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Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5JqT-0006jq-C7; Fri, 29 Jan 2021 02:49:13 +0000 Received: from szxga08-in.huawei.com ([45.249.212.255]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5JqO-0006iw-OW for linux-nvme@lists.infradead.org; Fri, 29 Jan 2021 02:49:11 +0000 Received: from DGGEMM401-HUB.china.huawei.com (unknown [172.30.72.53]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4DRhZC1JCrz13mL4; Fri, 29 Jan 2021 10:46:59 +0800 (CST) Received: from dggema772-chm.china.huawei.com (10.1.198.214) by DGGEMM401-HUB.china.huawei.com (10.3.20.209) with Microsoft SMTP Server (TLS) id 14.3.498.0; Fri, 29 Jan 2021 10:48:59 +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 10:48:58 +0800 Subject: Re: [PATCH v4 4/5] nvme-rdma: avoid IO error for nvme native multipath To: Sagi Grimberg , References: <20210126081539.13320-1-lengchao@huawei.com> <20210126081539.13320-5-lengchao@huawei.com> <5a368693-65fd-1bdf-924a-f90df7f59b2a@grimberg.me> <9c30b18a-6fdd-be1c-f3bc-1d44c35ae274@huawei.com> From: Chao Leng Message-ID: <29ccc5e0-66e9-93db-e9b9-09012f1c8fe2@huawei.com> Date: Fri, 29 Jan 2021 10:48:57 +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: dggeme715-chm.china.huawei.com (10.1.199.111) 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_214909_039882_85FD68C2 X-CRM114-Status: GOOD ( 18.18 ) 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: kbusch@kernel.org, axboe@fb.com, linux-block@vger.kernel.org, hch@lst.de, axboe@kernel.dk 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 CgpPbiAyMDIxLzEvMjkgOTozNSwgU2FnaSBHcmltYmVyZyB3cm90ZToKPiAKPj4+PiBAQCAtMjA4 NCw4ICsyMDg1LDEwIEBAIHN0YXRpYyBibGtfc3RhdHVzX3QgbnZtZV9yZG1hX3F1ZXVlX3JxKHN0 cnVjdCBibGtfbXFfaHdfY3R4ICpoY3R4LAo+Pj4+IMKgwqDCoMKgwqAgZXJyID0gbnZtZV9yZG1h X3Bvc3Rfc2VuZChxdWV1ZSwgc3FlLCByZXEtPnNnZSwgcmVxLT5udW1fc2dlLAo+Pj4+IMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgIHJlcS0+bXIgPyAmcmVxLT5yZWdfd3Iud3IgOiBOVUxMKTsK Pj4+PiAtwqDCoMKgIGlmICh1bmxpa2VseShlcnIpKQo+Pj4+ICvCoMKgwqAgaWYgKHVubGlrZWx5 KGVycikpIHsKPj4+PiArwqDCoMKgwqDCoMKgwqAgZHJpdmVyX2Vycm9yID0gdHJ1ZTsKPj4+PiDC oMKgwqDCoMKgwqDCoMKgwqAgZ290byBlcnJfdW5tYXA7Cj4+Pgo+Pj4gV2h5IG5vdCBqdXN0IGNh bGwgc2V0IHRoZSBzdGF0dXMgYW5kIGNhbGwgbnZtZV9yZG1hX2NvbXBsZXRlX3JxIGFuZAo+Pj4g cmV0dXJuIGhlcmU/Cj4+IElmIHRoZSBlcnIgaXMgRU5PTUVNIG9yIEVBR0FJTiwgSSBhbSBub3Qg c3VyZSB0aGUgZXJyIG11c3QgYmUgYQo+PiBwYXRoLXJlbGF0ZWQgZXJyb3IgZm9yIGFsbCBIQkEg ZHJpdmVycy4gU28gcmV1c2VkIHRoZSBlcnJvciBjaGVjayBjb2RlLgo+PiBJIHRoaW5rIGl0IHdv dWxkIGJlIG1vcmUgcmVhc29uYWJsZSB0byBhc3N1bWUgYW55IGVycm9ycyByZXR1cm5lZCBieSBI QkEKPj4gZHJpdmVyIGFzIHBhdGgtcmVsYXRlZCBlcnJvcnMuCj4+IElmIHlvdSB0aGluayBzbywg SSB3aWxsIG1vZGlmeSBpdCBpbiBuZXh0IHBhdGNoIHZlcnNpb24uCj4gCj4gTWVhbnQgdG8gZG8g dGhhdCBvbmx5IGZvciAtRUlPLiBXZSBzaG91bGQgYWJzb2x1dGVseSBub3QgZG8gYW55IG9mIHRo aXMKPiBmb3Igc3R1ZmYgbGlrZSBFSU5WQUwsIEVPUE5PVFNVUFAsIEVQRVJNIG9yIGFueSBzdHJh bmdlIGVycm9yIHRoYXQgbWF5Cj4gcmV0dXJuIGR1ZSB0byBhIGJ1ZyBvciBhbnl0aGluZyBsaWtl IHRoYXQuCm9rLCBwbGVhc2UgcmV2aWV3IGFnYWluLCB0aGFuayB5b3UuCi0tLQogIGRyaXZlcnMv bnZtZS9ob3N0L3JkbWEuYyB8IDkgKysrKysrKy0tCiAgMSBmaWxlIGNoYW5nZWQsIDcgaW5zZXJ0 aW9ucygrKSwgMiBkZWxldGlvbnMoLSkKCmRpZmYgLS1naXQgYS9kcml2ZXJzL252bWUvaG9zdC9y ZG1hLmMgYi9kcml2ZXJzL252bWUvaG9zdC9yZG1hLmMKaW5kZXggYjdjZTRmMjIxZDk5Li42NmI2 OTc0NjFiZDkgMTAwNjQ0Ci0tLSBhL2RyaXZlcnMvbnZtZS9ob3N0L3JkbWEuYworKysgYi9kcml2 ZXJzL252bWUvaG9zdC9yZG1hLmMKQEAgLTIwODQsOCArMjA4NCwxMyBAQCBzdGF0aWMgYmxrX3N0 YXR1c190IG52bWVfcmRtYV9xdWV1ZV9ycShzdHJ1Y3QgYmxrX21xX2h3X2N0eCAqaGN0eCwKCiAg ICAgICAgIGVyciA9IG52bWVfcmRtYV9wb3N0X3NlbmQocXVldWUsIHNxZSwgcmVxLT5zZ2UsIHJl cS0+bnVtX3NnZSwKICAgICAgICAgICAgICAgICAgICAgICAgIHJlcS0+bXIgPyAmcmVxLT5yZWdf d3Iud3IgOiBOVUxMKTsKLSAgICAgICBpZiAodW5saWtlbHkoZXJyKSkKKyAgICAgICBpZiAodW5s aWtlbHkoZXJyKSkgeworICAgICAgICAgICAgICAgaWYgKGVyciA9PSAtRUlPKSB7CisgICAgICAg ICAgICAgICAgICAgICAgIG52bWVfY29tcGxldGVfZmFpbGVkX3JxKHJxLCBOVk1FX1NDX0hPU1Rf UEFUSF9FUlJPUik7CisgICAgICAgICAgICAgICAgICAgICAgIGVyciA9IDA7CisgICAgICAgICAg ICAgICB9CiAgICAgICAgICAgICAgICAgZ290byBlcnJfdW5tYXA7CisgICAgICAgfQoKICAgICAg ICAgcmV0dXJuIEJMS19TVFNfT0s7CgpAQCAtMjA5NCw3ICsyMDk5LDcgQEAgc3RhdGljIGJsa19z dGF0dXNfdCBudm1lX3JkbWFfcXVldWVfcnEoc3RydWN0IGJsa19tcV9od19jdHggKmhjdHgsCiAg ZXJyOgogICAgICAgICBpZiAoZXJyID09IC1FTk9NRU0gfHwgZXJyID09IC1FQUdBSU4pCiAgICAg ICAgICAgICAgICAgcmV0ID0gQkxLX1NUU19SRVNPVVJDRTsKLSAgICAgICBlbHNlCisgICAgICAg ZWxzZSBpZiAoZXJyKQogICAgICAgICAgICAgICAgIHJldCA9IEJMS19TVFNfSU9FUlI7CiAgICAg ICAgIG52bWVfY2xlYW51cF9jbWQocnEpOwogIHVubWFwX3FlOgotLSAKPiAuCgpfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eC1udm1lIG1haWxpbmcg bGlzdApMaW51eC1udm1lQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVh ZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1udm1lCg==