From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH v7 1/2] VT-d: Reduce spin timeout to 1ms, which can be boot-time changed Date: Thu, 17 Mar 2016 02:13:53 -0600 Message-ID: <56EA755102000078000DD997@prv-mh.provo.novell.com> References: <1458198767-61293-1-git-send-email-quan.xu@intel.com> <1458198767-61293-2-git-send-email-quan.xu@intel.com> <945CA011AD5F084CBEA3E851C0AB28894B866025@SHSMSX101.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <945CA011AD5F084CBEA3E851C0AB28894B866025@SHSMSX101.ccr.corp.intel.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Quan Xu Cc: "dario.faggioli@citrix.com" , Feng Wu , Kevin Tian , "xen-devel@lists.xen.org" List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDE3LjAzLjE2IGF0IDA5OjExLCA8cXVhbi54dUBpbnRlbC5jb20+IHdyb3RlOgo+IE9u IE1hcmNoIDE3LCAyMDE2IDM6NDVwbSwgVGlhbiwgS2V2aW4gPGtldmluLnRpYW5AaW50ZWwuY29t PiB3cm90ZToKPj4gPiBGcm9tOiBYdSwgUXVhbgo+PiA+IFNlbnQ6IFRodXJzZGF5LCBNYXJjaCAx NywgMjAxNiAzOjEzIFBNIGRpZmYgLS1naXQKPj4gPiBhL3hlbi9kcml2ZXJzL3Bhc3N0aHJvdWdo L3Z0ZC9xaW52YWwuYwo+PiA+IGIveGVuL2RyaXZlcnMvcGFzc3Rocm91Z2gvdnRkL3FpbnZhbC5j Cj4+ID4gaW5kZXggYjgxYjBiZC4uMzdhMTVmYiAxMDA2NDQKPj4gPiAtLS0gYS94ZW4vZHJpdmVy cy9wYXNzdGhyb3VnaC92dGQvcWludmFsLmMKPj4gPiArKysgYi94ZW4vZHJpdmVycy9wYXNzdGhy b3VnaC92dGQvcWludmFsLmMKPj4gPiBAQCAtMjgsNiArMjgsMTEgQEAKPj4gPiAgI2luY2x1ZGUg InZ0ZC5oIgo+PiA+ICAjaW5jbHVkZSAiZXh0ZXJuLmgiCj4+ID4KPj4gPiArc3RhdGljIHVuc2ln bmVkIGludCBfX3JlYWRfbW9zdGx5IHZ0ZF9xaV90aW1lb3V0ID0gMTsKPj4gPiAraW50ZWdlcl9w YXJhbSgidnRkX3FpX3RpbWVvdXQiLCB2dGRfcWlfdGltZW91dCk7Cj4+ID4gKwo+PiA+ICsjZGVm aW5lIElPTU1VX1FJX1RJTUVPVVQgKHZ0ZF9xaV90aW1lb3V0ICogTUlMTElTRUNTKDEpKQo+PiA+ ICsKPj4gPiAgc3RhdGljIHZvaWQgcHJpbnRfcWlfcmVncyhzdHJ1Y3QgaW9tbXUgKmlvbW11KSAg ewo+PiA+ICAgICAgdTY0IHZhbDsKPj4gPiBAQCAtMTMwLDEwICsxMzUsMTQgQEAgc3RhdGljIHZv aWQgcXVldWVfaW52YWxpZGF0ZV9pb3RsYihzdHJ1Y3QgaW9tbXUKPj4gKmlvbW11LAo+PiA+ICAg ICAgc3Bpbl91bmxvY2tfaXJxcmVzdG9yZSgmaW9tbXUtPnJlZ2lzdGVyX2xvY2ssIGZsYWdzKTsg IH0KPj4gPgo+PiA+ICsvKgo+PiA+ICsgKiBOQi4gV2UgbXVzdCBjaGVjayBhbGwga2luZHMgb2Yg ZXJyb3IgYW5kIGFsbCB0aGUgd2F5IHVwIHRoZQo+PiA+ICsgKiBjYWxsIHRyZWVzLgo+PiA+ICsg Ki8KPj4gCj4+IFRoaXMgY29tbWVudCBpcyBtZWFuaW5nbGVzcyBwdXQgaW4gdGhlIGNvZGUuIEl0 IGp1c3QgcmVmbGVjdHMgd2hhdCB5b3UgbmVlZCAKPiBkbwo+PiB0byBwdXNoIHRoZSB3aG9sZSBw YXRjaCBzZXJpZXMsIGJ1dCBpdCdzIG9idmlvdXMgYSBzdHJhaWdodGZvcndhcmQgCj4gcmVxdWly ZW1lbnQuCj4+IAo+IEtldmluLAo+IFRoaXMgaXMgZm9yIEphbiByZXF1aXJlbWVudDoKPiAgICAg ICAgICAgCj4gaHR0cDovL2xpc3RzLnhlbnByb2plY3Qub3JnL2FyY2hpdmVzL2h0bWwveGVuLWRl dmVsLzIwMTYtMDIvbXNnMDIzODguaHRtbCAKPiBKYW4gc2FpZDogCj4gIiIiIFdpdGhvdXQgYSBf X211c3RfY2hlY2sgYW5ub3RhdGlvbiBvbiB0aGUgZnVuY3Rpb24gSSBjYW5ub3Qgc2VlCj4gaG93 IEkgc2hvdWxkIHJlYXNvbmFibHkgY29udmluY2UgbXlzZWxmIHRoYXQgYWxsIGNhbGwgc2l0ZXMg bm93Cj4gaGFuZGxlIHN1Y2ggYW4gZXJyb3IgaW4gb25lIHdheSBvciBhbm90aGVyLiIiIgo+IAo+ IE5vdyBJIHRoaW5rIEkgbWlzdW5kZXJzdG9vZCB3aGF0IEphbiBzYWlkLiBJdCBtYXkgYmU6Cj4g Cj4gKyBzdGF0aWMgaW50IF9fbXVzdF9jaGVjayBxdWV1ZV9pbnZhbGlkYXRlX3dhaXQoc3RydWN0 IGlvbW11ICppb21tdSwgdTggCj4gaWZsYWcsIHU4IHN3LCB1OCBmbikKPiAKPiBJIGZvdW5kIHRo YXQgdGhlcmUgaXMgYSAnX19tdXN0X2NoZWNrJyBpbiB4ZW4gY29kZS4KCkluZGVlZCB0aGF0J3Mg d2hhdCBJIG1lYW50LgoKSmFuCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9y ZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK