From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 298BA8F48 for ; Sun, 31 Dec 2023 10:37:07 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 9D0B86076C for ; Sun, 31 Dec 2023 10:37:07 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp3.osuosl.org 9D0B86076C X-Virus-Scanned: amavisd-new at osuosl.org X-Spam-Flag: NO X-Spam-Score: -1.898 X-Spam-Level: Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BtqrAg1t_JNY for ; Sun, 31 Dec 2023 10:37:06 +0000 (UTC) Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.86.151]) by smtp3.osuosl.org (Postfix) with ESMTPS id 6E5B660769 for ; Sun, 31 Dec 2023 10:37:06 +0000 (UTC) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp3.osuosl.org 6E5B660769 Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) by relay.mimecast.com with ESMTP with both STARTTLS and AUTH (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id uk-mta-167-hl52G5dpPUiy9gyuEPsLjw-1; Sun, 31 Dec 2023 10:37:02 +0000 X-MC-Unique: hl52G5dpPUiy9gyuEPsLjw-1 Received: from AcuMS.Aculab.com (10.202.163.4) by AcuMS.aculab.com (10.202.163.4) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Sun, 31 Dec 2023 10:36:43 +0000 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.048; Sun, 31 Dec 2023 10:36:42 +0000 From: David Laight To: 'Waiman Long' , 'Ingo Molnar' CC: "'linux-kernel@vger.kernel.org'" , "'peterz@infradead.org'" , "'mingo@redhat.com'" , "'will@kernel.org'" , "'boqun.feng@gmail.com'" , 'Linus Torvalds' , "'xinhui.pan@linux.vnet.ibm.com'" , "'virtualization@lists.linux-foundation.org'" , 'Zeng Heng' Subject: RE: [PATCH next 4/5] locking/osq_lock: Optimise per-cpu data accesses. Thread-Topic: [PATCH next 4/5] locking/osq_lock: Optimise per-cpu data accesses. Thread-Index: Ado6mZUJWFdx4PkETd+mn/PWVjPd0AAdwkAdAABoNTAAIPHkAAAPh8wQ Date: Sun, 31 Dec 2023 10:36:42 +0000 Message-ID: <2241a2a53f48448c9fb435f893444cd7@AcuMS.aculab.com> References: <73a4b31c9c874081baabad9e5f2e5204@AcuMS.aculab.com> <346c40b5-686f-461e-a1e3-9f255418efb2@redhat.com> <4b9da867c24f4ff990851050c8f61515@AcuMS.aculab.com> <910ac70a-5503-4594-b5b2-b2ba86bf8435@redhat.com> In-Reply-To: <910ac70a-5503-4594-b5b2-b2ba86bf8435@redhat.com> Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 RnJvbTogV2FpbWFuIExvbmcNCj4gU2VudDogMzEgRGVjZW1iZXIgMjAyMyAwMzowNA0KLi4uLg0K PiBUaGUgcHJlc2VuY2Ugb2YgZGVidWdfc21wX3Byb2Nlc3Nvcl9pZCBpbiB5b3VyIGNvbXBpbGVk IGNvZGUgaXMgbGlrZWx5DQo+IGR1ZSB0byB0aGUgc2V0dGluZyBvZiBDT05GSUdfREVCVUdfUFJF RU1QVCBpbiB5b3VyIGtlcm5lbCBjb25maWcuDQo+IA0KPiAjaWZkZWYgQ09ORklHX0RFQlVHX1BS RUVNUFQNCj4gIMKgIGV4dGVybiB1bnNpZ25lZCBpbnQgZGVidWdfc21wX3Byb2Nlc3Nvcl9pZCh2 b2lkKTsNCj4gIyBkZWZpbmUgc21wX3Byb2Nlc3Nvcl9pZCgpIGRlYnVnX3NtcF9wcm9jZXNzb3Jf aWQoKQ0KPiAjZWxzZQ0KPiAjIGRlZmluZSBzbXBfcHJvY2Vzc29yX2lkKCkgX19zbXBfcHJvY2Vz c29yX2lkKCkNCj4gI2VuZGlmDQo+IA0KPiBJIGRvbid0IGhhdmUgdGhhdCBjb25maWcgZW50cnkg aW4gbXkga2VybmVsIGNvbmZpZyBhbmQgc28gSSBvbmx5IGdldCAyDQo+IGluc3RydWN0aW9ucyBm b3IgdGhpc19jcHVfcHRyKCkuIFdlIGFyZSBub3QgZ29pbmcgdG8gb3B0aW1pemUgdGhlIGNvZGUN Cj4gc3BlY2lmaWNhbGx5IGZvciBDT05GSUdfREVCVUdfUFJFRU1QVCBhbmQgc28gdGhpcyBwYXRj aCBzaG91bGQgYmUgZHJvcHBlZC4NCg0KWWVzLCBJIGRpc2NvdmVyZWQgdGhhdCBsYXRlIGxhc3Qg bmlnaHQuDQpJJ3ZlIG5vIGlkZWEgd2h5IGl0IGlzIHNldC4NCkl0IG1pZ2h0IGV2ZW4gYmUgaW5o ZXJpdGVkIGZyb20gdGhlIHVidW50dSAxOC4wNCAoSSB0aGluaykgLmNvbmZpZw0KSSBzdGFydGVk IHdpdGggKG1vc3RseSByZW1vdmluZyBleHRyYSBtb2R1bGVzIHRvIHJlZHVjZSBjb21waWxlDQp0 aW1lIGFuZCB0aGUgc2l6ZSBvZiB1cmFtZGlzaykuDQoNCkknbGwgbG9vayBhdCB0aGUgcGF0Y2hl cyBhZ2Fpbi4NClNhdmluZyBub2RlLT5wcmV2LT5jcHUgYXMgbm9kZS0+cHJldl9jcHUgd2lsbCBk ZWZpbml0ZWx5IHNhdmUNCnRoZSBjYWNoZS1saW5lIGJvdW5jZS4NCg0KCURhdmlkDQoNCi0NClJl Z2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0 b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykN Cg==