From mboxrd@z Thu Jan 1 00:00:00 1970 From: George Dunlap Subject: Re: [PATCH 1/4] xen: credit2: implement utilization cap Date: Wed, 28 Jun 2017 20:05:08 +0100 Message-ID: References: <149692186557.9605.11625777539060264052.stgit@Solace.fritz.box> <149692372627.9605.8252407697848997058.stgit@Solace.fritz.box> <2db5b8c2-eb6b-3926-806e-9bcf2e46b4a1@citrix.com> <1498234767.7405.46.camel@citrix.com> <1498661812.7288.8.camel@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dQIH4-0000Oh-A5 for xen-devel@lists.xenproject.org; Wed, 28 Jun 2017 19:05:14 +0000 In-Reply-To: <1498661812.7288.8.camel@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Dario Faggioli Cc: Wei Liu , Andrew Cooper , Anshul Makkar , Ian Jackson , Jan Beulich , xen-devel List-Id: xen-devel@lists.xenproject.org T24gV2VkLCBKdW4gMjgsIDIwMTcgYXQgMzo1NiBQTSwgRGFyaW8gRmFnZ2lvbGkKPGRhcmlvLmZh Z2dpb2xpQGNpdHJpeC5jb20+IHdyb3RlOgo+IE9uIFdlZCwgMjAxNy0wNi0yOCBhdCAxNToyOCAr MDEwMCwgR2VvcmdlIER1bmxhcCB3cm90ZToKPj4gT24gRnJpLCBKdW4gMjMsIDIwMTcgYXQgNTox OSBQTSwgRGFyaW8gRmFnZ2lvbGkKPj4gPGRhcmlvLmZhZ2dpb2xpQGNpdHJpeC5jb20+IHdyb3Rl Ogo+PiA+ID4gPiArewo+PiA+ID4gPiArICAgIHN0cnVjdCBjc2NoZWQyX2RvbSAqc2RvbSA9IGRh dGE7Cj4+ID4gPiA+ICsgICAgdW5zaWduZWQgbG9uZyBmbGFnczsKPj4gPiA+ID4gKyAgICBzX3Rp bWVfdCBub3c7Cj4+ID4gPiA+ICsgICAgTElTVF9IRUFEKHBhcmtlZCk7Cj4+ID4gPiA+ICsKPj4g PiA+ID4gKyAgICBzcGluX2xvY2tfaXJxc2F2ZSgmc2RvbS0+YnVkZ2V0X2xvY2ssIGZsYWdzKTsK Pj4gPiA+ID4gKwo+PiA+ID4gPiArICAgIC8qCj4+ID4gPiA+ICsgICAgICogSXQgaXMgcG9zc2li bGUgdGhhdCB0aGUgZG9tYWluIG92ZXJydW4sIGFuZCB0aGF0IHRoZQo+PiA+ID4gPiBidWRnZXQK Pj4gPiA+ID4gaGVuY2Ugd2VudAo+PiA+ID4gPiArICAgICAqIGJlbG93IDAgKHJlYXNvbnMgbWF5 IGJlIHN5c3RlbSBvdmVyYm9va2luZywgaXNzdWVzIGluCj4+ID4gPiA+IG9yCj4+ID4gPiA+IHRv byBjb2Fyc2UKPj4gPiA+ID4gKyAgICAgKiBydW50aW1lIGFjY291bnRpbmcsIGV0Yy4pLiBJbiBw YXJ0aWN1bGFyLCBpZiB3ZSBvdmVycnVuCj4+ID4gPiA+IGJ5Cj4+ID4gPiA+IG1vcmUgdGhhbgo+ PiA+ID4gPiArICAgICAqIHRvdF9idWRnZXQsIHRoZW4gYnVkZ2V0K3RvdF9idWRnZXQgd291bGQg c3RpbGwgYmUgPCAwLAo+PiA+ID4gPiB3aGljaCBpbiB0dXJuCj4+ID4gPiA+ICsgICAgICogbWVh bnMgdGhhdCwgZGVzcGl0ZSByZXBsZW5pc2htZW50LCB0aGVyZSdzIHN0aWxsIG5vCj4+ID4gPiA+ IGJ1ZGdldAo+PiA+ID4gPiBmb3IgdW5hcmtpbmcKPj4gPiA+ID4gKyAgICAgKiBhbmQgcnVubmlu ZyB2Q1BVcy4KPj4gPiA+ID4gKyAgICAgKgo+PiA+ID4gPiArICAgICAqIEl0IGlzIGFsc28gcG9z c2libGUgdGhhdCB3ZSBhcmUgaGFuZGxpbmcgdGhlCj4+ID4gPiA+IHJlcGxlbmlzaG1lbnQKPj4g PiA+ID4gbXVjaCBsYXRlcgo+PiA+ID4gPiArICAgICAqIHRoYW4gZXhwZWN0ZWQgKHJlYXNvbnMg bWF5IGFnYWluIGJlIG92ZXJib29raW5nLCBvcgo+PiA+ID4gPiBpc3N1ZXMKPj4gPiA+ID4gd2l0 aCB0aW1lcnMpLgo+PiA+ID4gPiArICAgICAqIElmIHdlIGFyZSBtb3JlIHRoYW4gQ1NDSEVEMl9C REdUX1JFUExfUEVSSU9EIGxhdGUsIHRoaXMKPj4gPiA+ID4gbWVhbnMgd2UgaGF2ZQo+PiA+ID4g PiArICAgICAqIGJhc2ljYWxseSBza2lwcGVkIChhdCBsZWFzdCkgb25lIHJlcGxlbmlzaG1lbnQu Cj4+ID4gPiA+ICsgICAgICoKPj4gPiA+ID4gKyAgICAgKiBXZSBkZWFsIHdpdGggYm90aCB0aGUg aXNzdWVzIGhlcmUsIGJ5LCBiYXNpY2FsbHksIGRvaW5nCj4+ID4gPiA+IG1vcmUgdGhhbiBqdXN0 Cj4+ID4gPiA+ICsgICAgICogb25lIHJlcGxlbmlzaG1lbnQuIE5vdGUsIGhvd2V2ZXIsIHRoYXQg ZXZlcnkgdGltZSB3ZQo+PiA+ID4gPiBhZGQKPj4gPiA+ID4gdG90X2J1ZGdldAo+PiA+ID4gPiAr ICAgICAqIHRvIHRoZSBidWRnZXQsIHdlIGFsc28gbW92ZSBuZXh0X3JlcGwgYXdheSBieQo+PiA+ ID4gPiBDU0NIRUQyX0JER1RfUkVQTF9QRVJJT0QuCj4+ID4gPiA+ICsgICAgICogVGhpcyBndWFy YW50ZWVzIHdlIGFsd2F5cyByZXNwZWN0IHRoZSBjYXAuCj4+ID4gPiA+ICsgICAgICovCj4+ID4g PiA+ICsgICAgbm93ID0gTk9XKCk7Cj4+ID4gPiA+ICsgICAgZG8KPj4gPiA+ID4gKyAgICB7Cj4+ ID4gPiA+ICsgICAgICAgIHNkb20tPm5leHRfcmVwbCArPSBDU0NIRUQyX0JER1RfUkVQTF9QRVJJ T0Q7Cj4+ID4gPiA+ICsgICAgICAgIHNkb20tPmJ1ZGdldCArPSBzZG9tLT50b3RfYnVkZ2V0Owo+ PiA+ID4gPiArICAgIH0KPj4gPiA+ID4gKyAgICB3aGlsZSAoIHNkb20tPm5leHRfcmVwbCA8PSBu b3cgfHwgc2RvbS0+YnVkZ2V0IDw9IDAgKTsKPj4KPj4gPiBJbiBwcmVzZW5jZSBvZiBhbiBhY2Nv dW50aW5nL2VuZm9yY2luZyBlcnJvciwgaXQgbWF5IGhhcHBlbiB0aGF0IGl0Cj4+ID4gZXhlY3V0 ZXMgZm9yIEMgYmV0d2VlbiAwIGFuZCBULCBmb3IgMkMgYmV0d2VlbiBUIGFuZCAyVCwgZm9yIDAK Pj4gPiBiZXR3ZWVuCj4+ID4gMlQgYW5kIDNULCBldGMuIFNvLCBhZnRlciAzVCwgaXQgd2lsbCBh bHNvIGhhdmUgZXhlY3V0ZWQgZm9yIDNDLCBhcwo+PiA+IGFib3ZlLgo+Pgo+PiBSaWdodCwgYnV0 IGlzIHRoYXQgd2hhdCB0aGUgbG9vcCBhY3R1YWxseSBkb2VzPwo+Pgo+IEl0IHNob3VsZCBiZS4g V2VsbCwgYWN0dWFsbHksIGl0IGRvZXMgbm90IHJlYWxseSBkbyB0aGF0LCBidXQgaXQgZG9lcwo+ IHNvbWV0aGluZyB0aGF0IEkgdGhpbmsgaXMgZXF1aXZhbGVudC4KPgo+IEkgcHJvYmFibHkgc2hv dWxkIGhhdmUgZGVzY3JpYmVkIGl0IGJldHRlci4uLiBTb3JyeSEKPgo+PiBJdCBsb29rcyBsaWtl IG5vdyBpZiBpdCBleGVjdXRlcyBmb3IgMkMgYmV0d2VlbiBUIGFuZCAyVCwgdGhlbiB3aGVuCj4+ IHRoZSByZXBsZW5pc2htZW50IGhhcHBlbnMgYXQgMlQsIHRoZSBidWRnZXQgd2lsbCBiZSAtQy4g IFNvIHRoZSBmaXJzdAo+PiByb3VuZCBvZiB0aGUgbG9vcCB3aWxsIGJyaW5nIHRoZSBidWRnZXQg dG8gMDsgc2luY2UgYnVkZ2V0IDw9IDAsIHRoZW4KPj4gaXQgd2lsbCBhZGQgKmFub3RoZXIqIEMg dG8gdGhlIGJ1ZGdldC4gIFNvIHRoZW4gaXQgd2lsbCBiZSBhbGxvd2VkIHRvCj4+IGV4ZWN1dGUg Zm9yIEMgYWdhaW4gYmV0d2VlbiAyVCBhbmQgM1QsIGdpdmluZyBpdCBhIHRvdGFsIG9mIDRDCj4+ IGV4ZWN1dGVkIG92ZXIgM1QsIGluIHZpb2xhdGlvbiBvZiB0aGUgY2FwLgo+Pgo+PiBBbSBJIHJl YWRpbmcgdGhhdCB3cm9uZz8KPj4KPiBTbywgdGhlIGxvb3AgYm9keSBpbmRlZWQgYWRkcyBDLCBi dXQgaXQgYWxzbyBtb3ZlcyB0aGUgbmV4dAo+IHJlcGxlbmlzaG1lbnQgdGltZSBhaGVhZCBieSBU Lgo+Cj4gSW4gdGhlIGNhc2UgeW91IGRlc2NyaWJlLCBhdCAyVCwgd2l0aCBidWRnZXQgLUMsIHRo ZSBmaXJzdCByb3VuZCBvZiB0aGUKPiBsb29wIHdpbGwgbWFrZSB0aGUgYnVkZ2V0IDAsIGFuZCBz ZXQgdGhlIG5leHQgcmVwbGVuaXNobWVudCB0byAzVC4gQXMKPiB5b3Ugc2F5LCBzaW5jZSBidWRn ZXQgaXMgMCwgYW5kIDAgaXMgPD0gdGhhbiAwLCB3ZSBzdGF5IGluIHRoZSBsb29wIGZvcgo+IGFu b3RoZXIgcm91bmQsIHdoaWNoIHNldHMgdGhlIGJ1ZGdldCB0byBDLCBhbmQgdGhlIG5leHQgcmVw bGVuaXNobWVudAo+IHRvIDRULgoKQWgsIHJpZ2h0IC0tIEkgZGlkIG5vdGljZSB0aGF0IG5leHRf cmVwbCB3YXMgYmVpbmcgbW92ZWQgZm9yd2FyZCBlYWNoCml0ZXJhdGlvbiB0b28sIGJ1dCBkaWRu J3QgY29ubmVjdCB0aGF0IGl0IHdvdWxkIG1lYW4geW91J2QgZW5kIHVwCmdvaW5nIGZvciAyVCB3 aXRob3V0IGNhbGxpbmcgcmVwbF9zZG9tX2J1ZGdldCgpIGFnYWluLgoKU28gSSdtIGNvbnZpbmNl ZCB0aGF0IHRoaXMgYmVoYXZpb3Igd29uJ3QgYnJlYWsgdGhlIGNyZWRpdCBzeXN0ZW0sIGJ1dApJ J20gbm90IHN1cmUgd2h5IGl0J3MgYW4gYWR2YW50YWdlIG92ZXIganVzdCBoYXZpbmcgdGhlIGRv bWFpbiAic2l0Cm91dCIgdGhpcyB0aW1lIHBlcmlvZC4KCkRpZCB5b3UgYWN0dWFsbHkgc2VlIHRo aXMgaGFwcGVuIGluIHByYWN0aWNlIG9uIGEgcmVndWxhciBiYXNpcyBkdXJpbmcKeW91ciB0ZXN0 cywgb3IgaXMgdGhpcyBtb3N0bHkgYSBoeXBvdGhldGljYWwgc2l0dWF0aW9uIHdlJ3JlIHRhbGtp bmcKYWJvdXQgaGVyZT8KCj4+IEkgdGhvdWdodCB5b3UgaGFkIGludGVudGlvbmFsbHkgZGVjaWRl ZCB0byBhbGxvdyB0aGF0IHRvIGhhcHBlbiwgdG8KPj4gYXZvaWQgbWFraW5nIHRoZSBjYXBwZWQg ZG9tYWluIGhhdmUgdG8gc2l0IG91dCBmb3IgYW4gZW50aXJlIGJ1ZGdldAo+PiBwZXJpb2QuCj4+ Cj4gQWgsIHNvIEkgY29tcGxldGVseSBtaXN1bmRlcnN0b29kIHlvdXIgcG9pbnQsIHdoZW4gcmVw bHlpbmcuIEkgdGhvdWdodAo+ICp5b3UqIHdlcmUgYXJndWluZyBpbiBmYXZvdXIgb2YgYXZvaWRp bmcgdGhlIGNhcHBlZCBkb21haW4gaGF2ZSB0byBzaXQKPiBvdXQgZm9yIGFuIGVudGlyZSBidWRn ZXQgcGVyaW9kISA6LUQKClJpZ2h0LCBJIHRoaW5rIHRoYXQncyBhIG5hdHVyYWwgaW50ZXJwcmV0 YXRpb24gZ2l2ZW4gdGhlIGRpZmZlcmVuY2UgaW4KdW5kZXJzdGFuZGluZy4gOi0pCgpQZWFjZSwK IC1HZW9yZ2UKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f Clhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbi5vcmcKaHR0cHM6Ly9s aXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=