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 8FE62C433DB for ; Fri, 29 Jan 2021 03:36:21 +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 2357964DF5 for ; Fri, 29 Jan 2021 03:36:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2357964DF5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.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=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=1eramvhYCsw06F1xjmDrpOttUmjB08v7sFoZcC+xfw0=; b=z7DLMf+xYobT5vE5hifjcYWA5 3Sa/dlzE3MgrXRMdXeETuGHVbo4AGQiqrfrcSeZGY7r7ORYk8BQzRvsg24qqPuXI48f4KtA8hzR+3 9Subr3CXDVVXPiQjQ0Mh8I6Swwgzsgfjx+iRCvA2Vp52aT6RiHN4Y0iNnUywyPG4lBKIvy7G2739S NcxmzqB7CEuWVxzh51tDeMmLlf90OYarfnr+0p8s+P62D2nhCUumFaqjmShuavAwdkpJnP/WPUp2x Egp3rheZW8WuzjJqD+W17cKk4ByA/XAI35CykR+5Od/X3kJgcCigwlzf6yO5P3FhXDZJJy19BiOeh KNzQqSk7w==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5KZz-0001qt-FJ; Fri, 29 Jan 2021 03:36:15 +0000 Received: from szxga02-in.huawei.com ([45.249.212.188]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5KZw-0001qG-UA for linux-nvme@lists.infradead.org; Fri, 29 Jan 2021 03:36:14 +0000 Received: from DGGEMM403-HUB.china.huawei.com (unknown [172.30.72.55]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4DRjdf47cvzR8Ny; Fri, 29 Jan 2021 11:35:02 +0800 (CST) Received: from dggema772-chm.china.huawei.com (10.1.198.214) by DGGEMM403-HUB.china.huawei.com (10.3.20.211) with Microsoft SMTP Server (TLS) id 14.3.498.0; Fri, 29 Jan 2021 11:36:09 +0800 Received: from [10.169.42.93] (10.169.42.93) by dggema772-chm.china.huawei.com (10.1.198.214) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2106.2; Fri, 29 Jan 2021 11:36:08 +0800 Subject: Re: [PATCH v2] nvme-multipath: Early exit if no path is available To: 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> From: Chao Leng Message-ID: Date: Fri, 29 Jan 2021 11:36:08 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Originating-IP: [10.169.42.93] X-ClientProxiedBy: dggeme714-chm.china.huawei.com (10.1.199.110) To dggema772-chm.china.huawei.com (10.1.198.214) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210128_223613_238530_6D69A631 X-CRM114-Status: GOOD ( 11.69 ) 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: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, Jens Axboe , Hannes Reinecke , 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 CgpPbiAyMDIxLzEvMjkgMTE6MzAsIFNhZ2kgR3JpbWJlcmcgd3JvdGU6Cj4gCj4+Pj4+IFlvdSBj YW4ndCBzZWUgZXhhY3RseSB3aGVyZSBpdCBkaWVzIGJ1dCBJIGZvbGxvd2VkIHRoZSBhc3NlbWJs eSB0bwo+Pj4+PiBudm1lX3JvdW5kX3JvYmluX3BhdGgoKS4gTWF5YmUgaXQncyBub3QgdGhlIGlu aXRpYWwgbnZtZV9uZXh0X25zKGhlYWQsCj4+Pj4+IG9sZCkgd2hpY2ggcmV0dXJucyBOVUxMIGJ1 dCBudm1lX25leHRfbnMoKSBpcyByZXR1cm5pbmcgTlVMTCBldmVudHVhbGx5Cj4+Pj4+IChsaXN0 X25leHRfb3JfbnVsbF9yY3UoKSkuCj4+Pj4gU28gdGhlcmUgaXMgb3RoZXIgYnVnIGNhdXNlIG52 bWVfbmV4dF9ucyBhYm9ybWFsLgo+Pj4+IEkgcmV2aWV3IHRoZSBjb2RlIGFib3V0IGhlYWQtPmxp c3QgYW5kIGhlYWQtPmN1cnJlbnRfcGF0aCwgSSBmaW5kIDIgYnVncwo+Pj4+IG1heSBjYXVzZSB0 aGUgYnVnOgo+Pj4+IEZpcnN0LCBJIGFscmVhZHkgc2VuZCB0aGUgcGF0Y2guIHNlZToKPj4+PiBo dHRwczovL2xvcmUua2VybmVsLm9yZy9saW51eC1udm1lLzIwMjEwMTI4MDMzMzUxLjIyMTE2LTEt bGVuZ2NoYW9AaHVhd2VpLmNvbS8KPj4+PiBTZWNvbmQsIGluIG52bWVfbnNfcmVtb3ZlLCBsaXN0 X2RlbF9yY3UgaXMgYmVmb3JlCj4+Pj4gbnZtZV9tcGF0aF9jbGVhcl9jdXJyZW50X3BhdGguIFRo aXMgbWF5IGNhdXNlICJvbGQiIGlzIGRlbGV0ZWQgZnJvbSB0aGUKPj4+PiAiaGVhZCIsIGJ1dCBz dGlsbCB1c2UgIm9sZCIuIEknbSBub3Qgc3VyZSB0aGVyZSdzIGFueSBvdGhlcgo+Pj4+IGNvbnNp ZGVyYXRpb24gaGVyZSwgSSB3aWxsIGNoZWNrIGl0IGFuZCB0cnkgdG8gZml4IGl0Lgo+Pj4KPj4+ IFRoZSByZWFzb24gd2h5IHdlIGZpcnN0IHJlbW92ZSBmcm9tIGhlYWQtPmxpc3QgYW5kIG9ubHkg dGhlbiBjbGVhcgo+Pj4gY3VycmVudF9wYXRoIGlzIGJlY2F1c2UgdGhlIG90aGVyIHdheSBhcm91 bmQgdGhlcmUgaXMgbm8gd2F5Cj4+PiB0byBndWFyYW50ZWUgdGhhdCB0aGF0IHRoZSBucyB3b24n dCBiZSBhc3NpZ25lZCBhcyBjdXJyZW50X3BhdGgKPj4+IGFnYWluIChiZWNhdXNlIGl0IGlzIGlu IGhlYWQtPmxpc3QpLgo+PiBvaywgSSBzZWUuCj4+Pgo+Pj4gbnZtZV9uc19yZW1vdmUgZmVuY2Vz IGNvbnRpbnVlIG9mIGRlbGV0aW9uIG9mIHRoZSBucyBieSBzeW5jaHJvbml6aW5nCj4+PiB0aGUg c3JjdSBzdWNoIHRoYXQgZm9yIHN1cmUgdGhlIGN1cnJlbnRfcGF0aCBjbGVhcmFuY2UgaXMgdmlz aWJsZS4KPj4gVGhlIGxpc3Qgd2lsbCBiZSBsaWtlIHRoaXM6Cj4+IGhlYWQtPm5leHQgPSBuczE7 Cj4+IG5zMS0+bmV4dCA9IGhlYWQ7Cj4+IG9sZC0+bmV4dCA9IG5zMTsKPj4gVGhpcyBtYXkgY2F1 c2UgaW5maW5pdGUgbG9vcCBpbiBudm1lX3JvdW5kX3JvYmluX3BhdGguCj4+IGZvciAobnMgPSBu dm1lX25leHRfbnMoaGVhZCwgb2xkKTsKPj4gwqDCoMKgwqDCoG5zICE9IG9sZDsKPj4gwqDCoMKg wqDCoG5zID0gbnZtZV9uZXh0X25zKGhlYWQsIG5zKSkKPj4gVGhlIG5zIHdpbGwgYWx3YXlzIGJl IG5zMSwgYW5kIHRoZW4gaW5maW5pdGUgbG9vcC4KPiAKPiBXaG8gaXMgYmVpbmcgcmVtb3ZlZD8g SSdtIG5vdCBmb2xsb3dpbmcKVGhlICJvbGQiIGlzIGJlaW5nIHJlbW92ZWQgcGF0aC4KRGFuaWVs IFdhZ25lciByZXBvcnQgY3Jhc2ggbGlrZSB0aGlzOgpoZWFkLT5uZXh0ID0gaGVhZDsKb2xkLT5u ZXh0ID0gaGVhZDsKU28gbnZtZV9uZXh0X25zKGhlYWQsIG9sZCkgd2lsbCByZXR1cm4gTlVMTCwg YW5kIHRoZW4gY3Jhc2guCkFsdGhvdWdoIGNoZWNrIG5zIGNhbiBhdm9pZCBjcmFzaCwgYnV0IGNh biBub3QgYXZvaWQgaW5maW5pdGUgbG9vcC4KClNpbWlsYXIgcmVhc29uLCBUaGUgbGlzdCB3aWxs IGJlIGxpa2UgdGhpczoKaGVhZC0+bmV4dCA9IG5zMTsKbnMxLT5uZXh0ID0gaGVhZDsKb2xkLT5u ZXh0ID0gbnMxOwpuczEgaXMgb3RoZXIgcGF0aC4KCj4gLgoKX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX18KTGludXgtbnZtZSBtYWlsaW5nIGxpc3QKTGludXgt bnZtZUBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxt YW4vbGlzdGluZm8vbGludXgtbnZtZQo=