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spf=none smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1igoQp-0005AJ-M7; Mon, 16 Dec 2019 11:20:55 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1igoQo-0005AB-6S for xen-devel@lists.xenproject.org; Mon, 16 Dec 2019 11:20:54 +0000 X-Inumbo-ID: 19f07d30-1ff6-11ea-b6f1-bc764e2007e4 Received: from mx1.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 19f07d30-1ff6-11ea-b6f1-bc764e2007e4; Mon, 16 Dec 2019 11:20:45 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id F0BC0AD66; Mon, 16 Dec 2019 11:20:43 +0000 (UTC) To: =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= References: <1576277282-6590-1-git-send-email-igor.druzhinin@citrix.com> <1576277282-6590-3-git-send-email-igor.druzhinin@citrix.com> <20191216100058.GM11756@Air-de-Roger> From: Jan Beulich Message-ID: Date: Mon, 16 Dec 2019 12:21:09 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: <20191216100058.GM11756@Air-de-Roger> Content-Language: en-US Subject: Re: [Xen-devel] [PATCH 2/2] x86/time: update vtsc_last with cmpxchg and drop vtsc_lock X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Igor Druzhinin , andrew.cooper3@citrix.com, wl@xen.org, xen-devel@lists.xenproject.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" T24gMTYuMTIuMjAxOSAxMTowMCwgUm9nZXIgUGF1IE1vbm7DqSB3cm90ZToKPiBPbiBGcmksIERl YyAxMywgMjAxOSBhdCAxMDo0ODowMlBNICswMDAwLCBJZ29yIERydXpoaW5pbiB3cm90ZToKPj4g Tm93IHRoYXQgdnRzY19sYXN0IGlzIHRoZSBvbmx5IGVudGl0eSBwcm90ZWN0ZWQgYnkgdnRzY19s b2NrIHdlIGNhbgo+PiBzaW1wbHkgdXBkYXRlIGl0IHVzaW5nIGEgc2luZ2xlIGF0b21pYyBvcGVy YXRpb24gYW5kIGRyb3AgdGhlIHNwaW5sb2NrCj4+IGVudGlyZWx5LiBUaGlzIGlzIGV4dHJlbWVs eSBpbXBvcnRhbnQgZm9yIHRoZSBjYXNlIG9mIHJ1bm5pbmcgbmVzdGVkCj4+IChlLmcuIHNoaW0g aW5zdGFuY2Ugd2l0aCBsb3RzIG9mIHZDUFVzIGFzc2lnbmVkKSBzaW5jZSBpZiBwcmVlbXB0aW9u Cj4+IGhhcHBlbnMgc29tZXdoZXJlIGluc2lkZSB0aGUgY3JpdGljYWwgc2VjdGlvbiB0aGF0IHdv dWxkIGltbWVkaWF0ZWx5Cj4+IG1lYW4gdGhhdCBvdGhlciB2Q1BVIHN0b3AgcHJvZ3Jlc3Npbmcg KGFuZCBwcm9iYWJseSBiZWluZyBwcmVlbXB0ZWQKPj4gYXMgd2VsbCkgd2FpdGluZyBmb3IgdGhl IHNwaW5sb2NrIHRvIGJlIGZyZWVkLgo+Pgo+PiBUaGlzIGZpeGVzIGNvbnN0YW50IHNoaW0gZ3Vl c3QgYm9vdCBsb2NrdXBzIHdpdGggfjMyIHZDUFVzIGlmIHRoZXJlIGlzCj4+IHZDUFUgb3ZlcmNv bW1pdCBwcmVzZW50ICh3aGljaCBpbmNyZWFzZXMgdGhlIGxpa2VsaWhvb2Qgb2YgcHJlZW1wdGlv bikuCj4+Cj4+IFNpZ25lZC1vZmYtYnk6IElnb3IgRHJ1emhpbmluIDxpZ29yLmRydXpoaW5pbkBj aXRyaXguY29tPgo+PiAtLS0KPj4gIHhlbi9hcmNoL3g4Ni9kb21haW4uYyAgICAgICAgfCAgMSAt Cj4+ICB4ZW4vYXJjaC94ODYvdGltZS5jICAgICAgICAgIHwgMTYgKysrKysrLS0tLS0tLS0tLQo+ PiAgeGVuL2luY2x1ZGUvYXNtLXg4Ni9kb21haW4uaCB8ICAxIC0KPj4gIDMgZmlsZXMgY2hhbmdl ZCwgNiBpbnNlcnRpb25zKCspLCAxMiBkZWxldGlvbnMoLSkKPj4KPj4gZGlmZiAtLWdpdCBhL3hl bi9hcmNoL3g4Ni9kb21haW4uYyBiL3hlbi9hcmNoL3g4Ni9kb21haW4uYwo+PiBpbmRleCBiZWQx OWZjLi45NDUzMWJlIDEwMDY0NAo+PiAtLS0gYS94ZW4vYXJjaC94ODYvZG9tYWluLmMKPj4gKysr IGIveGVuL2FyY2gveDg2L2RvbWFpbi5jCj4+IEBAIC01MzksNyArNTM5LDYgQEAgaW50IGFyY2hf ZG9tYWluX2NyZWF0ZShzdHJ1Y3QgZG9tYWluICpkLAo+PiAgICAgIElOSVRfUEFHRV9MSVNUX0hF QUQoJmQtPmFyY2gucmVsbWVtX2xpc3QpOwo+PiAgCj4+ICAgICAgc3Bpbl9sb2NrX2luaXQoJmQt PmFyY2guZTgyMF9sb2NrKTsKPj4gLSAgICBzcGluX2xvY2tfaW5pdCgmZC0+YXJjaC52dHNjX2xv Y2spOwo+PiAgCj4+ICAgICAgLyogTWluaW1hbCBpbml0aWFsaXNhdGlvbiBmb3IgdGhlIGlkbGUg ZG9tYWluLiAqLwo+PiAgICAgIGlmICggdW5saWtlbHkoaXNfaWRsZV9kb21haW4oZCkpICkKPj4g ZGlmZiAtLWdpdCBhL3hlbi9hcmNoL3g4Ni90aW1lLmMgYi94ZW4vYXJjaC94ODYvdGltZS5jCj4+ IGluZGV4IDIxNjE2OWEuLjIwMjQ0NmYgMTAwNjQ0Cj4+IC0tLSBhL3hlbi9hcmNoL3g4Ni90aW1l LmMKPj4gKysrIGIveGVuL2FyY2gveDg2L3RpbWUuYwo+PiBAQCAtMjEzMCwxOSArMjEzMCwxNSBA QCB1NjQgZ3RzY190b19ndGltZShzdHJ1Y3QgZG9tYWluICpkLCB1NjQgdHNjKQo+PiAgCj4+ICB1 aW50NjRfdCBwdl9zb2Z0X3JkdHNjKGNvbnN0IHN0cnVjdCB2Y3B1ICp2LCBjb25zdCBzdHJ1Y3Qg Y3B1X3VzZXJfcmVncyAqcmVncykKPj4gIHsKPj4gLSAgICBzX3RpbWVfdCBub3cgPSBnZXRfc190 aW1lKCk7Cj4+ICsgICAgc190aW1lX3Qgb2xkLCBuZXcsIG5vdyA9IGdldF9zX3RpbWUoKTsKPj4g ICAgICBzdHJ1Y3QgZG9tYWluICpkID0gdi0+ZG9tYWluOwo+PiAgCj4+IC0gICAgc3Bpbl9sb2Nr KCZkLT5hcmNoLnZ0c2NfbG9jayk7Cj4+IC0KPj4gLSAgICBpZiAoIChpbnQ2NF90KShub3cgLSBk LT5hcmNoLnZ0c2NfbGFzdCkgPiAwICkKPj4gLSAgICAgICAgZC0+YXJjaC52dHNjX2xhc3QgPSBu b3c7Cj4+IC0gICAgZWxzZQo+PiAtICAgICAgICBub3cgPSArK2QtPmFyY2gudnRzY19sYXN0Owo+ PiAtCj4+IC0gICAgc3Bpbl91bmxvY2soJmQtPmFyY2gudnRzY19sb2NrKTsKPj4gKyAgICBkbyB7 Cj4+ICsgICAgICAgIG9sZCA9IGQtPmFyY2gudnRzY19sYXN0Owo+PiArICAgICAgICBuZXcgPSAo aW50NjRfdCkobm93IC0gZC0+YXJjaC52dHNjX2xhc3QpID4gMCA/IG5vdyA6IG9sZCArIDE7Cj4g Cj4gV2h5IGRvIHlvdSBuZWVkIHRvIGRvIHRoaXMgc3VidHJhY3Rpb24/IElzbid0IGl0IGVhc2ll ciB0byBqdXN0IGRvOgo+IAo+IG5ldyA9IG5vdyA+IGQtPmFyY2gudnRzY19sYXN0ID8gbm93IDog b2xkICsgMTsKClRoaXMgd291bGRuJ3QgYmUgcmVsaWFibGUgd2hlbiB0aGUgVFNDIHdyYXBzLiBS ZW1lbWJlciB0aGF0IGZpcm13YXJlCm1heSBzZXQgdGhlIFRTQywgYW5kIGl0IGhhcyBiZWVuIHNl ZW4gdG8gYmUgc2V0IHRvIHZlcnkgbGFyZ2UKKGVmZmVjdGl2ZWx5IG5lZ2F0aXZlLCBpZiB0aGV5 IHdlcmUgc2lnbmVkIHF1YW50aXRpZXMpIHZhbHVlcywgd2hpY2gKd2lsbCB0aGVuIGV2ZW50dWFs bHkgd3JhcCAod2hlcmVhcyB3ZSdyZSBub3QgdHlwaWNhbGx5IGNvbmNlcm5lZCBvZgo2NC1iaXQg Y291bnRlcnMgd3JhcHBpbmcgd2hlbiB0aGV5IHN0YXJ0IGZyb20gemVybykuCgpKYW4KCl9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWls aW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVu cHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=