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=-5.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,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 D5E29C433E0 for ; Fri, 29 Jan 2021 08:33:31 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 7F79A64DDE for ; Fri, 29 Jan 2021 08:33:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7F79A64DDE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de 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=merlin.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=Yj1lbh8tb35jGcnRCjkSfGMyW3vBZOOD8p7rlp7g1n8=; b=hu7e7LXv7f2KCuE9OOuBrTmJQ 1pzQvGUvCUgMeirhu+xmsbG4L65B440r24WrMt7pMmdLY6EbzeJNiRRkYOilgLWfUgjPAYj8xlfqM 1BGRnYya4xawdrZnAFB7YwyatxVLu/pnOGbbhdyg1mCHpIUyVXYupbbIZoyhDdLC9XAV3NJHp8qYE ffiyuiiaMEafXsTqwYMcEDpNczJCynCoYJ5g8i6ebSpqwNEqPhnsjPpXUNbX2vniVQ6HkWNV2w4/Y Hmt5GHOb4bXTwYvHrMUWRqKScKvPLC4eShMMha5TrZHFbKi7/OyAb2fT2jedfRW/s+BHsukTVOoO5 nkbX8LweQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5PDZ-0005jW-5G; Fri, 29 Jan 2021 08:33:25 +0000 Received: from mx2.suse.de ([195.135.220.15]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5PDV-0005iz-Lj for linux-nvme@lists.infradead.org; Fri, 29 Jan 2021 08:33:23 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 860A1B000; Fri, 29 Jan 2021 08:33:20 +0000 (UTC) Subject: Re: [PATCH v2] nvme-multipath: Early exit if no path is available To: Chao Leng , Sagi Grimberg , Daniel Wagner References: <20210127103033.15318-1-dwagner@suse.de> <20210128075837.u5u56t23fq5gu6ou@beryllium.lan> <69575290-200e-b4a1-4269-c71e4c2cc37b@huawei.com> <20210128094004.erwnszjqcxlsi2kd@beryllium.lan> <675d3cf7-1ae8-adc5-b6d0-359fe10f6b23@grimberg.me> <59cd053e-46cb-0235-141f-4ce919c93f48@huawei.com> <65392653-6b03-9195-f686-5fe4b3290bd2@suse.de> <81b22bbf-4dd3-6161-e63a-9699690a4e4f@huawei.com> From: Hannes Reinecke Message-ID: <715dd943-0587-be08-2840-e0948cf0bc62@suse.de> Date: Fri, 29 Jan 2021 09:33:19 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.1 MIME-Version: 1.0 In-Reply-To: <81b22bbf-4dd3-6161-e63a-9699690a4e4f@huawei.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210129_033322_420536_FB5D7AD3 X-CRM114-Status: GOOD ( 22.06 ) 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: Jens Axboe , Keith Busch , linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, 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 T24gMS8yOS8yMSA4OjQ1IEFNLCBDaGFvIExlbmcgd3JvdGU6Cj4gCj4gCj4gT24gMjAyMS8xLzI5 IDE1OjA2LCBIYW5uZXMgUmVpbmVja2Ugd3JvdGU6Cj4+IE9uIDEvMjkvMjEgNDowNyBBTSwgQ2hh byBMZW5nIHdyb3RlOgo+Pj4KPj4+Cj4+PiBPbiAyMDIxLzEvMjkgOTo0MiwgU2FnaSBHcmltYmVy ZyB3cm90ZToKPj4+Pgo+Pj4+Pj4gWW91IGNhbid0IHNlZSBleGFjdGx5IHdoZXJlIGl0IGRpZXMg YnV0IEkgZm9sbG93ZWQgdGhlIGFzc2VtYmx5IHRvCj4+Pj4+PiBudm1lX3JvdW5kX3JvYmluX3Bh dGgoKS4gTWF5YmUgaXQncyBub3QgdGhlIGluaXRpYWwgCj4+Pj4+PiBudm1lX25leHRfbnMoaGVh ZCwKPj4+Pj4+IG9sZCkgd2hpY2ggcmV0dXJucyBOVUxMIGJ1dCBudm1lX25leHRfbnMoKSBpcyBy ZXR1cm5pbmcgTlVMTCAKPj4+Pj4+IGV2ZW50dWFsbHkKPj4+Pj4+IChsaXN0X25leHRfb3JfbnVs bF9yY3UoKSkuCj4+Pj4+IFNvIHRoZXJlIGlzIG90aGVyIGJ1ZyBjYXVzZSBudm1lX25leHRfbnMg YWJvcm1hbC4KPj4+Pj4gSSByZXZpZXcgdGhlIGNvZGUgYWJvdXQgaGVhZC0+bGlzdCBhbmQgaGVh ZC0+Y3VycmVudF9wYXRoLCBJIGZpbmQgMiAKPj4+Pj4gYnVncwo+Pj4+PiBtYXkgY2F1c2UgdGhl IGJ1ZzoKPj4+Pj4gRmlyc3QsIEkgYWxyZWFkeSBzZW5kIHRoZSBwYXRjaC4gc2VlOgo+Pj4+PiBo dHRwczovL2xvcmUua2VybmVsLm9yZy9saW51eC1udm1lLzIwMjEwMTI4MDMzMzUxLjIyMTE2LTEt bGVuZ2NoYW9AaHVhd2VpLmNvbS8gCj4+Pj4+Cj4+Pj4+IFNlY29uZCwgaW4gbnZtZV9uc19yZW1v dmUsIGxpc3RfZGVsX3JjdSBpcyBiZWZvcmUKPj4+Pj4gbnZtZV9tcGF0aF9jbGVhcl9jdXJyZW50 X3BhdGguIFRoaXMgbWF5IGNhdXNlICJvbGQiIGlzIGRlbGV0ZWQgZnJvbSAKPj4+Pj4gdGhlCj4+ Pj4+ICJoZWFkIiwgYnV0IHN0aWxsIHVzZSAib2xkIi4gSSdtIG5vdCBzdXJlIHRoZXJlJ3MgYW55 IG90aGVyCj4+Pj4+IGNvbnNpZGVyYXRpb24gaGVyZSwgSSB3aWxsIGNoZWNrIGl0IGFuZCB0cnkg dG8gZml4IGl0Lgo+Pj4+Cj4+Pj4gVGhlIHJlYXNvbiB3aHkgd2UgZmlyc3QgcmVtb3ZlIGZyb20g aGVhZC0+bGlzdCBhbmQgb25seSB0aGVuIGNsZWFyCj4+Pj4gY3VycmVudF9wYXRoIGlzIGJlY2F1 c2UgdGhlIG90aGVyIHdheSBhcm91bmQgdGhlcmUgaXMgbm8gd2F5Cj4+Pj4gdG8gZ3VhcmFudGVl IHRoYXQgdGhhdCB0aGUgbnMgd29uJ3QgYmUgYXNzaWduZWQgYXMgY3VycmVudF9wYXRoCj4+Pj4g YWdhaW4gKGJlY2F1c2UgaXQgaXMgaW4gaGVhZC0+bGlzdCkuCj4+PiBvaywgSSBzZWUuCj4+Pj4K Pj4+PiBudm1lX25zX3JlbW92ZSBmZW5jZXMgY29udGludWUgb2YgZGVsZXRpb24gb2YgdGhlIG5z IGJ5IHN5bmNocm9uaXppbmcKPj4+PiB0aGUgc3JjdSBzdWNoIHRoYXQgZm9yIHN1cmUgdGhlIGN1 cnJlbnRfcGF0aCBjbGVhcmFuY2UgaXMgdmlzaWJsZS4KPj4+IFRoZSBsaXN0IHdpbGwgYmUgbGlr ZSB0aGlzOgo+Pj4gaGVhZC0+bmV4dCA9IG5zMTsKPj4+IG5zMS0+bmV4dCA9IGhlYWQ7Cj4+PiBv bGQtPm5leHQgPSBuczE7Cj4+Cj4+IFdoZXJlIGRvZXMgJ29sZCcgcG9pbnRpbmcgdG8/Cj4+Cj4+ PiBUaGlzIG1heSBjYXVzZSBpbmZpbml0ZSBsb29wIGluIG52bWVfcm91bmRfcm9iaW5fcGF0aC4K Pj4+IGZvciAobnMgPSBudm1lX25leHRfbnMoaGVhZCwgb2xkKTsKPj4+IMKgwqDCoMKgwqBucyAh PSBvbGQ7Cj4+PiDCoMKgwqDCoMKgbnMgPSBudm1lX25leHRfbnMoaGVhZCwgbnMpKQo+Pj4gVGhl IG5zIHdpbGwgYWx3YXlzIGJlIG5zMSwgYW5kIHRoZW4gaW5maW5pdGUgbG9vcC4KPj4KPj4gTm8u IG52bWVfbmV4dF9ucygpIHdpbGwgcmV0dXJuIE5VTEwuCj4gSWYgdGhlcmUgaXMganVzdCBvbmUg cGF0aCh0aGUgIm9sZCIpIGFuZCB0aGUgIm9sZCIgaXMgZGVsZXRlZCwKPiBudm1lX25leHRfbnMo KSB3aWxsIHJldHVybiBOVUxMLgo+IFRoZSBsaXN0IGxpa2UgdGhpczoKPiBoZWFkLT5uZXh0ID0g aGVhZDsKPiBvbGQtPm5leHQgPSBoZWFkOwo+IElmIHRoZXJlIGlzIHR3byBvciBtb3JlIHBhdGgg YW5kIHRoZSAib2xkIiBpcyBkZWxldGVkLAo+ICJmb3IiIHdpbGwgYmUgaW5maW5pdGUgbG9vcC4g YmVjYXVzZSBudm1lX25leHRfbnMoKSB3aWxsIHJldHVybgo+IHRoZSBwYXRoIHdoaWNoIGluIHRo ZSBsaXN0IGV4Y2VwdCB0aGUgIm9sZCIsIGNoZWNrIGNvbmRpdGlvbiB3aWxsCj4gYmUgdHJ1ZSBm b3IgZXZlci4KCkJ1dCB0aGF0IHdpbGwgYmUgY2F1Z2h0IGJ5IHRoZSBzdGF0ZW1lbnQgYWJvdmU6 CgppZiAobGlzdF9pc19zaW5ndWxhcigmaGVhZC0+bGlzdCkpCgpubz8KCkNoZWVycywKCkhhbm5l cwotLSAKRHIuIEhhbm5lcyBSZWluZWNrZSAgICAgICAgICAgICAgICBLZXJuZWwgU3RvcmFnZSBB cmNoaXRlY3QKaGFyZUBzdXNlLmRlICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgKzQ5IDkx MSA3NDA1MyA2ODgKU1VTRSBTb2Z0d2FyZSBTb2x1dGlvbnMgR21iSCwgTWF4ZmVsZHN0ci4gNSwg OTA0MDkgTsO8cm5iZXJnCkhSQiAzNjgwOSAoQUcgTsO8cm5iZXJnKSwgR2VzY2jDpGZ0c2bDvGhy ZXI6IEZlbGl4IEltZW5kw7ZyZmZlcgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18KTGludXgtbnZtZSBtYWlsaW5nIGxpc3QKTGludXgtbnZtZUBsaXN0cy5p bmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8v bGludXgtbnZtZQo=