From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Xu, Quan" Subject: Re: [PATCH v8 1/3] VT-d: Reduce spin timeout to 1ms, which can be boot-time changed Date: Thu, 24 Mar 2016 11:28:57 +0000 Message-ID: <945CA011AD5F084CBEA3E851C0AB28894B86B213@SHSMSX101.ccr.corp.intel.com> References: <1458799079-79825-1-git-send-email-quan.xu@intel.com> <1458799079-79825-3-git-send-email-quan.xu@intel.com> <1458817469.5082.14.camel@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1458817469.5082.14.camel@citrix.com> Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Dario Faggioli , "xen-devel@lists.xen.org" Cc: "Tian, Kevin" , "Wu, Feng" , "jbeulich@suse.com" List-Id: xen-devel@lists.xenproject.org T24gTWFyY2ggMjQsIDIwMTYgNzowNHBtLCA8ZGFyaW8uZmFnZ2lvbGlAY2l0cml4LmNvbT4gd3Jv dGU6DQo+IE9uIFRodSwgMjAxNi0wMy0yNCBhdCAxMzo1NyArMDgwMCwgUXVhbiBYdSB3cm90ZToN Cj4gPg0KPiA+IC0tLSBhL2RvY3MvbWlzYy94ZW4tY29tbWFuZC1saW5lLm1hcmtkb3duDQo+ID4g KysrIGIvZG9jcy9taXNjL3hlbi1jb21tYW5kLWxpbmUubWFya2Rvd24NCj4gPiBAQCAtMTUzMiw2 ICsxNTMyLDEzIEBAIE5vdGUgdGhhdCBpZiAqKndhdGNoZG9nKiogb3B0aW9uIGlzIGFsc28NCj4g PiBzcGVjaWZpZWQgdnBtdSB3aWxsIGJlIHR1cm5lZCBvZmYuDQo+ID4gwqBBcyB0aGUgdmlydHVh bGlzYXRpb24gaXMgbm90IDEwMCUgc2FmZSwgZG9uJ3QgdXNlIHRoZSB2cG11IGZsYWcgb24NCj4g PiDCoHByb2R1Y3Rpb24gc3lzdGVtcyAoc2VlIGh0dHA6Ly94ZW5iaXRzLnhlbi5vcmcveHNhL2Fk dmlzb3J5LTE2My5odG1sDQo+ID4gKSENCj4gPg0KPiA+ICsjIyMgdnRkXF9xaVxfdGltZW91dCAo VlQtZCkNCj4gPiArPiBgPSA8aW50ZWdlcj5gDQo+ID4gKw0KPiA+ICs+IERlZmF1bHQ6IGAxYA0K PiA+ICsNCj4gPiArU3BlY2lmeSB0aGUgdGltZW91dCBvZiB0aGUgVlQtZCBRdWV1ZWQgSW52YWxp ZGF0aW9uIGluIG1pbGxpc2Vjb25kcy4NCj4gPiArDQo+IFBlcmhhcHMgd2Ugc2hvdWxkIHB1dCBk b3duIGEgcXVpY2sgcGFyYWdyYXBoIHRvIGV4cGxhaW4gd2hhdCB0aGlzIHBhcmFtZXRlcg0KPiBp cyBhYm91dCwgYW5kIHdoYXQgaGFwcGVucyBpZiB0aGUgdGltZW91dCBleHBpcmVzPw0KPiANCj4g R2l2aW5nIGhpbnRzIG9uIHVuZGVyIHdoYXQgY29uZGl0aW9ucyBvbmUgc2hvdWxkIGNoYW5nZSB0 aGlzIHZhbHVlIHdvdWxkIGJlDQo+IGV2ZW4gbW9yZSB3ZWxjb21lIChlLmcuICJpZiB5b3Ugc2Vl IGVycm9yIFhYWCwgdHJ5IGluY3JlYXNpbmcgdGhlIHRpbWVvdXQgdG8NCj4gbm5uIikuDQo+IA0K TWFrZSBzZW5zZS4gSSB3b3VsZCBzZW5kIG91dCB0aGlzIHBhcmFncmFwaCBiZWZvcmUgdjkuIEkg aG9wZSB5b3UgY291bGQgaGVscCBtZSBjb3JyZWN0IGl0LiA6KQ0KDQoNCj4gPiAtLS0gYS94ZW4v ZHJpdmVycy9wYXNzdGhyb3VnaC92dGQvcWludmFsLmMNCj4gPiArKysgYi94ZW4vZHJpdmVycy9w YXNzdGhyb3VnaC92dGQvcWludmFsLmMNCj4gPg0KPiA+IEBAIC0xMzAsMTAgKzEzNSwxMCBAQCBz dGF0aWMgdm9pZCBxdWV1ZV9pbnZhbGlkYXRlX2lvdGxiKHN0cnVjdCBpb21tdQ0KPiA+DQo+ID4g KmlvbW11LA0KPiA+IMKgwqDCoMKgwqBzcGluX3VubG9ja19pcnFyZXN0b3JlKCZpb21tdS0+cmVn aXN0ZXJfbG9jaywgZmxhZ3MpOw0KPiA+IMKgfQ0KPiA+DQo+ID4gLXN0YXRpYyBpbnQgcXVldWVf aW52YWxpZGF0ZV93YWl0KHN0cnVjdCBpb21tdSAqaW9tbXUsDQo+ID4gK3N0YXRpYyBpbnQgX19t dXN0X2NoZWNrIHF1ZXVlX2ludmFsaWRhdGVfd2FpdChzdHJ1Y3QgaW9tbXUgKmlvbW11LA0KPiA+ IMKgwqDCoMKgwqB1OCBpZmxhZywgdTggc3csIHU4IGZuKQ0KPiA+IMKgew0KPiA+DQo+IEknbSBu b3Qgc3VyZSBpdCBpcyBvayB0byBhZGQgdGhlIF9fbXVzdF9jaGVjayBhbm5vdGF0aW9uIGhlcmUg aW4gdGhpcyBwYXRjaCwNCj4gY29uc2lkZXJpbmcgdGhhdCB0aGUgc3ViamVjdCBzYXlzICJWVC1k OiBSZWR1Y2Ugc3BpbiB0aW1lb3V0IHRvIDFtcywgd2hpY2ggY2FuDQo+IGJlIGJvb3QtdGltZSBj aGFuZ2VkIiwgYW5kIHRoZXJlIGlzIG5vIGNoYW5nZWxvZy4NCj4gDQo+IFBlcnNvbmFsbHksIEkg dGhpbmsgaXQgY291bGQgYmUgb2ssIGJ1dCBhdCBsZWFzdCBhZGQgYSBmZXcgd29yZHMgb2YgY2hh bmdlbG9nLA0KPiBtZW50aW9uaW5nIHRoYXQgdGhpcyBpcyBhbHNvIGJlaW5nIGRvbmUuDQo+IA0K VGhhbmtzIGZvciB5b3VyIHJlbWluZGluZy4gSXQncyBiZXR0ZXIgdG8gYWRkIGEgZmV3IHdvcmRz IG9mIGNoYW5nZWxvZy4NCg0KUXVhbg0KX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVu Lm9yZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK