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 6966EC76192 for ; Tue, 16 Jul 2019 15:59:02 +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 3E3C820880 for ; Tue, 16 Jul 2019 15:59:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="KIjL4mhn" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3E3C820880 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=WopwJxuUcxQ1FmMB5KG558pGZuvM3Awt9ns1MBJLZZQ=; b=KIjL4mhnyCVESk zgNeo7L8Jj8PCwh9pKnU+feLpBJBml2eQg8ccD4q4MPEvMbWhVG7VngqskuGSrxeCHzLUrRXWaaSB Cvejl9u8qUW8CiPc+CXjo1GA50vYehKttkcJnYlgddxOmML2ucbZ0cWn81YYPPxpAwqLFZhtsCfk6 1UANQ6Hjzmd8tEpz9gVBYz7cZpusaKogFsaATNK1BBKPjC/ph9FKTsmIQRVDgOOJK/u8lEMTYlim3 rCyD9Icn4cy2jsg4jhrBT87okAze5yuKIcsPT6B3G3EhTXcjNr4L12OcoVDA7CXbAou0aR4BXB83t ejYtUzOz7Iqf0a0AEXUA==; 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 1hnPr2-00014j-Rb; Tue, 16 Jul 2019 15:59:00 +0000 Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hnPqj-0000xJ-1S; Tue, 16 Jul 2019 15:58:41 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 61DFF2059DEA3; Tue, 16 Jul 2019 17:58:39 +0200 (CEST) Date: Tue, 16 Jul 2019 17:58:39 +0200 From: Peter Zijlstra To: Alex Kogan Subject: Re: [PATCH v3 2/5] locking/qspinlock: Refactor the qspinlock slow path Message-ID: <20190716155839.GF3402@hirez.programming.kicks-ass.net> References: <20190715192536.104548-1-alex.kogan@oracle.com> <20190715192536.104548-3-alex.kogan@oracle.com> <20190716102034.GN3419@hirez.programming.kicks-ass.net> <9D5B6F33-6003-4CCA-BBE5-998B5A679B9C@oracle.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <9D5B6F33-6003-4CCA-BBE5-998B5A679B9C@oracle.com> 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 T24gVHVlLCBKdWwgMTYsIDIwMTkgYXQgMTA6NTM6MDJBTSAtMDQwMCwgQWxleCBLb2dhbiB3cm90 ZToKPiBPbiBKdWwgMTYsIDIwMTksIGF0IDY6MjAgQU0sIFBldGVyIFppamxzdHJhIDxwZXRlcnpA aW5mcmFkZWFkLm9yZz4gd3JvdGU6Cj4gPiAKPiA+IE9uIE1vbiwgSnVsIDE1LCAyMDE5IGF0IDAz OjI1OjMzUE0gLTA0MDAsIEFsZXggS29nYW4gd3JvdGU6Cj4gPiAKPiA+PiArLyoKPiA+PiArICog c2V0X2xvY2tlZF9lbXB0eV9tY3MgLSBUcnkgdG8gc2V0IHRoZSBzcGlubG9jayB2YWx1ZSB0byBf UV9MT0NLRURfVkFMLAo+ID4+ICsgKiBhbmQgYnkgZG9pbmcgdGhhdCB1bmxvY2sgdGhlIE1DUyBs b2NrIHdoZW4gaXRzIHdhaXRpbmcgcXVldWUgaXMgZW1wdHkKPiA+PiArICogQGxvY2s6IFBvaW50 ZXIgdG8gcXVldWVkIHNwaW5sb2NrIHN0cnVjdHVyZQo+ID4+ICsgKiBAdmFsOiBDdXJyZW50IHZh bHVlIG9mIHRoZSBsb2NrCj4gPj4gKyAqIEBub2RlOiBQb2ludGVyIHRvIHRoZSBNQ1Mgbm9kZSBv ZiB0aGUgbG9jayBob2xkZXIKPiA+PiArICoKPiA+PiArICogKiwqLCogLT4gMCwwLDEKPiA+PiAr ICovCj4gPj4gK3N0YXRpYyBfX2Fsd2F5c19pbmxpbmUgYm9vbCBfX3NldF9sb2NrZWRfZW1wdHlf bWNzKHN0cnVjdCBxc3BpbmxvY2sgKmxvY2ssCj4gPj4gKwkJCQkJCSAgIHUzMiB2YWwsCj4gPj4g KwkJCQkJCSAgIHN0cnVjdCBtY3Nfc3BpbmxvY2sgKm5vZGUpCj4gPj4gK3sKPiA+PiArCXJldHVy biBhdG9taWNfdHJ5X2NtcHhjaGdfcmVsYXhlZCgmbG9jay0+dmFsLCAmdmFsLCBfUV9MT0NLRURf VkFMKTsKPiA+PiArfQo+ID4gCj4gPiBUaGF0IG5hbWUgaXMgbm9uc2Vuc2UuIEl0IHNob3VsZCBi ZSBzb21ldGhpbmcgbGlrZToKPiA+IAo+ID4gc3RhdGljIF9fYWx3YXlzX2lubGluZSBib29sIF9f dHJ5X2NsZWFyX3RhaWwo4oCmKQo+IAo+IFdlIGFscmVhZHkgaGF2ZSBzZXRfbG9ja2VkKCksIHNv IEkgd2FzIHRyeWluZyB0byBjb252ZXkgdGhlIGZhY3QgdGhhdCB3ZSBhcmUKPiBkb2luZyB0aGUg c2FtZSBoZXJlLCBidXQgb25seSB3aGVuIHRoZSBNQ1MgY2hhaW4gaXMgZW1wdHkuCj4gCj4gSSBj YW4gdXNlIF9fdHJ5X2NsZWFyX3RhaWwoKSBpbnN0ZWFkLgoKVGhpbmcgaXMsIHdlIGdvIGludG8g dGhpcyBmdW5jdGlvbiB3aXRoOiAqLDAsMSBhbmQgYXJlIHRyeWluZyB0byBvYnRhaW4KMCwwLDEu IElPVywgd2UncmUgdHJ5aW5nIHRvIGNsZWFyIHRoZSB0YWlsLCB3aGlsZSBwcmVzZXJ2aW5nIHBl bmRpbmcgYW5kCmxvY2tlZC4KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxA bGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xp c3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK