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[209.132.180.67]) by mx.google.com with ESMTP id g92-v6si1956739plg.445.2018.09.27.05.15.39; Thu, 27 Sep 2018 05:15:55 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727402AbeI0ScI (ORCPT + 99 others); Thu, 27 Sep 2018 14:32:08 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([146.101.78.151]:25965 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727111AbeI0ScI (ORCPT ); Thu, 27 Sep 2018 14:32:08 -0400 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by eu-smtp-1.mimecast.com with ESMTP id uk-mta-63-qJDPQ7bwPhSZo1HHX5j1uw-1; Thu, 27 Sep 2018 13:14:01 +0100 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Thu, 27 Sep 2018 13:16:14 +0100 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Thu, 27 Sep 2018 13:16:14 +0100 From: David Laight To: 'Peter Zijlstra' , "will.deacon@arm.com" , "mingo@kernel.org" CC: "linux-kernel@vger.kernel.org" , "longman@redhat.com" , "andrea.parri@amarulasolutions.com" , "tglx@linutronix.de" Subject: RE: [RFC][PATCH 3/3] locking/qspinlock: Optimize for x86 Thread-Topic: [RFC][PATCH 3/3] locking/qspinlock: Optimize for x86 Thread-Index: AQHUVYyUJvkbcmqKIk6EOuUB7ALKyaUD9acw Date: Thu, 27 Sep 2018 12:16:14 +0000 Message-ID: References: <20180926110117.405325143@infradead.org> <20180926111307.513429499@infradead.org> In-Reply-To: <20180926111307.513429499@infradead.org> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 X-MC-Unique: qJDPQ7bwPhSZo1HHX5j1uw-1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogUGV0ZXIgWmlqbHN0cmENCj4gU2VudDogMjYgU2VwdGVtYmVyIDIwMTggMTI6MDENCj4g DQo+IE9uIHg4NiB3ZSBjYW5ub3QgZG8gZmV0Y2hfb3Igd2l0aCBhIHNpbmdsZSBpbnN0cnVjdGlv biBhbmQgZW5kIHVwDQo+IHVzaW5nIGEgY21weGNoZyBsb29wLCB0aGlzIHJlZHVjZXMgZGV0ZXJt aW5pc20uIFJlcGxhY2UgdGhlIGZldGNoX29yDQo+IHdpdGggYSB2ZXJ5IHRyaWNreSBjb21wb3Np dGUgeGNoZzggKyBsb2FkLg0KPiANCj4gVGhlIGJhc2ljIGlkZWEgaXMgdGhhdCB3ZSB1c2UgeGNo ZzggdG8gdGVzdC1hbmQtc2V0IHRoZSBwZW5kaW5nIGJpdA0KPiAod2hlbiBpdCBpcyBhIGJ5dGUp IGFuZCB0aGVuIGEgbG9hZCB0byBmZXRjaCB0aGUgd2hvbGUgd29yZC4gVXNpbmcNCj4gdHdvIGlu c3RydWN0aW9ucyBvZiBjb3Vyc2Ugb3BlbnMgYSB3aW5kb3cgd2UgcHJldmlvdXNseSBkaWQgbm90 IGhhdmUuDQouLi4NCg0KSUlSQyB0aGUgbG9hZCB3aWxsIGJlICdzbG93JyBiZWNhdXNlIGl0IHdp bGwgaGF2ZSB0byB3YWl0IGZvciB0aGUNCmVhcmxpZXIgc3RvcmUgdG8gYWN0dWFsbHkgY29tcGxl dGUgLSByYXRoZXIgdGhhbiBiZWluZyBzYXRpc2ZpZWQNCmJ5IGRhdGEgZnJvbSB0aGUgc3RvcmUg YnVmZmVyIChiZWNhdXNlIHRoZSB3aWR0aHMgYXJlIGRpZmZlcmVudCkuDQoNClRoaXMgbWF5IG5v dCBtYXR0ZXIgZm9yIHhjaGcgPw0KDQoJRGF2aWQNCg0KLQ0KUmVnaXN0ZXJlZCBBZGRyZXNzIExh a2VzaWRlLCBCcmFtbGV5IFJvYWQsIE1vdW50IEZhcm0sIE1pbHRvbiBLZXluZXMsIE1LMSAxUFQs IFVLDQpSZWdpc3RyYXRpb24gTm86IDEzOTczODYgKFdhbGVzKQ0K