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([2601:647:4802:9070:3dd5:ca84:dc28:de72]) by smtp.gmail.com with ESMTPSA id y9sm20878195pgc.9.2021.03.17.11.44.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 17 Mar 2021 11:44:00 -0700 (PDT) Subject: Re: [PATCH 0/3 rfc] Fix nvme-tcp and nvme-rdma controller reset hangs To: Chao Leng , Christoph Hellwig Cc: Keith Busch , linux-nvme@lists.infradead.org, Chaitanya Kulkarni References: <20210315222714.378417-1-sagi@grimberg.me> <1b2ccda9-5789-e73a-f0c9-2dd40f320203@grimberg.me> <20210316204204.GA23332@redsun51.ssa.fujisawa.hgst.com> <59f7a030-ea33-5c31-3c18-197c5a12e982@grimberg.me> <17b15849-f0f3-af61-113f-0eb717e96f0f@huawei.com> <20210317065910.GC14498@lst.de> <2e391aae-58c7-b8f7-1a9e-d7ad5bb3f8f3@huawei.com> From: Sagi Grimberg Message-ID: <6c085430-cc10-a2fd-56ee-a360109c940a@grimberg.me> Date: Wed, 17 Mar 2021 11:43:59 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: <2e391aae-58c7-b8f7-1a9e-d7ad5bb3f8f3@huawei.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210317_184403_426510_BE6956C8 X-CRM114-Status: GOOD ( 19.25 ) 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 Cj4+Pj4+IFdpbGwgaXQgd29yayBpZiBudm1lIG1wYXRoIHVzZWQgcmVxdWVzdCBOT1dBSVQgZmxh ZyBmb3IgaXRzIAo+Pj4+PiBzdWJtaXRfYmlvKCkKPj4+Pj4gY2FsbCwgYW5kIGFkZCB0aGUgYmlv IHRvIHRoZSByZXF1ZXVlX2xpc3QgaWYgYmxrX3F1ZXVlX2VudGVyKCkgCj4+Pj4+IGZhaWxzPyBJ Cj4+Pj4+IHRoaW5rIHRoYXQgbG9va3MgbGlrZSBhbm90aGVyIHdheSB0byByZXNvbHZlIHRoZSBk ZWFkbG9jaywgYnV0IHdlIG5lZWQKPj4+Pj4gdGhlIGJsb2NrIGxheWVyIHRvIHJldHVybiBhIGZh aWxlZCBzdGF0dXMgdG8gdGhlIG9yaWdpbmFsIGNhbGxlci4KPj4KPj4gWWVzLCBJIHRoaW5rIEJM S19NUV9SRVFfTk9XQUlUIG1ha2VzIHRvdGFsIHNlbnNlIGhlcmUuwqAgZG0tbXBhdGggYWxzbwo+ PiB1c2VzIGl0IGZvciBpdHMgcmVxdWVzdCBhbGxvY2F0aW9uIGZvciBzaW1pbGFyIHJlYXNvbnMu Cj4+Cj4+Pj4KPj4+PiBCdXQgd2hvIHdvdWxkIGtpY2sgdGhlIHJlcXVldWUgbGlzdD8gYW5kIHRo YXQgd291bGQgbWFrZSAKPj4+PiBuZWFyLXRhZy1leGhhdXN0IHBlcmZvcm1hbmNlIHN0aW5rLi4u Cj4+Cj4+IFRoZSBtdWx0aXBhdGggY29kZSB3b3VsZCBoYXZlIHRvIGtpY2sgdGhlIGxpc3QuwqAg V2UgY291bGQgYWxzbyB0cnkgdG8KPj4gc3BsaXQgaW50byB0d28gZmxhZ3MsIG9uZSB0aGF0IGFm ZmVjdHMgYmxrX3F1ZXVlX2VudGVyIGFuZCBvbmUgdGhhdAo+PiBhZmZlY3RzIHRoZSB0YWcgYWxs b2NhdGlvbi4KPj4KPj4+IG1vdmluZyBudm1lX3N0YXJ0X2ZyZWV6ZSBmcm9tIG52bWVfcmRtYV90 ZWFyZG93bl9pb19xdWV1ZXMgdG8gCj4+PiBudm1lX3JkbWFfY29uZmlndXJlX2lvX3F1ZXVlcyBj YW4gZml4IGl0Lgo+Pj4gSXQgY2FuIGFsc28gYXZvaWQgSS9PIGhhbmcgbG9uZyB0aW1lIGlmIHJl Y29ubmVjdGlvbiBmYWlsZWQuCj4+Cj4+IENhbiB5b3UgZXhwbGFpbiBob3cgd2UnZCBzdGlsbCBl bnN1cmUgdGhhdCBubyBuZXcgY29tbWFuZHMgZ2V0IHF1ZXVlZAo+PiBkdXJpbmcgdGVhcmRvd24g dXNpbmcgdGhhdCBzY2hlbWU/Cj4gMS4gdGVhciBkb3duIHdpbGwgY2FuY2VsIGFsbCBpbmZsaWdo dCByZXF1ZXN0cywgYW5kIHRoZW4gbXVsdGlwYXRoIHdpbGwgCj4gY2xlYXIgdGhlIHBhdGguCj4g Mi4gYW5kIHRoZW4gd2UgbWF5IGZyZWV6ZSB0aGUgY29udHJvbGVyLgo+IDMuIG52bWVfbnNfaGVh ZF9zdWJtaXRfYmlvIGNhbiBub3QgZmluZCB0aGUgcmVjb25uZWN0aW9uIGNvbnRyb2xsZXIgYXMg Cj4gdmFsaWQgcGF0aCwgc28gaXQgaXMgc2FmZS4KCkluIG5vbi1tcGF0aCAod2hpY2ggdW5mb3J0 dW5hdGVseSBpcyBhIHZhbGlkIHVzZS1jYXNlKSwgdGhlcmUgaXMgbm8KZmFpbG92ZXIsIGFuZCB3 ZSBjYW5ub3QgZnJlZXplIHRoZSBxdWV1ZSBhZnRlciB3ZSBzdG9wcGVkIChhbmQvb3IKc3RhcnRl ZCkgdGhlIHF1ZXVlcyBiZWNhdXNlIHRoZW4gZmFpbF9ub25fcmVhZHlfY29tbWFuZCgpIGNvbnN0 YW50bHkgCnJldHVybiBCTEtfU1RTX1JFU09VUkNFIChqdXN0IGNhdXNpbmcgYSByZS1zdWJtaXNz aW9uIG92ZXIgYW5kIG92ZXIKYWdhaW4pIGFuZCB0aGUgZnJlZXplIHdpbGwgbmV2ZXIgY29tcGxl dGUgKHRoZSBjb21tYW5kcyBhcmUgc3RpbGwKaW5mbGlnaHQgZnJvbSB0aGUgcXVldWUtPmdfdXNh Z2VfY291bnRlciBwZXJzcGVjdGl2ZSkuCgpTbyBJIHRoaW5rIHdlIHNob3VsZCBzdGlsbCBzdGFy dCBxdWV1ZSBmcmVlemUgYmVmb3JlIHdlIHF1aWVzY2UKdGhlIHF1ZXVlcy4KCkkgc3RpbGwgZG9u J3Qgc2VlIGhvdyB0aGUgbXBhdGggTk9XQUlUIHN1Z2dlc3Rpb24gd29ya3MgZWl0aGVyLi4uCgpf X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eC1udm1l IG1haWxpbmcgbGlzdApMaW51eC1udm1lQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3Rz LmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1udm1lCg==