk7Cj4+IH0KPj4KPj4gPwo+IEl0 IHNlZW1zIHRoYXQgdGhlcmUgaXMgYSB0eXBvIGluIGFib3ZlIGNvZGUuIFRoZSBzZWNvbmQKPiBw YXJhbSBvZiB2aG9zdF9pZHhfZGlmZigpIGlzIGBvbGRgLCBidXQgd2hlbiBjYWxsaW5nIHRoaXMK PiBmdW5jdGlvbiBpbiB2aG9zdF92cmluZ19wYWNrZWRfbmVlZF9ldmVudCgpLCBgbmV3YCBpcwo+ IHBhc3NlZCBhcyB0aGUgc2Vjb25kIHBhcmFtLgoKUmlnaHQuCgo+Cj4gSWYgd2UgYXNzdW1lIHRo ZSBzZWNvbmQgcGFyYW0gb2Ygdmhvc3RfaWR4X2RpZmYoKSBpcyBuZXcKPiBhbmQgdGhlIHRoaXJk IG9uZSBpcyBvbGQsIGkuZS46Cj4KPiBzdGF0aWMgdTE2IHZob3N0X2lkeF9kaWZmKHN0cnVjdCB2 aG9zdF92aXJ0cXVldWUgKnZxLCB1MTYgbmV3LCB1MTYgb2xkKQo+IHsKPiAgwqDCoMKgIGlmIChu ZXcgPiBvbGQpCj4gIMKgwqDCoCDCoMKgwqAgcmV0dXJuIG5ldyAtIG9sZDsKPiAgwqDCoMKgIHJl dHVybsKgIChuZXcgKyB2cS0+bnVtIC0gb2xkKTsKPiB9Cj4KPiBJIHRoaW5rIGl0J3Mgc3RpbGwg bm90IHJpZ2h0Lgo+Cj4gQmVjYXVzZSBpbiB2aXJ0cXVldWVfZW5hYmxlX2NiX2RlbGF5ZWQoKSwg d2UgbWF5IHNldCBhbgo+IGV2ZW50X29mZiB3aGljaCBpcyBiaWdnZXIgdGhhbiBuZXcgYW5kIGJv dGggb2YgdGhlbSBoYXZlCj4gd3JhcHBlZC4gQW5kIGluIHRoaXMgY2FzZSwgYWx0aG91Z2ggbmV3 IGlzIHNtYWxsZXIgdGhhbgo+IGV2ZW50X29mZiAoaS5lLiB0aGUgdGhpcmQgcGFyYW0gLS0gb2xk KSwgbmV3IHNob3VsZG4ndAo+IGFkZCB2cS0+bnVtLCBhbmQgYWN0dWFsbHkgd2UgYXJlIGV4cGVj dGluZyBhIHZlcnkgYmlnCj4gaWR4IGRpZmYuCgpZZXMsIHNvIHRvIGNhbGN1bGF0ZSBkaXN0YW5j ZSBjb3JyZWN0bHkgYmV0d2VlbiBldmVudCBhbmQgbmV3LCB3ZSBqdXN0IApuZWVkIHRvIGNvbXBh cmUgdGhlIHdhcnAgY291bnRlciBhbmQgcmV0dXJuIGZhbHNlIGlmIGl0IGRvZXNuJ3QgbWF0Y2gg CndpdGhvdXQgdGhlIG5lZWQgdG8gdHJ5IHRvIGFkZCB2cS5udW0gaGVyZS4KClRoYW5rcwoKPgo+ IEJlc3QgcmVnYXJkcywKPiBUaXdlaSBCaWUKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fClZpcnR1YWxpemF0aW9uIG1haWxpbmcgbGlzdApWaXJ0dWFsaXph dGlvbkBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRh dGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby92aXJ0dWFsaXphdGlvbg==