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Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lJ4ju-00ELcC-8J; Mon, 08 Mar 2021 01:31:18 +0000 Received: from szxga01-in.huawei.com ([45.249.212.187]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lJ4jc-00ELTX-5u for linux-nvme@lists.infradead.org; Mon, 08 Mar 2021 01:31:07 +0000 Received: from DGGEMM405-HUB.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Dv12x0VqkzYD92; Mon, 8 Mar 2021 09:29:13 +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; Mon, 8 Mar 2021 09:30:48 +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; Mon, 8 Mar 2021 09:30:48 +0800 Subject: Re: [PATCH] nvme-fabrics: fix crash for no IO queues To: Sagi Grimberg , CC: , , References: <20210304005543.8005-1-lengchao@huawei.com> <020b9f27-459a-2b98-2e76-ebcc874c9c32@grimberg.me> From: Chao Leng Message-ID: <78c5e9f9-f5b8-b8e5-1c36-3a5803d4b047@huawei.com> Date: Mon, 8 Mar 2021 09:30:47 +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: <020b9f27-459a-2b98-2e76-ebcc874c9c32@grimberg.me> Content-Language: en-US X-Originating-IP: [10.169.42.93] X-ClientProxiedBy: dggeme708-chm.china.huawei.com (10.1.199.104) 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-20210308_013100_640244_357D9058 X-CRM114-Status: GOOD ( 22.39 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 CgpPbiAyMDIxLzMvNiA0OjU4LCBTYWdpIEdyaW1iZXJnIHdyb3RlOgo+IAo+PiBBIGNyYXNoIGhh cHBlbnMgd2hlbiBzZXQgZmVhdHVyZShOVk1FX0ZFQVRfTlVNX1FVRVVFUykgdGltZW91dCBpbiBu dm1lCj4+IG92ZXIgcmRtYShyb2NlKSByZWNvbm5lY3Rpb24sIHRoZSByZWFzb24gaXMgdXNlIHRo ZSBxdWV1ZSB3aGljaCBpcyBub3QKPj4gYWxsb2NlZC4KPj4KPj4gSWYgcXVldWUgaXMgbm90IGxp dmUsIHNob3VsZCBub3QgYWxsb3cgcXVldWUgcmVxdWVzdC4KPiAKPiBDYW4geW91IGRlc2NyaWJl IGV4YWN0bHkgdGhlIHNjZW5hcmlvIGhlcmU/IFdoYXQgaXMgdGhlIHN0YXRlCj4gaGVyZT8gTElW RT8gb3IgREVMRVRJTkc/CklmIHNldGluZyBmZWF0dXJlKE5WTUVfRkVBVF9OVU1fUVVFVUVTKSBm YWlsZWQgZHVlIHRvIHRpbWUgb3V0IG9yCnRoZSB0YXJnZXQgcmV0dXJuIDAgaW8gcXVldWVzLCBu dm1lX3NldF9xdWV1ZV9jb3VudCB3aWxsIHJldHVybiAwLAphbmQgdGhlbiByZWNvbm5lY3Rpb24g d2lsbCBjb250aW51ZSBhbmQgc3VjY2Vzcy4gVGhlIHN0YXRlIG9mIGNvbnRyb2xsZXIKaXMgTElW RS4gVGhlIHJlcXVlc3Qgd2lsbCBjb250aW51ZSB0byBkZWxpdmVyIGJ5IGNhbGwgLT5xdWV1ZV9y cSgpLAphbmQgdGhlbiBjcmFzaCBoYXBwZW5zLgo+IAo+Pgo+PiBTaWduZWQtb2ZmLWJ5OiBDaGFv IExlbmcgPGxlbmdjaGFvQGh1YXdlaS5jb20+Cj4+IC0tLQo+PiDCoCBkcml2ZXJzL252bWUvaG9z dC9mYWJyaWNzLmggfCAyICstCj4+IMKgIDEgZmlsZSBjaGFuZ2VkLCAxIGluc2VydGlvbigrKSwg MSBkZWxldGlvbigtKQo+Pgo+PiBkaWZmIC0tZ2l0IGEvZHJpdmVycy9udm1lL2hvc3QvZmFicmlj cy5oIGIvZHJpdmVycy9udm1lL2hvc3QvZmFicmljcy5oCj4+IGluZGV4IDczMzAxMGQyZWFmZC4u MjQ3OTc0NGZjMzQ5IDEwMDY0NAo+PiAtLS0gYS9kcml2ZXJzL252bWUvaG9zdC9mYWJyaWNzLmgK Pj4gKysrIGIvZHJpdmVycy9udm1lL2hvc3QvZmFicmljcy5oCj4+IEBAIC0xODksNyArMTg5LDcg QEAgc3RhdGljIGlubGluZSBib29sIG52bWZfY2hlY2tfcmVhZHkoc3RydWN0IG52bWVfY3RybCAq Y3RybCwgc3RydWN0IHJlcXVlc3QgKnJxLAo+PiDCoCB7Cj4+IMKgwqDCoMKgwqAgaWYgKGxpa2Vs eShjdHJsLT5zdGF0ZSA9PSBOVk1FX0NUUkxfTElWRSB8fAo+PiDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqAgY3RybC0+c3RhdGUgPT0gTlZNRV9DVFJMX0RFTEVUSU5HKSkKPj4gLcKgwqDCoMKgwqDC oMKgIHJldHVybiB0cnVlOwo+PiArwqDCoMKgwqDCoMKgwqAgcmV0dXJuIHF1ZXVlX2xpdmU7Cj4+ IMKgwqDCoMKgwqAgcmV0dXJuIF9fbnZtZl9jaGVja19yZWFkeShjdHJsLCBycSwgcXVldWVfbGl2 ZSk7Cj4+IMKgIH0KPiAKPiBUaGVyZSB3ZXJlIHNvbWUgaXNzdWVzIGluIHRoZSBwYXN0IHRoYXQg bWFkZSB1cyBhbGxvdyBzdWJtaXR0aW5nCj4gcmVxdWVzdHMgaW4gREVMRVRJTkcgc3RhdGUgYW5k IGludHJvZHVjaW5nIERFTEVUSU5HX05PSU8uIFNlZQo+IHBhdGNoIGVjY2EzOTBlODA1NiAoIm52 bWU6IGZpeCBkZWFkbG9jayBpbiBkaXNjb25uZWN0IGR1cmluZyBzY2FuX3dvcmsgYW5kL29yIGFu YV93b3JrIikKVGhpcyBkb2Vzbid0IG1ha2UgYW55IGRpZmZlcmVuY2UuIFdoZW4gaW4gZGVsZXRp bmcgc3RhdGUgdGhlIHF1ZXVlIGlzCnN0aWxsIGxpdmUuCj4gCj4gVGhlIGRyaXZlciBzaG91bGQg YmUgYWJsZSB0byBhY2NlcHQgSS9PIGluIERFTEVUSU5HIGJlY2F1c2UgdGhlIGNvcmUKPiBjaGFu Z2VzIHRoZSBzdGF0ZSB0byBERUxFVElOR19OT0lPIF9iZWZvcmVfIGl0IGNhbGxzIC0+ZGVsZXRl X2N0cmwgc28gSQo+IGRvbid0IHVuZGVyc3RhbmQgaG93IHlvdSBnZXQgdG8gdGhpcyBpZiB0aGUg cXVldWUgaXMgbm90IGFsbG9jYXRlZC4uLgpUaGUgc3RhdGUgb2YgY29udHJvbGxlciBpcyBsaXZl LiBUaGUgZGVsZXRpb24gcHJvY2VzcyBsb29rcyBnb29kLgo+IC4KCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCkxpbnV4LW52bWUgbWFpbGluZyBsaXN0Ckxp bnV4LW52bWVAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9t YWlsbWFuL2xpc3RpbmZvL2xpbnV4LW52bWUK