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([2601:647:4802:9070:a836:db4c:a7ac:3d7c]) by smtp.gmail.com with ESMTPSA id 11sm3975131pfz.91.2020.04.02.08.38.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 02 Apr 2020 08:38:19 -0700 (PDT) Subject: Re: nvme deadlock with ANA To: Hannes Reinecke , Christoph Hellwig References: <5e38c566-3f26-288d-1004-161d1084b468@grimberg.me> <20200402151854.GA11784@lst.de> <7fce512e-deb6-2357-d627-d1a698a8269b@grimberg.me> <4ec0c3ba-398d-0922-87f4-4b0a99a79abb@suse.de> From: Sagi Grimberg Message-ID: Date: Thu, 2 Apr 2020 08:38:17 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <4ec0c3ba-398d-0922-87f4-4b0a99a79abb@suse.de> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200402_083821_581206_18569844 X-CRM114-Status: GOOD ( 15.79 ) 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: Keith Busch , Anton Eidelman , linux-nvme 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+Pj4gSSB3YW50IHRvIGNvbnN1bHQgd2l0aCB5b3UgZ3V5cyBvbiBhIGRlYWRsb2NrIGNvbmRp dGlvbiBJJ20gYWJsZSB0bwo+Pj4+IGhpdCB3aXRoIGEgdGVzdCB0aGF0IGluY29ycG9yYXRlIGNv bnRyb2xsZXIgcmVjb25uZWN0LCBhbmEgdXBkYXRlcwo+Pj4+IGFuZCBsaXZlIEkvTyB3aXRoIHRp bWVvdXRzLgo+Pj4+Cj4+Pj4gVGhpcyBpcyB0cnVlIGZvciBOVk1lL1RDUCwgYnV0IGNhbiBhbHNv IGhhcHBlbiBpbiByZG1hIG9yIHBjaSAKPj4+PiBkcml2ZXJzIGFzCj4+Pj4gd2VsbC4KPj4+Pgo+ Pj4+IFRoZSBkZWFkbG9jayBjb21iaW5lcyA0IGZsb3dzIGluIHBhcmFsbGVsOgo+Pj4+IC0gbnMg c2Nhbm5pbmcgKHRyaWdnZXJlZCBmcm9tIHJlY29ubmVjdCkKPj4+PiAtIHJlcXVlc3QgdGltZW91 dAo+Pj4+IC0gQU5BIHVwZGF0ZSAodHJpZ2dlcmVkIGZyb20gcmVjb25uZWN0KQo+Pj4+IC0gRlMg SS9PIGNvbWluZyBpbnRvIHRoZSBtcGF0aCBkZXZpY2UKPj4+Pgo+Pj4+ICgxKSBucyBzY2Fubmlu ZyB0cmlnZ2VycyBkaXNrIHJldmFsaWRhdGlvbiAtPiB1cGRhdGUgZGlzayBpbmZvIC0+Cj4+Pj4g wqDCoMKgwqAgZnJlZXplIHF1ZXVlIC0+IGJ1dCBibG9ja2VkLCB3aHk/Cj4+Pgo+Pj4gV2hhdCBk b2VzIC0+IGJ1dCBibG9ja2VkIG1lYW4/Cj4+Cj4+IEl0IGlzIGJsb2NrZWQgYW5kIGNhbm5vdCBj b21wbGV0ZSwgYmVjYXVzZSBvZiAoMikKPj4KPj4+PiAoMikgdGltZW91dCBoYW5kbGVyIHJlZmVy ZW5jZSB0aGUgZ191c2FnZV9jb3VudGVyIC0gPiBidXQgYmxvY2tzIGluCj4+Pj4gwqDCoMKgwqAg dGhlIHRpbWVvdXQgaGFuZGxlciwgd2h5Pwo+Pj4KPj4+IFRoZSB0aW1lb3V0IGhhbmRsZXIgb2J2 aW91c2x5IG5lZWRzIHRvIGtlZXAgdGhlIHF1ZXVlIGFsaXZlIHdoaWxlCj4+PiBydW5uaW5nLsKg IFdlIGNvdWxkIHRoaW5rIG9mIGRvaW5nIGEgdHJ5X2dldCwgdGhvdWdoPwo+Pgo+PiBJdCBpcyBr ZWVwaW5nIHRoZSBxdWV1ZSBhbGl2ZSwgdGhhdCBpcyBub3QgdGhlIGlzc3VlLiBpdCBpcyBibG9j a2VkIGluCj4+IHRoZSBkcml2ZXIgLnRpbWVvdXQoKSBoYW5kbGVyIChpLmUuIG52bWVfdGNwX3Rp bWVvdXQpLgo+Pgo+PiBUaGUgcmVhc29uIHRoYXQgaXQgYmxvY2tlZCBhbmQgY2Fubm90IG1ha2Ug Zm9yd2FyZCBwcm9ncmVzcyBpcyBiZWNhdXNlCj4+IHRoZSBkcml2ZXIgdGltZW91dCBoYW5kbGVy IHdpbGwgY2FsbCBudm1lX3N0b3BfcXVldWVzKCksIHdoaWNoIGlzCj4+IGJsb2NrZWQgYXMgdGhp cyB0YWtlcyBuYW1lc3BhY2VzX3J3c2VtLi4uCj4+Cj4+IFRoZXJlIGlzIGEgY2hhaW4gb2YgZGVw ZW5kZW5jeSB0aGF0IGlzIGRlYWRsb2NraW5nIHdpdGggY2lyY3VsYXIKPj4gZGVwZW5kZW5jeS4K PiAKPiBDYW4ndCB5b3Ugc2ltcGx5IGNhbGwgJ252bWVfcmVzZXRfY3RybCgpJyA/Cj4gU2VlbXMg dG8gd29yayByZWFzb25hYmx5IHdlbGwgb24gdGhlIGZjIHNpZGUsIHNvIEkgd29uZGVyIHdoYXQn cyAKPiBkaWZmZXJlbnQgZm9yIHRjcCAuLi4KCkFzIEkgbWVudGlvbmVkLCB0aGlzIGlzIG5vdCBz cGVjaWZpYyBmb3IgdGNwLCBpdCBwY2kgdGltZW91dCBoYW5kbGVyCmNhbiBibG9jayBqdXN0IGFz IHdlbGwgYmVjYXVzZSBpdCBjYWxscyBudm1lX2Rldl9kaXNhYmxlIHdoaWNoIGNhbGxzCm52bWVf c3RvcF9xdWV1ZXMuIFRoZSByZXN0IG9mIHRoZSBmbG93cyBhcmUgbm90IHJlbGF0ZWQgdG8gdGhl CnRyYW5zcG9ydC4KClRoZXJlIGlzIG5vIGV4cGVjdGF0aW9uIGZyb20gdGhlIGRyaXZlciB0byBh bHdheXMgZGVmZXIgaGFuZGxpbmcgdGhlCnRpbWVvdXQgdG8gYSBkaWZmZXJlbnQgY29udGV4dCwg YnV0IHNob3VsZCB3ZSBtYWtlIHRoYXQgb3BlcmF0aW9uIGZvcgpudm1lIHRyYW5zcHJvdHMgYXQg bGVhc3Q/CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwps aW51eC1udm1lIG1haWxpbmcgbGlzdApsaW51eC1udm1lQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0 cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1udm1lCg==