From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eu-smtp-delivery-151.mimecast.com (eu-smtp-delivery-151.mimecast.com [185.58.86.151]) (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 63D5D83CB8 for ; Fri, 3 May 2024 21:11:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.58.86.151 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714770693; cv=none; b=SLuZNJmzxMrAIGog9avxwWScipV6WXYmOA1zDrFublRlWHLxBvFKHWBrAx30lAxK3knT54UUzix8047t0gHRKoYJ128o87zsP4wi9ENlurJOgba4nVgh5vGv0g/4bbzBXXE04T9q8TlPFrXg3M2vxFOsX2WrpXTDJ7FKeN0SlYY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714770693; c=relaxed/simple; bh=GQMl/ZMjQH+yE6pO5lv00tf82rh65qrvDhQORINV/U8=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: MIME-Version:Content-Type; b=Fb3I0WzWPun2KvqCBeOvjmrvR6VFP3gFRW9/g57iRQ16Hvl6xlHvfubXdM/0T4gduId6gli4BrwC44W9+iH2FE3ZhLL9346Zt08TvynZwQJ1HAKAkABWFcbgyxcTWA9NSsvv9MYMS3K0UfR16ge9CZfm7fSfJU2ZzFHK9xEWiPc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ACULAB.COM; spf=pass smtp.mailfrom=aculab.com; arc=none smtp.client-ip=185.58.86.151 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=ACULAB.COM Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=aculab.com 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-241-Q1lJQQW8PeWRE9Y4W_F7wg-1; Fri, 03 May 2024 22:11:20 +0100 X-MC-Unique: Q1lJQQW8PeWRE9Y4W_F7wg-1 Received: from AcuMS.Aculab.com (10.202.163.6) by AcuMS.aculab.com (10.202.163.6) with Microsoft SMTP Server (TLS) id 15.0.1497.48; Fri, 3 May 2024 22:10:53 +0100 Received: from AcuMS.Aculab.com ([::1]) by AcuMS.aculab.com ([::1]) with mapi id 15.00.1497.048; Fri, 3 May 2024 22:10:53 +0100 From: David Laight To: 'Waiman Long' , "'linux-kernel@vger.kernel.org'" , "'peterz@infradead.org'" CC: "'mingo@redhat.com'" , "'will@kernel.org'" , "'boqun.feng@gmail.com'" , "'Linus Torvalds'" , "'virtualization@lists.linux-foundation.org'" , 'Zeng Heng' Subject: RE: [PATCH next v2 5/5] locking/osq_lock: Optimise decode_cpu() and per_cpu_ptr(). Thread-Topic: [PATCH next v2 5/5] locking/osq_lock: Optimise decode_cpu() and per_cpu_ptr(). Thread-Index: Ado8NCf0vtha6NqURtGgfE7//QxHexhPrXlAAAq+3cA= Date: Fri, 3 May 2024 21:10:53 +0000 Message-ID: References: <2b4e8a5816a742d2bd23fdbaa8498e80@AcuMS.aculab.com> <7c1148fe64fb46a7a81c984776cd91df@AcuMS.aculab.com> <9d4024ba-6422-4775-b934-bfa80a72a858@redhat.com> <16557e30-8353-4cd1-995b-23ec763d2b07@redhat.com> In-Reply-To: <16557e30-8353-4cd1-995b-23ec763d2b07@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: linux-kernel@vger.kernel.org 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 RnJvbTogV2FpbWFuIExvbmcNCj4gU2VudDogMDMgTWF5IDIwMjQgMTc6MDANCi4uLg0KPiBEYXZp ZCwNCj4gDQo+IENvdWxkIHlvdSByZXNwaW4gdGhlIHNlcmllcyBiYXNlZCBvbiB0aGUgbGF0ZXN0 IHVwc3RyZWFtIGNvZGU/DQoNCkkndmUganVzdCByZWFwcGxpZWQgdGhlIHBhdGNoZXMgdG8gJ21h c3RlcicgYW5kIHRoZXkgYWxsIGFwcGx5DQpjbGVhbmx5IGFuZCBkaWZmaW5nIHRoZSBuZXcgcGF0 Y2hlcyB0byB0aGUgb2xkIG9uZXMgZ2l2ZXMgbm8gZGlmZmVyZW5jZXMuDQpTbyBJIHRoaW5rIHRo ZXkgc2hvdWxkIHN0aWxsIGFwcGx5Lg0KDQpXZXJlIHlvdSBzZWVpbmcgYSBzcGVjaWZpYyBwcm9i bGVtPw0KDQpJIGRvbid0IHJlbWVtYmVyIGFueSBzdWdnZXN0ZWQgY2hhbmdlZCBlaXRoZXIuDQoo QXBhcnQgZnJvbSBhIHZlcnkgbG9jYWwgdmFyaWFibGUgSSB1c2VkIHRvIGtlZXAgYSBwYXRjaCBp c29sYXRlZC4pDQoNCglEYXZpZA0KDQotDQpSZWdpc3RlcmVkIEFkZHJlc3MgTGFrZXNpZGUsIEJy YW1sZXkgUm9hZCwgTW91bnQgRmFybSwgTWlsdG9uIEtleW5lcywgTUsxIDFQVCwgVUsNClJlZ2lz dHJhdGlvbiBObzogMTM5NzM4NiAoV2FsZXMpDQo=