From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [virtio-dev] packed ring layout proposal v3 Date: Sun, 1 Oct 2017 07:08:29 +0300 Message-ID: <20171001063817-mutt-send-email-mst@kernel.org> References: <20160915223915.qjlnlvf2w7u37bu3@redhat.com> <20170926011826-mutt-send-email-mst@kernel.org> <7A0DC0C9-F148-4161-B2D1-8D8D14D8B9A1@cisco.com> <20170928023112-mutt-send-email-mst@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: 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: "Liang, Cunming" Cc: "virtio-dev@lists.oasis-open.org" , "Steven Luong (sluong)" , "virtualization@lists.linux-foundation.org" List-Id: virtualization@lists.linuxfoundation.org T24gVGh1LCBTZXAgMjgsIDIwMTcgYXQgMDk6NDQ6MzVBTSArMDAwMCwgTGlhbmcsIEN1bm1pbmcg d3JvdGU6Cj4gCj4gR2V0IGl0IG5vdy4gUGxlYXNlIGNvcnJlY3QgbWUgaWYgSSBtaXNzaW5nIHNv bWV0aGluZy4KPiAKPiAKPiBGbGFncyBzdGF0dXMgaGludHMsCj4gCj4gLSBERVNDX0RSSVZFUiBv bmx5OiBkcml2ZXIgb3ducyB0aGUgZGVzY3JpcHRvciB3L28gYXZhaWxhYmxlIGluZm8gcmVhZHkg Zm9yIGRldmljZSB0byB1c2UKPiAKPiAtIERFU0NfRFJJVkVSIHwgREVTQ19XUkFQOiBkcml2ZXIg aGFzIHByZXBhcmVkIGFuIGF2YWlsYWJsZSBkZXNjcmlwdG9yLCBkZXZpY2UgaGFzbid0IHVzZWQg aXQgeWV0Cj4gCj4gLSBOb25lOiBkZXZpY2UgaGFzIHVzZWQgdGhlIGRlc2NyaXB0b3IsIGFuZCB3 cml0ZSBkZXNjcmlwdG9yIG91dAo+IAo+IC0gREVTQ19XUkFQIG9ubHk6IHNoYWxsIG5vdCBoYXBw ZW4sIGRldmljZSBtYWtlIHN1cmUgdG8gY2xlYXIgaXQKPiAKPiAKPiBQb2xsaW5nIGJlaGF2aW9y IGlzLAo+IAo+IC0gRGV2aWNlIG1vbml0b3IgREVTQ19XUkFQIGJpdCBzZXQgb3Igbm90OyBJZiBz ZXQsIGdvIHRvIHVzZSBkZXNjcmlwdG9yIGFuZCBjbGVhciBERVNDX0RSSVZFUiBiaXQgaW4gdGhl IGVuZCAobm90ZTogYWx3YXlzIG5lZWQgdG8gY2xlYXIgREVTQ19XUkFQKQo+IAo+IC0gRHJpdmVy IG1vbml0b3IgREVTQ19EUklWRVIgYml0IGNsZWFyZWQgb3Igbm90OyBJZiBjbGVhcmVkLCByZWNs YWltIGRlc2NyaXB0b3Ioc2V0IERFU0NfRFJJVkVSKSBhbmQgc2V0IERFU0NfV1JBUCBvbmNlIG5l dyBhdmFpbGFibGUgZGVzY3JpcHRvciBnZXQgcmVhZHkgdG8gZ28KPiAKPiAKPiAtLQo+IFN0ZXZl CgoKSG1tIG5vLCBub3Qgd2hhdCBJIGhhZCBpbiBtaW5kLgoKREVTQ19EUklWRVI6IHVzZWQgYnkg ZHJpdmVyIHRvIHBvbGwuIERyaXZlciBzZXRzIGl0IHdoZW4gd3JpdGluZyBhCmRlc2NyaXB0b3Iu ICBEZXZpY2UgY2xlYXJzIGl0IHdoZW4gb3ZlcndyaXRpbmcgYSBkZXNjcmlwdG9yLgpUaHVzIGRy aXZlciB1c2VzIERFU0NfRFJJVkVSIHRvIGRldGVjdCB0aGF0IGRldmljZSBkYXRhIGluCmRlc2Ny aXB0b3IgaXMgdmFsaWQuCgoKCkRFU0NfV1JBUDogdXNlZCBieSBkZXZpY2UgdG8gcG9sbC4gRHJp dmVyIHNldHMgaXQgdG8gYSAqZGlmZmVyZW50Kgp2YWx1ZSBldmVyeSB0aW1lIGl0IG92ZXJ3cml0 ZXMgYSBkZXNjcmlwdG9yLiBIb3cgdG8gYWNoaWV2ZSBpdD8Kc2luY2UgZGVzY3JpcHRvcnMgYXJl IHdyaXR0ZW4gb3V0IGluIHJpbmcgb3JkZXIsCnNpbXBseSBtYWludGFpbiB0aGUgY3VycmVudCB2 YWx1ZSBpbnRlcm5hbGx5IChzdGFydCB2YWx1ZSAxKSBhbmQgZmxpcCBpdApldmVyeSB0aW1lIHlv dSBvdmVyd3JpdGUgdGhlIGZpcnN0IGRlc2NyaXB0b3IuCkRldmljZSBsZWF2ZXMgaXQgaW50YWN0 IHdoZW4gb3ZlcndyaXRpbmcgYSBkZXNjcmlwdG9yLgoKCkFmdGVyIHdyaXRpbmcgZG93biB0aGlz IGV4cGxhbmF0aW9uLCBJIHRoaW5rIHRoZSBuYW1lcyBhcmVuJ3QKZ3JlYXQuCgoKCkxldCBtZSB0 cnkgYW4gYWx0ZXJuYXRpdmUgZXhwbGFuYXRpb24uCgotLS0tLS0tLS0tLS0tLS0KQSB0d28tYml0 IGZpZWxkLCBEUklWRVJfT1dORVIsIHNpZ25hbHMgdGhlIGJ1ZmZlciBvd25lcnNoaXAuCkl0IGhh cyA0IHBvc3NpYmxlIHZhbHVlczoKdmFsdWVzIDB4MSwgMHgxMSBhcmUgd3JpdHRlbiBieSBkcml2 ZXIKdmFsdWVzIDB4MCwgMHgxMCBhcmUgd3JpdHRlbiBieSBkZXZpY2UKCmVhY2ggdGltZSBkcml2 ZXIgd3JpdGVzIG91dCBhIGRlc2NyaXB0b3IsIGl0IG11c3QgbWFrZSBzdXJlCnRoYXQgdGhlIGhp Z2ggYml0IGluIE9XTkVSIGNoYW5nZXMuCgplYWNoIHRpbWUgZGV2aWNlIHdyaXRlcyBvdXQgYSBk ZXNjcmlwdG9yLCBpdCBtdXN0IG1ha2Ugc3VyZQp0aGF0IHRoZSBoaWdoIGJpdCBpbiBPV05FUiBk b2VzIG5vdCBjaGFuZ2UuCgoKCnRoaXMgaXMgZXhhY3RseSB0aGUgc2FtZSBmdW5jdGlvbmFsbHks IERSSVZFUiBpcyBoaWdoIGJpdCBhbmQKV1JBUCBpcyB0aGUgbG93IGJpdC4gIERvZXMgdGhpcyBt YWtlIHRoaW5ncyBjbGVhcmVyPwotLS0tLS0tLS0tLS0tLS0KCgoKTWF5YmUgdGhlIGRpZmZlcmVu Y2UgYmV0d2VlbiBkZXZpY2UgYW5kIGRyaXZlcgppcyBjb25mdXNpbmcuIFdlIGNhbiBmaXggdGhh dCBieSBjaGFuZ2luZyB0aGUgdmFsdWVzLgpIZXJlIGlzIGFuIGFsdGVybmF0aXZlLiBMZXQgbWUg a25vdyBpZiB5b3UgbGlrZSBpdCBiZXR0ZXIgLQpJIG5lZWQgdG8gdGhpbmsgYSBiaXQgbW9yZSB0 byBtYWtlIHN1cmUgaXQgd29ya3MsCmJ1dCB0byBnaXZlIHlvdSBhbiBpZGVhOgoKCi0tLS0tLS0t LS0tLS0tLQpBIHR3by1iaXQgZmllbGQsIERSSVZFUl9PV05FUiwgc2lnbmFscyB0aGUgYnVmZmVy IG93bmVyc2hpcC4KSXQgaGFzIDQgcG9zc2libGUgdmFsdWVzOgp2YWx1ZXMgMHgxLCAweDEwIGFy ZSB3cml0dGVuIGJ5IGRyaXZlcgp2YWx1ZXMgMHgwLCAweDExIGFyZSB3cml0dGVuIGJ5IGRldmlj ZQoKZWFjaCB0aW1lIGRyaXZlciB3cml0ZXMgb3V0IGEgZGVzY3JpcHRvciwgaXQgbXVzdCBtYWtl IHN1cmUKdGhhdCB0aGUgaGlnaCBiaXQgaW4gT1dORVIgY2hhbmdlcy4gVGh1cyBmaXJzdCB0aW1l Cml0IHdyaXRlcyAweDEwLCBuZXh0IHRpbWUgMHgxLCB0aGVuIDB4MTAgYWdhaW4uCgplYWNoIHRp bWUgZGV2aWNlIHdyaXRlcyBvdXQgYSBkZXNjcmlwdG9yLCBpdCBtdXN0IG1ha2Ugc3VyZQp0aGF0 IHRoZSBsb3cgYml0IGluIE9XTkVSIGNoYW5nZXMuICBUaHVzIGZpcnN0IHRpbWUKaXQgd3JpdGVz IDB4MTEsIG5leHQgdGltZSAweDAsIHRoZW4gMHgxMSBhZ2Fpbi4KCi0tLS0tLS0tLS0tLS0tLQoK CgoKCgoKCgoKCgoKCgoKCgoKPiA+IC0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tCj4gPiBGcm9t OiBNaWNoYWVsIFMuIFRzaXJraW4gW21haWx0bzptc3RAcmVkaGF0LmNvbV0KPiA+IFNlbnQ6IFRo dXJzZGF5LCBTZXB0ZW1iZXIgMjgsIDIwMTcgNzo0OSBBTQo+ID4gVG86IFN0ZXZlbiBMdW9uZyAo c2x1b25nKQo+ID4gQ2M6IExpYW5nLCBDdW5taW5nOyB2aXJ0aW8tZGV2QGxpc3RzLm9hc2lzLW9w ZW4ub3JnOwo+ID4gdmlydHVhbGl6YXRpb25AbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKPiA+ IFN1YmplY3Q6IFJlOiBbdmlydGlvLWRldl0gcGFja2VkIHJpbmcgbGF5b3V0IHByb3Bvc2FsIHYz Cj4gPiAKPiA+IE9uIFR1ZSwgU2VwIDI2LCAyMDE3IGF0IDExOjM4OjE4UE0gKzAwMDAsIFN0ZXZl biBMdW9uZyAoc2x1b25nKSB3cm90ZToKPiA+ID4gTWljaGFlbCwKPiA+ID4KPiA+ID4gV291bGQg eW91IHBsZWFzZSBnaXZlIGFuIGV4YW1wbGUgb3IgdHdvIGhvdyB0aGVzZSB0d28gZmxhZ3MKPiA+ IERFU0NfRFJJVkVSIGFuZCBERVNDX1dSQVAgYXJlIHVzZWQgdG9nZXRoZXI/IExpa2Ugb3RoZXJz LCBJIGFtCj4gPiBjb25mdXNlZCBieSB0aGUgZGVzY3JpcHRpb24gYW5kIHN0aWxsIGRvbuKAmXQg cXVpdGUgZ3JvayBpdC4KPiA+ID4KPiA+ID4gU3RldmVuCj4gPiAKPiA+IE15IGJhZCwgSSB3aWxs IG5lZWQgdG8gd29yayBvbiBpdC4gSGVyZSBpcyBhbiBleGFtcGxlOgo+ID4gCj4gPiBMZXQncyBh c3N1bWUgZGV2aWNlIHByb21pc2VkIHRvIGNvbnN1bWUgcGFja2V0cyBpbiBvcmRlcgo+ID4gCj4g PiByaW5nIHNpemUgPSAyCj4gPiAKPiA+IFJpbmcgaXMgMCBpbml0aWFsaXplZC4KPiA+IAo+ID4g RGV2aWNlIGluaXRpYWxseSBwb2xscyBERVNDWzBdLmZsYWdzIGZvciBXUkFQIGJpdCB0byBjaGFu Z2UuCj4gPiAKPiA+IGRyaXZlciBhZGRzOgo+ID4gCj4gPiBERVNDWzBdLmFkZHIgPSAxMjM0Cj4g PiBERVNDWzBdLmlkID0gMAo+ID4gREVTQ1swXS5mbGFncyA9IERFU0NfRFJJVkVSIHwgREVTQ19O RVhUIHwgREVTQ19XUkFQCj4gPiAKPiA+IGFuZAo+ID4gCj4gPiBERVNDWzBdLmFkZHIgPSA1Njc4 Cj4gPiBERVNDWzFdLmlkID0gMQo+ID4gREVTQ1sxXS5mbGFncyA9IERFU0NfRFJJVkVSIHwgREVT Q19XUkFQCj4gPiAKPiA+IAo+ID4gaXQgbm93IHN0YXJ0cyBwb2xsaW5nIERFU0NbMF0gZmxhZ3Mu Cj4gPiAKPiA+IAo+ID4gRGV2aWNlIHJlYWRzIDEyMzQsIGV4ZWN1dGVzIGl0LCBkb2VzIG5vdCB1 c2UgaXQuCj4gPiAKPiA+IERldmljZSByZWFkcyA1Njc4LCBleGVjdXRlcyBpdCwgYW5kIHVzZXMg aXQ6Cj4gPiAKPiA+IERFU0NbMF0uaWQgPSAxCj4gPiBERVNDWzBdLmZsYWdzID0gMAo+ID4gCj4g PiBEZXZpY2Ugbm93IHBvbGxzIERFU0NbMF0uZmxhZ3MgZm9yIFdSQVAgYml0IHRvIGNoYW5nZS4K PiA+IAo+ID4gTm93IGRyaXZlciBzZWVzIHRoYXQgRFJJVkVSIGJpdCBoYXMgYmVlbiBjbGVhcmVk LCBzbyBpdCBub3dzIHRoYXQgaWQgaXMgdmFsaWQuIEkKPiA+IHNlZXMgaWQgMSwgdGhlcmVmb3Jl IGlkIDAgYW5kIDEgaGFzIGJlZW4gcmVhZCBhbmQgYXJlIHNhZmUgdG8gb3ZlcndyaXRlLgo+ID4g Cj4gPiBTbyBpdCB3cml0ZXMgaXQgb3V0LiBJdCB3cmFwcGVkIGFyb3VuZCB0byBiZWdpbm5pbmcg b2YgcmluZywgc28gaXQgZmxpcHMgdGhlCj4gPiBXUkFQIGJpdCB0byAwIG9uIGFsbCBkZXNjcmlw dG9ycyBub3c6Cj4gPiAKPiA+IERFU0NbMF0uYWRkciA9IDlBQkMKPiA+IERFU0NbMF0uaWQgPSAw Cj4gPiBERVNDWzBdLmZsYWdzID0gREVTQ19EUklWRVIgfCBERVNDX05FWFQKPiA+IAo+ID4gCj4g PiBERVNDWzBdLmFkZHIgPSBERUYwCj4gPiBERVNDWzBdLmlkID0gMQo+ID4gREVTQ1swXS5mbGFn cyA9IERFU0NfRFJJVkVSCj4gPiAKPiA+IAo+ID4gTmV4dCByb3VuZCB3cmFwIHdpbGwgYmUgMSBh Z2Fpbi4KPiA+IAo+ID4gCj4gPiBUbyBzdW1tYXJpc2U6Cj4gPiAKPiA+IERSSVZFUiBiaXQgaXMg dXNlZCBieSBkcml2ZXIgdG8gZGV0ZWN0IGRldmljZSBoYXMgdXNlZCBvbmUgb3IgbW9yZQo+ID4g ZGVzY3JpcHRvcnMuICBXUkFQIGlzIGlzIHVzZWQgYnkgZGV2aWNlIHRvIGRldGVjdCBkcml2ZXIg aGFzIG1hZGUgYSBuZXcKPiA+IGRlc2NyaXB0b3IgYXZhaWxhYmxlLgo+ID4gCj4gPiAKPiA+IC0t Cj4gPiBNU1QKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18K VmlydHVhbGl6YXRpb24gbWFpbGluZyBsaXN0ClZpcnR1YWxpemF0aW9uQGxpc3RzLmxpbnV4LWZv dW5kYXRpb24ub3JnCmh0dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xp c3RpbmZvL3ZpcnR1YWxpemF0aW9u