From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [PATCH net-next v2 3/5] virtio_ring: add packed ring support Date: Thu, 8 Nov 2018 10:56:02 -0500 Message-ID: <20181108103155-mutt-send-email-mst__25095.0357564308$1541692449$gmane$org@kernel.org> References: <20180711022711.7090-1-tiwei.bie@intel.com> <20180711022711.7090-4-tiwei.bie@intel.com> <20181107123933-mutt-send-email-mst@kernel.org> <20181108013759.GA20591@debian> <2d46a41e-bc00-276a-e19a-105c9dffc75a@redhat.com> <20181108115148.GA15701@debian> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <20181108115148.GA15701@debian> 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: virtio-dev@lists.oasis-open.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, wexu@redhat.com List-Id: virtualization@lists.linuxfoundation.org T24gVGh1LCBOb3YgMDgsIDIwMTggYXQgMDc6NTE6NDhQTSArMDgwMCwgVGl3ZWkgQmllIHdyb3Rl Ogo+IE9uIFRodSwgTm92IDA4LCAyMDE4IGF0IDA0OjE4OjI1UE0gKzA4MDAsIEphc29uIFdhbmcg d3JvdGU6Cj4gPiAKPiA+IE9uIDIwMTgvMTEvOCDkuIrljYg5OjM4LCBUaXdlaSBCaWUgd3JvdGU6 Cj4gPiA+ID4gPiArCj4gPiA+ID4gPiArCWlmICh2cS0+dnEubnVtX2ZyZWUgPCBkZXNjc191c2Vk KSB7Cj4gPiA+ID4gPiArCQlwcl9kZWJ1ZygiQ2FuJ3QgYWRkIGJ1ZiBsZW4gJWkgLSBhdmFpbCA9 ICVpXG4iLAo+ID4gPiA+ID4gKwkJCSBkZXNjc191c2VkLCB2cS0+dnEubnVtX2ZyZWUpOwo+ID4g PiA+ID4gKwkJLyogRklYTUU6IGZvciBoaXN0b3JpY2FsIHJlYXNvbnMsIHdlIGZvcmNlIGEgbm90 aWZ5IGhlcmUgaWYKPiA+ID4gPiA+ICsJCSAqIHRoZXJlIGFyZSBvdXRnb2luZyBwYXJ0cyB0byB0 aGUgYnVmZmVyLiAgUHJlc3VtYWJseSB0aGUKPiA+ID4gPiA+ICsJCSAqIGhvc3Qgc2hvdWxkIHNl cnZpY2UgdGhlIHJpbmcgQVNBUC4gKi8KPiA+ID4gPiBJIGRvbid0IHRoaW5rIHdlIGhhdmUgYSBy ZWFzb24gdG8gZG8gdGhpcyBmb3IgcGFja2VkIHJpbmcuCj4gPiA+ID4gTm8gaGlzdG9yaWNhbCBi YWdnYWdlIHRoZXJlLCByaWdodD8KPiA+ID4gQmFzZWQgb24gdGhlIG9yaWdpbmFsIGNvbW1pdCBs b2csIGl0IHNlZW1zIHRoYXQgdGhlIG5vdGlmeSBoZXJlCj4gPiA+IGlzIGp1c3QgYW4gIm9wdGlt aXphdGlvbiIuIEJ1dCBJIGRvbid0IHF1aXRlIHVuZGVyc3RhbmQgd2hhdCBkb2VzCj4gPiA+IHRo ZSAidGhlIGhldXJpc3RpY3Mgd2hpY2ggS1ZNIHVzZXMiIHJlZmVyIHRvLiBJZiBpdCdzIHNhZmUg dG8gZHJvcAo+ID4gPiB0aGlzIGluIHBhY2tlZCByaW5nLCBJJ2QgbGlrZSB0byBkbyBpdC4KPiA+ IAo+ID4gCj4gPiBBY2NvcmRpbmcgdG8gdGhlIGNvbW1pdCBsb2csIGl0IHNlZW1zIGxpa2UgYSB3 b3JrYXJvdW5kIG9mIGxndWVzdCBuZXR3b3JraW5nCj4gPiBiYWNrZW5kLgo+IAo+IERvIHlvdSBr bm93IHdoeSByZW1vdmluZyB0aGlzIG5vdGlmeSBpbiBUeCB3aWxsIGJyZWFrICJ0aGUKPiBoZXVy aXN0aWNzIHdoaWNoIEtWTSB1c2VzIj8gT3Igd2hhdCBkb2VzICJ0aGUgaGV1cmlzdGljcwo+IHdo aWNoIEtWTSB1c2VzIiByZWZlciB0bz8KClllcy4gUUVNVSBoYXMgYSBtb2RlIHdoZXJlIGl0IGRp c2FibGVzIG5vdGlmaWNhdGlvbnMgYW5kIHByb2Nlc3NlcyBUWApyaW5nIHBlcmlvZGljYWxseSBm cm9tIGEgdGltZXIuICBJdCdzIG9mZiBieSBkZWZhdWx0IGJ1dCB1c2VkIHRvIGJlIG9uCmJ5IGRl ZmF1bHQgYSBsb25nIHRpbWUgYWdvLiBJZiByaW5nIGJlY29tZXMgZnVsbCB0aGlzIGNhdXNlcyB0 cmFmZmljCnN0YWxscy4gIEFzIGEgd29yay1hcm91bmQgUnVzdHkgcHV0IGluIHRoaXMgaGFjayB0 byBraWNrIG9uIHJpbmcgZnVsbApldmVuIHdpdGggbm90aWZpY2F0aW9ucyBkaXNhYmxlZC4gIEl0 J3MgZWFzeSBlbm91Z2ggdG8gbWFrZSBzdXJlIFFFTVUKZG9lcyBub3QgY29tYmluZSBkZXZpY2Vz IHdpdGggcGFja2VkIHJpbmcgc3VwcG9ydCB3aXRoIHRoZSB0aW1lciBoYWNrLgpBbmQgSSBhbSBn dWVzc2luZyBpdCdzIHNhZmUgZW5vdWdoIHRvIGFsc28gYmxvY2sgdGhhdCBvcHRpb24gY29tcGxl dGVseQplLmcuIHdoZW4gdmlydGlvIDEuMCBpcyBlbmFibGVkLgoKPiAKPiA+IEkgYWdyZWUgdG8g ZHJvcCBpdCwgd2Ugc2hvdWxkIG5vdCBoYXZlIHN1Y2ggYnVyZGVuLgo+ID4gCj4gPiBCdXQgd2Ug c2hvdWxkIG5vdGljZSB0aGF0LCB3aXRoIHRoaXMgcmVtb3ZlZCwgdGhlIGNvbXBhcmUgYmV0d2Vl biBwYWNrZWQgdnMKPiA+IHNwbGl0IGlzIGtpbmQgb2YgdW5mYWlyLiBDb25zaWRlciB0aGUgcmVt b3ZhbCBvZiBsZ3Vlc3Qgc3VwcG9ydCByZWNlbnRseSwKPiA+IG1heWJlIHdlIGNhbiBkcm9wIHRo aXMgZm9yIHNwbGl0IHJpbmcgYXMgd2VsbD8KPiA+IAo+ID4gVGhhbmtzCj4gPiAKPiA+IAo+ID4g PiAKPiA+ID4gY29tbWl0IDQ0NjUzZWFlMTQwN2Y3OWRmZjZmNTJmY2Y1OTRhZTg0Y2IxNjVlYzQK PiA+ID4gQXV0aG9yOiBSdXN0eSBSdXNzZWxsPHJ1c3R5QHJ1c3Rjb3JwLmNvbS5hdT4KPiA+ID4g RGF0ZTogICBGcmkgSnVsIDI1IDEyOjA2OjA0IDIwMDggLTA1MDAKPiA+ID4gCj4gPiA+ICAgICAg dmlydGlvOiBkb24ndCBhbHdheXMgZm9yY2UgYSBub3RpZmljYXRpb24gd2hlbiByaW5nIGlzIGZ1 bGwKPiA+ID4gICAgICBXZSBmb3JjZSBub3RpZmljYXRpb24gd2hlbiB0aGUgcmluZyBpcyBmdWxs LCBldmVuIGlmIHRoZSBob3N0IGhhcwo+ID4gPiAgICAgIGluZGljYXRlZCBpdCBkb2Vzbid0IHdh bnQgdG8ga25vdy4gIFRoaXMgc2VlbWVkIGxpa2UgYSBnb29kIGlkZWEgYXQKPiA+ID4gICAgICB0 aGUgdGltZTogaWYgd2UgZmlsbCB0aGUgdHJhbnNtaXQgcmluZywgd2Ugc2hvdWxkIHRlbGwgdGhl IGhvc3QKPiA+ID4gICAgICBpbW1lZGlhdGVseS4KPiA+ID4gICAgICBVbmZvcnR1bmF0ZWx5IHRo aXMgbG9naWMgYWxzbyBhcHBsaWVzIHRvIHRoZSByZWNlaXZpbmcgcmluZywgd2hpY2ggaXMKPiA+ ID4gICAgICByZWZpbGxlZCBjb25zdGFudGx5LiAgV2Ugc2hvdWxkIGludHJvZHVjZSByZWFsIG5v dGlmaWNhdGlvbiB0aGVzaG9sZHMKPiA+ID4gICAgICB0byByZXBsYWNlIHRoaXMgbG9naWMuICBN ZWFud2hpbGUsIHJlbW92aW5nIHRoZSBsb2dpYyBhbHRvZ2V0aGVyIGJyZWFrcwo+ID4gPiAgICAg IHRoZSBoZXVyaXN0aWNzIHdoaWNoIEtWTSB1c2VzLCBzbyB3ZSB1c2UgYSBoYWNrOiBvbmx5IG5v dGlmeSBpZiB0aGVyZSBhcmUKPiA+ID4gICAgICBvdXRnb2luZyBwYXJ0cyBvZiB0aGUgbmV3IGJ1 ZmZlci4KPiA+ID4gICAgICBIZXJlIGFyZSB0aGUgbnVtYmVyIG9mIGV4aXRzIHdpdGggbGd1ZXN0 J3MgY3JhcHB5IG5ldHdvcmsgaW1wbGVtZW50YXRpb246Cj4gPiA+ICAgICAgQmVmb3JlOgo+ID4g PiAgICAgICAgICAgICAgbmV0d29yayB4bWl0IDc4NTkwNTEgcmVjdiAyMzY0MjAKPiA+ID4gICAg ICBBZnRlcjoKPiA+ID4gICAgICAgICAgICAgIG5ldHdvcmsgeG1pdCA3ODU4NjEwIHJlY3YgMTE4 MTM2Cj4gPiA+ICAgICAgU2lnbmVkLW9mZi1ieTogUnVzdHkgUnVzc2VsbDxydXN0eUBydXN0Y29y cC5jb20uYXU+Cj4gPiA+IAo+ID4gPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy92aXJ0aW8vdmlydGlv X3JpbmcuYyBiL2RyaXZlcnMvdmlydGlvL3ZpcnRpb19yaW5nLmMKPiA+ID4gaW5kZXggNzJiZjhi YzA5MDE0Li4yMWQ5YTYyNzY3YWYgMTAwNjQ0Cj4gPiA+IC0tLSBhL2RyaXZlcnMvdmlydGlvL3Zp cnRpb19yaW5nLmMKPiA+ID4gKysrIGIvZHJpdmVycy92aXJ0aW8vdmlydGlvX3JpbmcuYwo+ID4g PiBAQCAtODcsOCArODcsMTEgQEAgc3RhdGljIGludCB2cmluZ19hZGRfYnVmKHN0cnVjdCB2aXJ0 cXVldWUgKl92cSwKPiA+ID4gICAJaWYgKHZxLT5udW1fZnJlZSA8IG91dCArIGluKSB7Cj4gPiA+ ICAgCQlwcl9kZWJ1ZygiQ2FuJ3QgYWRkIGJ1ZiBsZW4gJWkgLSBhdmFpbCA9ICVpXG4iLAo+ID4g PiAgIAkJCSBvdXQgKyBpbiwgdnEtPm51bV9mcmVlKTsKPiA+ID4gLQkJLyogV2Ugbm90aWZ5KmV2 ZW4gaWYqICBWUklOR19VU0VEX0ZfTk9fTk9USUZZIGlzIHNldCBoZXJlLiAqLwo+ID4gPiAtCQl2 cS0+bm90aWZ5KCZ2cS0+dnEpOwo+ID4gPiArCQkvKiBGSVhNRTogZm9yIGhpc3RvcmljYWwgcmVh c29ucywgd2UgZm9yY2UgYSBub3RpZnkgaGVyZSBpZgo+ID4gPiArCQkgKiB0aGVyZSBhcmUgb3V0 Z29pbmcgcGFydHMgdG8gdGhlIGJ1ZmZlci4gIFByZXN1bWFibHkgdGhlCj4gPiA+ICsJCSAqIGhv c3Qgc2hvdWxkIHNlcnZpY2UgdGhlIHJpbmcgQVNBUC4gKi8KPiA+ID4gKwkJaWYgKG91dCkKPiA+ ID4gKwkJCXZxLT5ub3RpZnkoJnZxLT52cSk7Cj4gPiA+ICAgCQlFTkRfVVNFKHZxKTsKPiA+ID4g ICAJCXJldHVybiAtRU5PU1BDOwo+ID4gPiAgIAl9Cj4gPiA+IAo+ID4gPiAKX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KVmlydHVhbGl6YXRpb24gbWFpbGlu ZyBsaXN0ClZpcnR1YWxpemF0aW9uQGxpc3RzLmxpbnV4LWZvdW5kYXRpb24ub3JnCmh0dHBzOi8v bGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xpc3RpbmZvL3ZpcnR1YWxpemF0aW9u