From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: Re: netfront/netback multiqueue exhausting grants Date: Thu, 21 Jan 2016 12:19:12 +0000 Message-ID: <1453378752.4320.26.camel@citrix.com> References: <1453292623.26343.95.camel@citrix.com> <56A0B957.9060101@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <56A0B957.9060101@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: David Vrabel , xen-devel Cc: Boris Ostrovsky , Wei Liu List-Id: xen-devel@lists.xenproject.org T24gVGh1LCAyMDE2LTAxLTIxIGF0IDEwOjU2ICswMDAwLCBEYXZpZCBWcmFiZWwgd3JvdGU6Cj4g T24gMjAvMDEvMTYgMTI6MjMsIElhbiBDYW1wYmVsbCB3cm90ZToKPiA+IFRoZXJlIGhhdmUgYmVl biBhIGZldyByZXBvcnRzIHJlY2VudGx5WzBdIHdoaWNoIHJlbGF0ZSB0byBhIGZhaWx1cmUgb2YK PiA+IG5ldGZyb250IHRvIGFsbG9jYXRlIHN1ZmZpY2llbnQgZ3JhbnQgcmVmcyBmb3IgYWxsIHRo ZSBxdWV1ZXM6Cj4gPiAKPiA+IFvCoMKgwqDCoDAuNTMzNTg5XSB4ZW5fbmV0ZnJvbnQ6IGNhbid0 IGFsbG9jIHJ4IGdyYW50IHJlZnMKPiA+IFvCoMKgwqDCoDAuNTMzNjEyXSBuZXQgZXRoMDogb25s eSBjcmVhdGVkIDMxIHF1ZXVlcwo+ID4gCj4gPiBXaGljaCBjYW4gYmUgd29ya2VkIGFyb3VuZCBi eSBpbmNyZWFzaW5nIHRoZSBudW1iZXIgb2YgZ3JhbnRzIG9uIHRoZQo+ID4gaHlwZXJ2aXNvciBj b21tYW5kIGxpbmUgb3IgYnkgbGltaXRpbmcgdGhlIG51bWJlciBvZiBxdWV1ZXMgcGVybWl0dGVk Cj4gPiBieQo+ID4gZWl0aGVyIGJhY2sgb3IgZnJvbnQgdXNpbmcgYSBtb2R1bGUgcGFyYW0gKHdo aWNoIHdhcyBicm9rZW4gYnV0IGlzIG5vdwo+ID4gZml4ZWQgb24gYm90aCBzaWRlcywgYnV0IEkn bSBub3Qgc3VyZSBpdCBoYXMgYmVlbiBiYWNrcG9ydGVkIGV2ZXJ5d2hlcmUKPiA+IHN1Y2ggdGhh dCBpdCBpcyBhIHJlbGlhYmxlIHRoaW5nIHRvIGFsd2F5cyB0ZWxsIHVzZXJzIGFzIGEgd29ya2Fy b3VuZCkuCj4gPiAKPiA+IElzIHRoZXJlIGFueSBwbGFuIHRvIGRvIGFueXRoaW5nIGFib3V0IHRo ZSBkZWZhdWx0L291dCBvZiB0aGUgYm94Cj4gPiBleHBlcmllbmNlPyBFaXRoZXIgbGltaXRpbmcg dGhlIG51bWJlciBvZiBxdWV1ZXMgb3IgbWFraW5nIGJvdGggZW5kcwo+ID4gY29wZQo+ID4gbW9y ZSBncmFjZWZ1bGx5IHdpdGggZmFpbHVyZSB0byBjcmVhdGUgc29tZSBxdWV1ZXMgKG9yIGJvdGgp IG1pZ2h0IGJlCj4gPiBzdWZmaWNpZW50Pwo+ID4gCj4gPiBJIHRoaW5rIHRoZSBjcmFzaCBhZnRl ciB0aGUgYWJvdmUgaW4gdGhlIGZpcnN0IGxpbmsgYXQgWzBdIGlzIGZpeGVkPyBJCj4gPiB0aGlu ayB0aGF0IHdhcyB0aGUgcHVycG9zZSBvZiBjYTg4ZWExMjQ3ZGYgInhlbi1uZXRmcm9udDogdXBk YXRlCj4gPiBudW1fcXVldWVzCj4gPiB0byByZWFsIGNyZWF0ZWQiIHdoaWNoIHdhcyBpbiA0LjMu Cj4gCj4gSSB0aGluayB0aGUgY29ycmVjdCBzb2x1dGlvbiBpcyB0byBpbmNyZWFzZSB0aGUgZGVm YXVsdCBtYXhpbXVtIGdyYW50Cj4gdGFibGUgc2l6ZS4KClRoYXQgY291bGQgd2VsbCBtYWtlIHNl bnNlLCBidXQgdGhlbiB0aGVyZSB3aWxsIGp1c3QgYmUgYW5vdGhlciBoaWdoZXIKbGltaXQsIHNv IHdlIHNob3VsZCBwZXJoYXBzIGRvIGJvdGguCgppLmUuIGZhY3RvcmluZyBpbjoKICogcGVyZm9y bWFuY2UgaS5lLiBhYmlsaXR5IGZvciBOIHF1ZXVlcyB0byBzYXR1cmF0ZSB3aGF0ZXZlciBzb3J0 IG9mIGxpbmsKICAgY29udGVtcG9yYXJ5IExpbnV4IGNhbiBzYXR1cmF0ZSB0aGVzZSBkYXlzLCBw bHVzIHNvbWUgaGVhZHJvb20sIG9yCiAgIHdoYXRldmVyIG90aGVyIGNlaWxpbmcgc2VlbXMgc2Vu c2libGUpCiAqIGdyYW50IHRhYmxlIHJlc291cmNlIGNvbnN1bXB0aW9uIGkuZS4gKHNlbnNpYmxl IG1heCBudW1iZXIgb2YgYmxrcyAqIG5yCiAgIGdudHMgcGVyIGJsayArIHNlbnNpYmxlIG1heCBu dW1iZXIgb2YgdmlmcyAqIG5yIGdudHMgcGVyIHZpZiArIG90aGVyCiAgIGRldnMgbmVlZHMpIDwg cGVyIGd1ZXN0IGdyYW50IGxpbWl0KSB0byBwaWNrIGJvdGggdGhlIGRlZmF1bHQgZ250dGFiCiAg IHNpemUgYW5kIHRoZSBkZWZhdWx0IG1heCBxdWV1ZXJzLgoKKG9yIHMvc2Vuc2libGUvc3VwcG9y dGFibGUvZyBldGMpLgoKPiBBbHRob3VnaCwgdW5sZXNzIHlvdSdyZSB1c2luZyB0aGUgbm90LXll dC1hcHBsaWVkIHBlci1jcHUgcndsb2NrIHBhdGNoZXMKPiBtdWx0aXF1ZXVlIGlzIHRlcnJpYmxl IG9uIG1hbnkgKG11bHRpc29ja2V0KSBzeXN0ZW1zIGFuZCB0aGUgbnVtYmVyIG9mCj4gcXVldWUg c2hvdWxkIGJlIGxpbWl0ZWQgaW4gbmV0YmFjayB0byA0IG9yIGV2ZW4ganVzdCAyLgoKUHJlc3Vt YWJseSB0aGUgZ3Vlc3QgY2FuJ3QgdGVsbCwgc28gaXQgY2FuJ3QgZG8gdGhpcy4KCkkgdGhpbmsg d2hlbiB5b3Ugc2F5ICJ0ZXJyaWJsZSIgeW91IGRvbid0IG1lYW4gIndvcnNlIHRoYW4gd2l0aG91 dCBtcSIgYnV0CnJhdGhlciAibm90IHJlYWxpc2luZyB0aGUgZXhwZWN0ZWQgZ2FpbnMgZnJvbSBh IGxhcmdlciBudW5iZXIgb2YgcXVldWVzIiwKcmlnaHQ/LgoKSWFuLgoKX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApY ZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK