From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 63A87C7618F for ; Wed, 17 Jul 2019 15:09:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 342F121743 for ; Wed, 17 Jul 2019 15:09:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="dO0RaY8S"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="hgNH4C3m" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 342F121743 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=MAHVzrnxshuA7F/3Nkn565n/YNhReEP10CkN89Xm6Ag=; b=dO0RaY8SjiR7O9 LiVCuvKRr0XD3jdZzK4QjkM2oel1yb8CiBmNbKye+rr3UsQwrGfGZT3CX2simaRMVzm/KsiG562XD 7REcpEnL9eJVi3nf9beEWwFdYC52TFU8YpuYaFAR7QD6oa5UXlrsuhJbMqC28vDxUVS6ZSUVxRI8U KHyPyO7z2no7ZyXxDSJ+Xao/+DnUZCCr13pHcsHA2OarH+cRfiGbPhV31GI0v5OZR5yHdacgRq4Rf MLNMvYQ+QNcH+c4eSmmLbjRwIztTxhCFYriLbB8uFXlz5Y0vPGHYce9R84LIUjBW9d6apzA4dTIP0 ZkcF98lUheWjg1DN13zQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hnlYf-0003iX-LC; Wed, 17 Jul 2019 15:09:29 +0000 Received: from merlin.infradead.org ([2001:8b0:10b:1231::1]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hnlYd-0003iK-E7 for linux-arm-kernel@bombadil.infradead.org; Wed, 17 Jul 2019 15:09:27 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Transfer-Encoding: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=SVWkaeTZUofn6ExxaVIGuAizGoZUu1XC7cjSP278ehA=; b=hgNH4C3meP6H4QR8nVYYGc/a0B ChHUKb4btr0qAx6C8fV9B8xFTttU5BMmi0L6YuyZ64y1yIRegluNaML0nKc+5l/8CQuVKgI20C/OV x9sInHemezlesMlXmU075RKKJtz9YcsfHCrG6tFv0U2oLGdDXqIM2XsUQKIposBfNnkc+kQ5NFgUC PgPjZzUUQ5NquuE4WRBPEoarvydOg6GiwXe8TXmfScxRR26HP2a7l8ZcvTWI90urs1qmoa/ds2VrB 1FrwevaggTNefAgs2WpgVJcEJe9ceT7ZJNvvnX0ntVY+ZigWIRIZdPYGY4sds6P/X9/3tMIErtBLB 3VyyNAgA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hnlYR-0002yN-5C; Wed, 17 Jul 2019 15:09:15 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id DA14B20197A67; Wed, 17 Jul 2019 17:09:13 +0200 (CEST) Date: Wed, 17 Jul 2019 17:09:13 +0200 From: Peter Zijlstra To: Alex Kogan Subject: Re: [PATCH v3 3/5] locking/qspinlock: Introduce CNA into the slow path of qspinlock Message-ID: <20190717150913.GY3419@hirez.programming.kicks-ass.net> References: <20190715192536.104548-1-alex.kogan@oracle.com> <20190715192536.104548-4-alex.kogan@oracle.com> <20190716155022.GR3419@hirez.programming.kicks-ass.net> <193BBB31-F376-451F-BDE1-D4807140EB51@oracle.com> <20190716184724.GH3402@hirez.programming.kicks-ass.net> <20190717083944.GR3463@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, guohanjun@huawei.com, arnd@arndb.de, dave.dice@oracle.com, jglauber@marvell.com, x86@kernel.org, will.deacon@arm.com, linux@armlinux.org.uk, steven.sistare@oracle.com, linux-kernel@vger.kernel.org, rahul.x.yadav@oracle.com, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, longman@redhat.com, tglx@linutronix.de, daniel.m.jordan@oracle.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gV2VkLCBKdWwgMTcsIDIwMTkgYXQgMTA6Mjc6MzBBTSAtMDQwMCwgQWxleCBLb2dhbiB3cm90 ZToKPiA+IE9uIEp1bCAxNywgMjAxOSwgYXQgNDozOSBBTSwgUGV0ZXIgWmlqbHN0cmEgPHBldGVy ekBpbmZyYWRlYWQub3JnPiB3cm90ZToKCj4gPiBzdGF0aWMgdm9pZCBjbmFfc3BsaWNlX3RhaWwo c3RydWN0IGNuYV9ub2RlICpjbiwgc3RydWN0IGNuYV9ub2RlICpoZWFkLCBzdHJ1Y3QgY25hX25v ZGUgKnRhaWwpCj4gPiB7Cj4gPiAJc3RydWN0IGNuYV9ub2RlICpsaXN0Owo+ID4gCj4gPiAJLyog cmVtb3ZlIFtoZWFkLHRhaWxdICovCj4gPiAJV1JJVEVfT05DRShjbi0+bWNzLm5leHQsIHRhaWwt Pm1jcy5uZXh0KTsKPiA+IAl0YWlsLT5tY3MubmV4dCA9IE5VTEw7Cj4gPiAKPiA+IAkvKiBzdGlj ayBbaGVhZCx0YWlsXSBvbiB0aGUgc2Vjb25kYXJ5IGxpc3QgdGFpbCAqLwo+ID4gCWlmIChjbi0+ bWNzLmxvY2tlZCA8PSAxKSB7Cj4gPiAJCS8qIGNyZWF0ZSBzZWNvbmRhcnkgbGlzdCAqLwo+ID4g CQloZWFkLT50YWlsID0gdGFpbDsKPiA+IAkJY24tPm1jcy5sb2NrZWQgPSBoZWFkLT5lbmNvZGVk X3RhaWw7Cj4gPiAJfSBlbHNlIHsKPiA+IAkJLyogYWRkIHRvIHRhaWwgKi8KPiA+IAkJbGlzdCA9 IChzdHJ1Y3QgY25hX25vZGUgKilkZWNvZGVfdGFpbChjbi0+bWNzLmxvY2tlZCk7Cj4gPiAJCWxp c3QtPnRhaWwtPm5leHQgPSBoZWFkOwo+ID4gCQlsaXN0LT50YWlsID0gdGFpbDsKPiA+IAl9Cj4g PiB9Cj4gPiAKPiA+IHN0YXRpYyBzdHJ1Y3QgY25hX25vZGUgKmNuYV9maW5kX25leHQoc3RydWN0 IG1jc19zcGlubG9jayAqbm9kZSkKPiA+IHsKPiA+IAlzdHJ1Y3QgY25hX25vZGUgKmNuaSwgKmNu ID0gKHN0cnVjdCBjbmFfbm9kZSAqKW5vZGU7Cj4gPiAJc3RydWN0IGNuYV9ub2RlICpoZWFkLCAq dGFpbCA9IE5VTEw7Cj4gPiAKPiA+IAkvKiBmaW5kIGFueSBuZXh0IGxvY2sgZnJvbSAnb3VyJyBu b2RlICovCj4gPiAJZm9yIChoZWFkID0gY25pID0gKHN0cnVjdCBjbmFfbm9kZSAqKVJFQURfT05D RShjbi0+bWNzLm5leHQpOwo+ID4gCSAgICAgY25pICYmIGNuaS0+bm9kZSAhPSBjbi0+bm9kZTsK PiA+IAkgICAgIHRhaWwgPSBjbmksIGNuaSA9IChzdHJ1Y3QgY25hX25vZGUgKilSRUFEX09OQ0Uo Y25pLT5tY3MubmV4dCkpCj4gPiAJCTsKPiA+IAo+ID4gCS8qIHdoZW4gZm91bmQsIHNwbGljZSBh bnkgc2tpcHBlZCBsb2NrcyBvbnRvIHRoZSBzZWNvbmRhcnkgbGlzdCAqLwo+ID4gCWlmIChjbmkg JiYgdGFpbCkKPiA+IAkJY25hX3NwbGljZV90YWlsKGNuLCBoZWFkLCB0YWlsKTsKPiA+IAo+ID4g CXJldHVybiBjbmk7Cj4gPiB9Cj4gPiAKPiA+IEhvdydzIHRoYXQ/Cj4gCj4gVGhpcyBpcyBhbG1v c3QgcGVyZmVjdCEhIDopCj4gCj4gVGhlIGFib3ZlIHNob3VsZCB3b3JrLCBidXQgSSB0aGluayB3 ZSBzaG91bGQgaGF2ZSBhIHNwZWNpYWxpemVkIGZhc3QtcGF0aCBmb3IgCj4gY2hlY2tpbmcgdGhl IGltbWVkaWF0ZSBuZXh0IG5vZGUgaW4gdGhlIG1haW4gcXVldWUuIFRoaXMgd291bGQgYmUgdGhl IGNvbW1vbgo+IGNhc2UsIG9uY2Ugd2Ugc3BsaWNlIOKAmG90aGVy4oCZIG5vZGVzIG9udG8gdGhl IHNlY29uZGFyeSBxdWV1ZS4gSW4gdGhlIGFib3ZlIHdlCj4gd291bGQgZ28gdGhyb3VnaCBmb3Vy IGJyYW5jaGVzIGJlZm9yZSByZXR1cm5pbmcgZnJvbSBjbmFfZmluZF9uZXh0KCkuIEluIHRoZSAK PiBmb2xsb3dpbmcgd2Ugd291bGQgaGF2ZSBqdXN0IG9uZToKClJpZ2h0LCBidXQgY2FuIHlvdSBt ZWFzdXJlIGEgZGlmZmVyZW5jZT8gOy0pIEFueXdheSwgbm8gcmVhbCBvYmplY3Rpb24sCmp1c3Qg cGxheWluZyBkZXZpbHMgYWR2b2NhdGUgaGVyZS4KCj4gPiBzdGF0aWMgc3RydWN0IGNuYV9ub2Rl ICpjbmFfZmluZF9uZXh0KHN0cnVjdCBtY3Nfc3BpbmxvY2sgKm5vZGUpCj4gPiB7Cj4gPiAJc3Ry dWN0IGNuYV9ub2RlICpjbiA9IChzdHJ1Y3QgY25hX25vZGUgKilub2RlOwo+IAkgICBzdHJ1Y3Qg Y25hX25vZGUgKmNuaSA9IChzdHJ1Y3QgY25hX25vZGUgKilSRUFEX09OQ0UoY24tPm1jcy5uZXh0 KTsKPiA+IAo+ID4gCXN0cnVjdCBjbmFfbm9kZSAqaGVhZCwgKnRhaWwgPSBOVUxMOwo+ID4gCj4g CSAgIC8qIGZhc3QgcGF0aCAqLwo+IAkgICBpZiAoY25pLT5ub2RlID09IGNuLT5ub2RlKSAKPiAJ CXJldHVybiBjbmk7Cj4gCj4gPiAJLyogZmluZCBhbnkgbmV4dCBsb2NrIGZyb20gJ291cicgbm9k ZSAqLwo+ID4gCWZvciAoaGVhZCA9IGNuLT5tY3MubmV4dDsKCSAgICAgaGVhZCA9IGNuaSwKCnlv dSBqdXN0IGRpZCB0aGF0IGxvYWQgOi0pCgo+ID4gCSAgICAgY25pICYmIGNuaS0+bm9kZSAhPSBj bi0+bm9kZTsKPiA+IAkgICAgIHRhaWwgPSBjbmksIGNuaSA9IChzdHJ1Y3QgY25hX25vZGUgKilS RUFEX09OQ0UoY25pLT5tY3MubmV4dCkpCj4gPiAJCTsKPiA+IAo+ID4gCS8qIHdoZW4gZm91bmQs IHNwbGljZSBhbnkgc2tpcHBlZCBsb2NrcyBvbnRvIHRoZSBzZWNvbmRhcnkgbGlzdCAqLwo+ID4g CWlmIChjbmkgJiYgdGFpbCkKPiA+IAkJY25hX3NwbGljZV90YWlsKGNuLCBoZWFkLCB0YWlsKTsK PiA+IAo+ID4gCXJldHVybiBjbmk7Cj4gPiB9Cj4gCj4gCj4gQWxzbywgYW55IHJlYXNvbiB5b3Ug c2F5IOKAmGxvY2vigJkgaW5zdGVhZCBvZiDigJlub2Rl4oCZIGluIHRoZSBjb21tZW50cz8KPiBJ LmUuLCBJIHRoaW5rICJ3aGVuIGZvdW5kLCBzcGxpY2UgYW55IHNraXBwZWQgbG9ja3Mgb250byB0 aGUgc2Vjb25kYXJ5IGxpc3TigJ0gc2hvdWxkIGJlCj4gIndoZW4gZm91bmQsIHNwbGljZSBhbnkg c2tpcHBlZCBub2RlcyBvbnRvIHRoZSBzZWNvbmRhcnkgbGlzdOKAnS4KCkR1ZSB0byB0aGUgY29u ZnVzaW9uIGJldHdlZW4gbG9jayB3YWl0ZXIgbm9kZSBhbmQgbnVtYSBub2RlIDotKQoKX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5l bCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6 Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=