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Thu, 13 Aug 2020 08:00:30 -0700 (PDT) Subject: Re: [PATCH v7] nvme-fabrics: reject I/O to offline device To: Victor Gladkov , "linux-nvme@lists.infradead.org" References: <168ed5d66eae49ac8b445478b1bb362d@kioxia.com> From: James Smart Message-ID: Date: Thu, 13 Aug 2020 08:00:25 -0700 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <168ed5d66eae49ac8b445478b1bb362d@kioxia.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200813_110035_855187_C68D42AD X-CRM114-Status: GOOD ( 21.07 ) 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: Sagi Grimberg , "Ewan D. Milne" , Hannes Reinecke 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 T24gNy84LzIwMjAgODowNyBBTSwgVmljdG9yIEdsYWRrb3Ygd3JvdGU6Cj4gQ29tbWFuZHMgZ2V0 IHN0dWNrIHdoaWxlIEhvc3QgTlZNZSBjb250cm9sbGVyIChUQ1Agb3IgUkRNQSkgaXMgaW4KPiBy ZWNvbm5lY3Qgc3RhdGUuIE5WTWUgY29udHJvbGxlciBlbnRlcnMgaW50byByZWNvbm5lY3Qgc3Rh dGUgd2hlbiBpdAo+IGxvc2VzIGNvbm5lY3Rpb24gd2l0aCB0aGUgdGFyZ2V0LiBJdCB0cmllcyB0 byByZWNvbm5lY3QgZXZlcnkgMTAKPiBzZWNvbmRzIChkZWZhdWx0KSB1bnRpbCBzdWNjZXNzZnVs IHJlY29ubmVjdGlvbiBvciB1bnRpbCByZWNvbm5lY3QKPiB0aW1lLW91dCBpcyByZWFjaGVkLiBU aGUgZGVmYXVsdCByZWNvbm5lY3QgdGltZSBvdXQgaXMgMTAgbWludXRlcy4KPgo+IFRvIGZpeCB0 aGlzIGxvbmcgZGVsYXkgZHVlIHRvIHRoZSBkZWZhdWx0IHRpbWVvdXQgd2UgaW50cm9kdWNlIG5l dwo+IHNlc3Npb24gcGFyYW1ldGVyICJmYXN0X2lvX2ZhaWxfdG1vIi4gVGhlIHRpbWVvdXQgaXMg bWVhc3VyZWQgaW4KPiBzZWNvbmRzIGZyb20gdGhlIGNvbnRyb2xsZXIgcmVjb25uZWN0LCBhbnkg Y29tbWFuZCBiZXlvbmQgdGhhdAo+IHRpbWVvdXQgaXMgcmVqZWN0ZWQuIFRoZSBuZXcgcGFyYW1l dGVyIHZhbHVlIG1heSBiZSBwYXNzZWQgZHVyaW5nCj4gJ2Nvbm5lY3QnLgo+IFRoZSBkZWZhdWx0 IHZhbHVlIG9mIDAgbWVhbnMgbm8gdGltZW91dCAoc2ltaWxhciB0byBjdXJyZW50IGJlaGF2aW9y KS4KPgo+IFdlIGFkZCBhIG5ldyBjb250cm9sbGVyIE5WTUVfQ1RSTF9GQUlMRkFTVF9FWFBJUkVE IGFuZCByZXNwZWN0aXZlCj4gZGVsYXllZCB3b3JrIHRoYXQgdXBkYXRlcyB0aGUgTlZNRV9DVFJM X0ZBSUxGQVNUX0VYUElSRUQgZmxhZy4KPgo+IFdoZW4gdGhlIGNvbnRyb2xsZXIgaXMgZW50ZXJp bmcgdGhlIENPTk5FQ1RJTkcgc3RhdGUsIHdlIHNjaGVkdWxlCj4gdGhlIGRlbGF5ZWRfd29yayBi YXNlZCBvbiBmYWlsZmFzdCB0aW1lb3V0IHZhbHVlLiBJZiB0aGUgdHJhbnNpdGlvbgo+IGlzIG91 dCBvZiBDT05ORUNUSU5HLCB0ZXJtaW5hdGUgZGVsYXllZCB3b3JrIGl0ZW0gYW5kIGVuc3VyZQo+ IGZhaWxmYXN0X2V4cGlyZWQgaXMgZmFsc2UuIElmIGRlbGF5ZWQgd29yayBpdGVtIGV4cGlyZXMg dGhlbiBzZXQKPiAiTlZNRV9DVFJMX0ZBSUxGQVNUX0VYUElSRUQiIGZsYWcgdG8gdHJ1ZS4KPgo+ IFdlIGFsc28gdXBkYXRlIG52bWZfZmFpbF9ub25yZWFkeV9jb21tYW5kKCkgYW5kCj4gbnZtZV9h dmFpbGFibGVfcGF0aCgpIGZ1bmN0aW9ucyB3aXRoIGNoZWNrIHRoZQo+ICJOVk1FX0NUUkxfRkFJ TEZBU1RfRVhQSVJFRCIgY29udHJvbGxlciBmbGFnLgo+Cj4gU2lnbmVkLW9mZi1ieTogVmljdG9y IEdsYWRrb3YgPHZpY3Rvci5nbGFka292IGF0IGtpb3hpYS5jb20+Cj4gU2lnbmVkLW9mZi1ieTog Q2hhaXRhbnlhIEt1bGthcm5pIDxjaGFpdGFueWEua3Vsa2FybmkgYXQgd2RjLmNvbT4KPiBSZXZp ZXdlZC1ieTogSGFubmVzIFJlaW5lY2tlIDxoYXJlQHN1c2UuZGU+CgpWaWN0b3IsCgp3aGVuIHdl IHRhbGtlZCBhYm91dCB3aGF0IGZhc3QgZmFpbCBkb2VzLCB3ZSBkaXNjdXNzZWQgaG93IGl0IHdh cyAKZGlmZmVyZW50IGZyb20gU0NTSSdzIG5vdGlvbiBvZiBmYXN0IGZhaWwsIHdoaWNoIHdhcyBp biBzdXBwb3J0IG9mIAptcGlvLsKgIG52bWUgZGlkbid0IG5lZWQgc2NzaSdzIGZhc3RfZmFpbCBi ZWhhdmlvciBhcyB0aGUgZmFicmljIGNoZWNrIApyZWFkeSdzIGFyZSBzcG90dGluZyB0aGUgbXBh dGggYXR0cmlidXRlcyBpbW1lZGlhdGVseS4gU28gdGhpcyBwYXRjaCBzZXQgCmlzIGZvciAibm9y bWFsIiBpbyB0aGF0IG5vcm1hbGx5IGVudGVycyByZXRyaWVzLsKgIFlvdSByZXBsaWVkIHdpdGgg YSAKdmVyeSBpbXBvcnRhbnQgZGlzdGluY3Rpb24gYWJvdXQgdGhpcyBwYXRjaCB0aGF0IGlzbid0 IGRlc2NyaWJlZCBieSB0aGUgCmFib3ZlLgoKUGxlYXNlIGFkZCB0aGlzIHBhcmFncmFwaCB0byB0 aGUgcGF0Y2ggZGVzY3JpcHRpb246CgogRnJvbSBlbWFpbCBmcm9tIFZpY3RvciBvbiAxMi8zLzIw MTkgYXQgMjowNCBhbSBVUyBQU1Q6CkFwcGxpY2F0aW9ucyBhcmUgZXhwZWN0aW5nIGNvbW1hbmRz IHRvIGNvbXBsZXRlIHdpdGggc3VjY2VzcyBvciBlcnJvciAKd2l0aGluIGEgY2VydGFpbiB0aW1l b3V0ICgzMCBzZWNvbmRzIGJ5IGRlZmF1bHQpLsKgIFRoZSBOVk1lIGhvc3QgaXMgCmVuZm9yY2lu ZyB0aGF0IHRpbWVvdXQgd2hpbGUgaXQgaXMgY29ubmVjdGVkLCBuZXZlciB0aGUgbGVzcywgZHVy aW5nIApyZWNvbm5lY3Rpb24sIHRoZSB0aW1lb3V0IGlzIG5vdCBlbmZvcmNlZCBhbmQgY29tbWFu ZHMgbWF5IGdldCBzdHVjayBmb3IgCmEgbG9uZyBwZXJpb2Qgb3IgZXZlbiBmb3JldmVyLgoKLS0g amFtZXMKCgoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f CkxpbnV4LW52bWUgbWFpbGluZyBsaXN0CkxpbnV4LW52bWVAbGlzdHMuaW5mcmFkZWFkLm9yZwpo dHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LW52bWUK