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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=T68ryp+FasjabYeP77mVPv2pBFJHw67rT6+NStGsYzo=; b=m3Ug+CFRW8Vs2BZZMHNsVyoa2 fgj4VfbgMNwu4FvkMn06/q6524coUAd0DUNU783e0mn82AfdjPDnvJv4Yhg+cSmeIC5/pIPNt4iK8 ELBUcvWheT2VyKNsNrrgvvMyaf06R6SWmMGVowF2yT8eETWUkiAi9KisFwjWuq80gpRgNQfmrVQlH drvd54Z6Kui6YO39PwPxDpsZ+6p2Rrcx8msv7uGE7e9VlpQtN7rMDEuuTYXFrxoER3MQXD4zYID7a ZaCV2zW3oNRdnJAHg1j13VJ3lkQ7FhQjwCFNdIZJSS0XaMpDmdP1ZUGfoBkMpqUSgonxJ7XCdl33h De1BYfVXw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5PQC-0007O9-Oy; Fri, 29 Jan 2021 08:46:28 +0000 Received: from szxga01-in.huawei.com ([45.249.212.187]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5PQ9-0007N3-W1 for linux-nvme@lists.infradead.org; Fri, 29 Jan 2021 08:46:27 +0000 Received: from DGGEMM405-HUB.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4DRrWW3KYjzY3h3; Fri, 29 Jan 2021 16:45:11 +0800 (CST) Received: from dggema772-chm.china.huawei.com (10.1.198.214) by DGGEMM405-HUB.china.huawei.com (10.3.20.213) with Microsoft SMTP Server (TLS) id 14.3.498.0; Fri, 29 Jan 2021 16:46:18 +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 16:46:17 +0800 Subject: Re: [PATCH v2] nvme-multipath: Early exit if no path is available To: Hannes Reinecke , 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> <715dd943-0587-be08-2840-e0948cf0bc62@suse.de> From: Chao Leng Message-ID: Date: Fri, 29 Jan 2021 16:46:16 +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: <715dd943-0587-be08-2840-e0948cf0bc62@suse.de> 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-20210129_034626_561453_75C3F6B7 X-CRM114-Status: GOOD ( 16.11 ) 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 CgpPbiAyMDIxLzEvMjkgMTY6MzMsIEhhbm5lcyBSZWluZWNrZSB3cm90ZToKPiBPbiAxLzI5LzIx IDg6NDUgQU0sIENoYW8gTGVuZyB3cm90ZToKPj4KPj4KPj4gT24gMjAyMS8xLzI5IDE1OjA2LCBI YW5uZXMgUmVpbmVja2Ugd3JvdGU6Cj4+PiBPbiAxLzI5LzIxIDQ6MDcgQU0sIENoYW8gTGVuZyB3 cm90ZToKPj4+Pgo+Pj4+Cj4+Pj4gT24gMjAyMS8xLzI5IDk6NDIsIFNhZ2kgR3JpbWJlcmcgd3Jv dGU6Cj4+Pj4+Cj4+Pj4+Pj4gWW91IGNhbid0IHNlZSBleGFjdGx5IHdoZXJlIGl0IGRpZXMgYnV0 IEkgZm9sbG93ZWQgdGhlIGFzc2VtYmx5IHRvCj4+Pj4+Pj4gbnZtZV9yb3VuZF9yb2Jpbl9wYXRo KCkuIE1heWJlIGl0J3Mgbm90IHRoZSBpbml0aWFsIG52bWVfbmV4dF9ucyhoZWFkLAo+Pj4+Pj4+ IG9sZCkgd2hpY2ggcmV0dXJucyBOVUxMIGJ1dCBudm1lX25leHRfbnMoKSBpcyByZXR1cm5pbmcg TlVMTCBldmVudHVhbGx5Cj4+Pj4+Pj4gKGxpc3RfbmV4dF9vcl9udWxsX3JjdSgpKS4KPj4+Pj4+ IFNvIHRoZXJlIGlzIG90aGVyIGJ1ZyBjYXVzZSBudm1lX25leHRfbnMgYWJvcm1hbC4KPj4+Pj4+ IEkgcmV2aWV3IHRoZSBjb2RlIGFib3V0IGhlYWQtPmxpc3QgYW5kIGhlYWQtPmN1cnJlbnRfcGF0 aCwgSSBmaW5kIDIgYnVncwo+Pj4+Pj4gbWF5IGNhdXNlIHRoZSBidWc6Cj4+Pj4+PiBGaXJzdCwg SSBhbHJlYWR5IHNlbmQgdGhlIHBhdGNoLiBzZWU6Cj4+Pj4+PiBodHRwczovL2xvcmUua2VybmVs Lm9yZy9saW51eC1udm1lLzIwMjEwMTI4MDMzMzUxLjIyMTE2LTEtbGVuZ2NoYW9AaHVhd2VpLmNv bS8KPj4+Pj4+IFNlY29uZCwgaW4gbnZtZV9uc19yZW1vdmUsIGxpc3RfZGVsX3JjdSBpcyBiZWZv cmUKPj4+Pj4+IG52bWVfbXBhdGhfY2xlYXJfY3VycmVudF9wYXRoLiBUaGlzIG1heSBjYXVzZSAi b2xkIiBpcyBkZWxldGVkIGZyb20gdGhlCj4+Pj4+PiAiaGVhZCIsIGJ1dCBzdGlsbCB1c2UgIm9s ZCIuIEknbSBub3Qgc3VyZSB0aGVyZSdzIGFueSBvdGhlcgo+Pj4+Pj4gY29uc2lkZXJhdGlvbiBo ZXJlLCBJIHdpbGwgY2hlY2sgaXQgYW5kIHRyeSB0byBmaXggaXQuCj4+Pj4+Cj4+Pj4+IFRoZSBy ZWFzb24gd2h5IHdlIGZpcnN0IHJlbW92ZSBmcm9tIGhlYWQtPmxpc3QgYW5kIG9ubHkgdGhlbiBj bGVhcgo+Pj4+PiBjdXJyZW50X3BhdGggaXMgYmVjYXVzZSB0aGUgb3RoZXIgd2F5IGFyb3VuZCB0 aGVyZSBpcyBubyB3YXkKPj4+Pj4gdG8gZ3VhcmFudGVlIHRoYXQgdGhhdCB0aGUgbnMgd29uJ3Qg YmUgYXNzaWduZWQgYXMgY3VycmVudF9wYXRoCj4+Pj4+IGFnYWluIChiZWNhdXNlIGl0IGlzIGlu IGhlYWQtPmxpc3QpLgo+Pj4+IG9rLCBJIHNlZS4KPj4+Pj4KPj4+Pj4gbnZtZV9uc19yZW1vdmUg ZmVuY2VzIGNvbnRpbnVlIG9mIGRlbGV0aW9uIG9mIHRoZSBucyBieSBzeW5jaHJvbml6aW5nCj4+ Pj4+IHRoZSBzcmN1IHN1Y2ggdGhhdCBmb3Igc3VyZSB0aGUgY3VycmVudF9wYXRoIGNsZWFyYW5j ZSBpcyB2aXNpYmxlLgo+Pj4+IFRoZSBsaXN0IHdpbGwgYmUgbGlrZSB0aGlzOgo+Pj4+IGhlYWQt Pm5leHQgPSBuczE7Cj4+Pj4gbnMxLT5uZXh0ID0gaGVhZDsKPj4+PiBvbGQtPm5leHQgPSBuczE7 Cj4+Pgo+Pj4gV2hlcmUgZG9lcyAnb2xkJyBwb2ludGluZyB0bz8KPj4+Cj4+Pj4gVGhpcyBtYXkg Y2F1c2UgaW5maW5pdGUgbG9vcCBpbiBudm1lX3JvdW5kX3JvYmluX3BhdGguCj4+Pj4gZm9yIChu cyA9IG52bWVfbmV4dF9ucyhoZWFkLCBvbGQpOwo+Pj4+IMKgwqDCoMKgwqBucyAhPSBvbGQ7Cj4+ Pj4gwqDCoMKgwqDCoG5zID0gbnZtZV9uZXh0X25zKGhlYWQsIG5zKSkKPj4+PiBUaGUgbnMgd2ls bCBhbHdheXMgYmUgbnMxLCBhbmQgdGhlbiBpbmZpbml0ZSBsb29wLgo+Pj4KPj4+IE5vLiBudm1l X25leHRfbnMoKSB3aWxsIHJldHVybiBOVUxMLgo+PiBJZiB0aGVyZSBpcyBqdXN0IG9uZSBwYXRo KHRoZSAib2xkIikgYW5kIHRoZSAib2xkIiBpcyBkZWxldGVkLAo+PiBudm1lX25leHRfbnMoKSB3 aWxsIHJldHVybiBOVUxMLgo+PiBUaGUgbGlzdCBsaWtlIHRoaXM6Cj4+IGhlYWQtPm5leHQgPSBo ZWFkOwo+PiBvbGQtPm5leHQgPSBoZWFkOwo+PiBJZiB0aGVyZSBpcyB0d28gb3IgbW9yZSBwYXRo IGFuZCB0aGUgIm9sZCIgaXMgZGVsZXRlZCwKPj4gImZvciIgd2lsbCBiZSBpbmZpbml0ZSBsb29w LiBiZWNhdXNlIG52bWVfbmV4dF9ucygpIHdpbGwgcmV0dXJuCj4+IHRoZSBwYXRoIHdoaWNoIGlu IHRoZSBsaXN0IGV4Y2VwdCB0aGUgIm9sZCIsIGNoZWNrIGNvbmRpdGlvbiB3aWxsCj4+IGJlIHRy dWUgZm9yIGV2ZXIuCj4gCj4gQnV0IHRoYXQgd2lsbCBiZSBjYXVnaHQgYnkgdGhlIHN0YXRlbWVu dCBhYm92ZToKPiAKPiBpZiAobGlzdF9pc19zaW5ndWxhcigmaGVhZC0+bGlzdCkpCj4gCj4gbm8/ ClR3byBwYXRoIGp1c3QgYSBzYW1wbGUgZXhhbXBsZS4KSWYgdGhlcmUgaXMganVzdCB0d28gcGF0 aCwgd2lsbCBlbnRlciBpdCwgbWF5IGNhdXNlIG5vIHBhdGggYnV0IHRoZXJlIGlzCmFjdHVhbGx5 IG9uZSBwYXRoLiBJdCBpcyBmYWxzZWx5IGFzc3VtZWQgdGhhdCB0aGUgIm9sZCIgbXVzdCBiZSBu b3QgZGVsZXRlZC4KSWYgdGhlcmUgaXMgbW9yZSB0aGFuIHR3byBwYXRoLCB3aWxsIGNhdXNlIGlu ZmluaXRlIGxvb3AuCj4gCj4gQ2hlZXJzLAo+IAo+IEhhbm5lcwoKX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTGludXgtbnZtZSBtYWlsaW5nIGxpc3QKTGlu dXgtbnZtZUBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21h aWxtYW4vbGlzdGluZm8vbGludXgtbnZtZQo=