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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,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 46C1FC28CBC for ; Wed, 6 May 2020 16:52:17 +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 11780208CA for ; Wed, 6 May 2020 16:52:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="lPgySiO5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 11780208CA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=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-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=03TqQqPOaAcuyj/TGdJdO+a0rA1GINm08ZOPsDMzBug=; b=lPgySiO5GhKDBNJhpOFiRLEs2 ig2SR9RbDMdhrcIY2aVrt+HaJUAGSn3zuLtpdFaQgJ+pEu1QAxIP5YIvt0F5W+7IPLnjZeh/1p0Sd y4+aiAfS8ICRMcIDaz4OeC7a7gVl2Ioe81XXdNGrxL48L8+jBw598BjAKse7eFk5jcVrCCM/jRrxR 4BAQFo2gpWl7PxE4UTU2w1CiKOA18vp7UPUvx6K059VyEjOL/+y/S1gpU5PWlUfx9WBcZWTu+I3tW 5/3t3gF4FuM9q0rOfPekoBF63c4dwiFiu5XNfexTSHuMthtzRo1B23/BKI58f2HszY/GKvRUw4Zd6 sami5kcFA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jWNHL-0001eo-0e; Wed, 06 May 2020 16:52:15 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jWNHH-0001e4-Ju for linux-nvme@lists.infradead.org; Wed, 06 May 2020 16:52:13 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 32E291FB; Wed, 6 May 2020 09:52:09 -0700 (PDT) Received: from [10.57.39.240] (unknown [10.57.39.240]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A7CE03F71F; Wed, 6 May 2020 09:52:07 -0700 (PDT) Subject: Re: [PATCH] nvme-pci: slimmer CQ head update To: Will Deacon , John Garry References: <20200228184519.GA2281@avx2> <20200229055351.GA542920@dhcp-10-100-145-180.wdl.wdc.com> <20200506124701.GA54933@C02WT3WMHTD6> <20200506132429.GA21451@avx2> <2ecb88b5-b585-52ed-bb84-5b486868743a@huawei.com> <20200506143519.GA570@lst.de> <4155a814-798c-0c7e-5433-daf719c0345c@huawei.com> <20200506163104.GD12919@willie-the-truck> From: Robin Murphy Message-ID: <3453193c-424b-1e4c-16be-279088612c68@arm.com> Date: Wed, 6 May 2020 17:52:06 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200506163104.GD12919@willie-the-truck> Content-Language: en-GB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200506_095212_556486_EB30788E X-CRM114-Status: GOOD ( 13.40 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sagi@grimberg.me, linux-nvme@lists.infradead.org, Alexey Dobriyan , axboe@fb.com, Keith Busch , Christoph Hellwig Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org T24gMjAyMC0wNS0wNiA1OjMxIHBtLCBXaWxsIERlYWNvbiB3cm90ZToKPiBPbiBXZWQsIE1heSAw NiwgMjAyMCBhdCAwNToyNjozNVBNICswMTAwLCBKb2huIEdhcnJ5IHdyb3RlOgo+PiArIGFybTY0 IGd1eXMgKFBsZWFzZSBub3RlIFdBUk4gYmVsb3csIGdlbmVyYXRlZCB3aGVuIHRlc3RpbmcgTlZN ZSkKPj4KPj4gT24gMDYvMDUvMjAyMCAxNTozNSwgQ2hyaXN0b3BoIEhlbGx3aWcgd3JvdGU6PiBP biBXZWQsIE1heSAwNiwgMjAyMCBhdAo+PiAwMjo0NDo1MFBNICswMTAwLCBKb2huIEdhcnJ5IHdy b3RlOgo+Pj4+IEknZCByYXRoZXIgaGVhciB0aGUgbWFpbnRhaW5lcuKAmXMgb3BpbmlvbiBiZWZv cmUgYm90aGVyaW5nIHRlc3RpbmcgdGhpcy4uLgo+Pj4KPj4+IEFzIHRoZSBvdGhlciBtYWludGFp bmVyIC0gcGxlYXNlIGdpdmUgaXQgYSBzcGluLgo+Pgo+PiBvaywgc28gSSBoYXZlIHRlc3RlZCB3 aXRoIHRoZSBtb2RpZmljYXRpb24gZnJvbSBLZWl0aCAodG8gYXZvaWQgdGhlCj4+IFJFQURfT05D RSgpKSwgYW5kIGl0J3Mgb2sgZm9yIHVzZV90aHJlYWRlZF9pbnRlcnJ1cHRzPTEuCj4+Cj4+IEhv d2V2ZXIsIGZvciB1c2VfdGhyZWFkZWRfaW50ZXJydXB0cz0wLCBJIHNlZSBhIG5ldyBpc3N1ZToK Pj4KPj4gWyAgMTIyLjUyNDI5MF0gV0FSTklORzogQ1BVOiA4NiBQSUQ6IDExNTcgYXQKPj4gZHJp dmVycy9pb21tdS9pby1wZ3RhYmxlLWFybS5jOjMwNAo+IAo+IFRoYXQgbWVhbnMgeW91J3JlIHRy eWluZyB0byBtYXAgc29tZXRoaW5nIHRoYXQgaXMgYWxyZWFkeSBtYXBwZWQuCgouLi53aGljaCBp cyBhIGJpdCBvZiBhbiBhY2hpZXZlbWVudCB3aXRoIHRoZSBETUEgQVBJLCBidXQgbW9zdCBsaWtl bHkgCmltcGxpZXMgdGhhdCBhIHByaW9yIGRtYV91bm1hcCB3YXMgY2FsbGVkIHdpdGggdGhlIHdy b25nIHNpemUsIHN1Y2ggdGhhdCAKd2Ugb25seSB1bm1hcHBlZCBwYXJ0IG9mIHRoZSBJT1ZBIHJl Z2lvbiB0aGF0IGhhcyBub3cgYmVlbiByZXVzZWQuCgpKb2huLCBpZiB5b3UgY2FuIHJlcHJvZHVj ZSB0aGlzIHNlbWktcmVsaWFibHksIHRyeSB0aHJvd2luZyAKRE1BX0FQSV9ERUJVRyBhdCBpdCBp biB0aGUgZmlyc3QgaW5zdGFuY2UuCgpSb2Jpbi4KCl9fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fCmxpbnV4LW52bWUgbWFpbGluZyBsaXN0CmxpbnV4LW52bWVA bGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xp c3RpbmZvL2xpbnV4LW52bWUK