From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 62C4CC433E0 for ; Thu, 18 Mar 2021 01:51:50 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A1B2364E83 for ; Thu, 18 Mar 2021 01:51:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A1B2364E83 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:CC:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=BBA7KdD11YM16doxbG6sT5SV9VDlkX2kDGvSddKMI6g=; b=QjxG6E5feh+MdD8F/axVcsrXJ rHp6LuTsWJwFkeilIa4OAt+Bmqc75kQ1DhyzXSXDI/IMUUEqBjTR2KTDCUOrvWkYs4/GSD4L0S9Os Zlvlo9PYemEwIZ7NixTSnYPR6tkyj7VMPNc884Xmz/z+sKMQiTjtp4uwZJiqAu6dJGDuqs92tnH6+ feRsKqdiAdaEonb9yWKtm15kuF1lCkDJSuAPhrqCR4ASfAcnYtz6USiIRub2Xywcu9G0/0rzbl87R J8pw2sRmNK7y+DMW9qlHqeyA4tq0yLX8F3+2P/x/kT0Ys1MLVUE1HqZDXSbIE6MhpZc5mjMEDEMvm fOvmqrCGA==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lMhoz-004G5A-6o; Thu, 18 Mar 2021 01:51:33 +0000 Received: from szxga02-in.huawei.com ([45.249.212.188]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lMhoq-004G4a-QJ for linux-nvme@lists.infradead.org; Thu, 18 Mar 2021 01:51:30 +0000 Received: from DGGEMM402-HUB.china.huawei.com (unknown [172.30.72.55]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4F191k4932zRR53; Thu, 18 Mar 2021 09:49:30 +0800 (CST) Received: from dggema772-chm.china.huawei.com (10.1.198.214) by DGGEMM402-HUB.china.huawei.com (10.3.20.210) with Microsoft SMTP Server (TLS) id 14.3.498.0; Thu, 18 Mar 2021 09:51:15 +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; Thu, 18 Mar 2021 09:51:14 +0800 Subject: Re: [PATCH 0/3 rfc] Fix nvme-tcp and nvme-rdma controller reset hangs To: Sagi Grimberg , Christoph Hellwig CC: Keith Busch , , 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> <6c085430-cc10-a2fd-56ee-a360109c940a@grimberg.me> From: Chao Leng Message-ID: <55142c25-9a70-08a0-d46a-cad21da59d19@huawei.com> Date: Thu, 18 Mar 2021 09:51:14 +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: <6c085430-cc10-a2fd-56ee-a360109c940a@grimberg.me> Content-Language: en-US X-Originating-IP: [10.169.42.93] X-ClientProxiedBy: dggeme710-chm.china.huawei.com (10.1.199.106) 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-20210318_015128_305124_2B2891B8 X-CRM114-Status: GOOD ( 19.62 ) 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 CgpPbiAyMDIxLzMvMTggMjo0MywgU2FnaSBHcmltYmVyZyB3cm90ZToKPiAKPj4+Pj4+IFdpbGwg aXQgd29yayBpZiBudm1lIG1wYXRoIHVzZWQgcmVxdWVzdCBOT1dBSVQgZmxhZyBmb3IgaXRzIHN1 Ym1pdF9iaW8oKQo+Pj4+Pj4gY2FsbCwgYW5kIGFkZCB0aGUgYmlvIHRvIHRoZSByZXF1ZXVlX2xp c3QgaWYgYmxrX3F1ZXVlX2VudGVyKCkgZmFpbHM/IEkKPj4+Pj4+IHRoaW5rIHRoYXQgbG9va3Mg bGlrZSBhbm90aGVyIHdheSB0byByZXNvbHZlIHRoZSBkZWFkbG9jaywgYnV0IHdlIG5lZWQKPj4+ Pj4+IHRoZSBibG9jayBsYXllciB0byByZXR1cm4gYSBmYWlsZWQgc3RhdHVzIHRvIHRoZSBvcmln aW5hbCBjYWxsZXIuCj4+Pgo+Pj4gWWVzLCBJIHRoaW5rIEJMS19NUV9SRVFfTk9XQUlUIG1ha2Vz IHRvdGFsIHNlbnNlIGhlcmUuwqAgZG0tbXBhdGggYWxzbwo+Pj4gdXNlcyBpdCBmb3IgaXRzIHJl cXVlc3QgYWxsb2NhdGlvbiBmb3Igc2ltaWxhciByZWFzb25zLgo+Pj4KPj4+Pj4KPj4+Pj4gQnV0 IHdobyB3b3VsZCBraWNrIHRoZSByZXF1ZXVlIGxpc3Q/IGFuZCB0aGF0IHdvdWxkIG1ha2UgbmVh ci10YWctZXhoYXVzdCBwZXJmb3JtYW5jZSBzdGluay4uLgo+Pj4KPj4+IFRoZSBtdWx0aXBhdGgg Y29kZSB3b3VsZCBoYXZlIHRvIGtpY2sgdGhlIGxpc3QuwqAgV2UgY291bGQgYWxzbyB0cnkgdG8K Pj4+IHNwbGl0IGludG8gdHdvIGZsYWdzLCBvbmUgdGhhdCBhZmZlY3RzIGJsa19xdWV1ZV9lbnRl ciBhbmQgb25lIHRoYXQKPj4+IGFmZmVjdHMgdGhlIHRhZyBhbGxvY2F0aW9uLgo+Pj4KPj4+PiBt b3ZpbmcgbnZtZV9zdGFydF9mcmVlemUgZnJvbSBudm1lX3JkbWFfdGVhcmRvd25faW9fcXVldWVz IHRvIG52bWVfcmRtYV9jb25maWd1cmVfaW9fcXVldWVzIGNhbiBmaXggaXQuCj4+Pj4gSXQgY2Fu IGFsc28gYXZvaWQgSS9PIGhhbmcgbG9uZyB0aW1lIGlmIHJlY29ubmVjdGlvbiBmYWlsZWQuCj4+ Pgo+Pj4gQ2FuIHlvdSBleHBsYWluIGhvdyB3ZSdkIHN0aWxsIGVuc3VyZSB0aGF0IG5vIG5ldyBj b21tYW5kcyBnZXQgcXVldWVkCj4+PiBkdXJpbmcgdGVhcmRvd24gdXNpbmcgdGhhdCBzY2hlbWU/ Cj4+IDEuIHRlYXIgZG93biB3aWxsIGNhbmNlbCBhbGwgaW5mbGlnaHQgcmVxdWVzdHMsIGFuZCB0 aGVuIG11bHRpcGF0aCB3aWxsIGNsZWFyIHRoZSBwYXRoLgo+PiAyLiBhbmQgdGhlbiB3ZSBtYXkg ZnJlZXplIHRoZSBjb250cm9sZXIuCj4+IDMuIG52bWVfbnNfaGVhZF9zdWJtaXRfYmlvIGNhbiBu b3QgZmluZCB0aGUgcmVjb25uZWN0aW9uIGNvbnRyb2xsZXIgYXMgdmFsaWQgcGF0aCwgc28gaXQg aXMgc2FmZS4KPiAKPiBJbiBub24tbXBhdGggKHdoaWNoIHVuZm9ydHVuYXRlbHkgaXMgYSB2YWxp ZCB1c2UtY2FzZSksIHRoZXJlIGlzIG5vCj4gZmFpbG92ZXIsIGFuZCB3ZSBjYW5ub3QgZnJlZXpl IHRoZSBxdWV1ZSBhZnRlciB3ZSBzdG9wcGVkIChhbmQvb3IKPiBzdGFydGVkKSB0aGUgcXVldWVz IGJlY2F1c2UgdGhlbiBmYWlsX25vbl9yZWFkeV9jb21tYW5kKCkgY29uc3RhbnRseSByZXR1cm4g QkxLX1NUU19SRVNPVVJDRSAoanVzdCBjYXVzaW5nIGEgcmUtc3VibWlzc2lvbiBvdmVyIGFuZCBv dmVyCj4gYWdhaW4pIGFuZCB0aGUgZnJlZXplIHdpbGwgbmV2ZXIgY29tcGxldGUgKHRoZSBjb21t YW5kcyBhcmUgc3RpbGwKPiBpbmZsaWdodCBmcm9tIHRoZSBxdWV1ZS0+Z191c2FnZV9jb3VudGVy IHBlcnNwZWN0aXZlKS4KSWYgdGhlIHJlcXVlc3Qgc2V0IHRoZSBmbGFncyB0byBSRVFfRkFJTEZB U1RfeHh4LCB3aWxsIGhhbmcgbG9uZyB0aW1lIGlmIHJlY29ubmVjdGlvbiBmYWlsZWQuClRoaXMg aXMgbm90IGV4cGVjdGVkLgpBbm90aGVyLCBJZiB0aGUgY29udHJvbGxlciBpcyBub3QgbGl2ZSBh bmQgdGhlIGNvbnRyb2xsZXIgaXMgZnJlZXplZCDvvIxmYXN0X2lvX2ZhaWxfdG1vIHdpbGwgbm90 IHdvcmsuClRoaXMgaXMgYWxzbyBub3QgZXhwZWN0ZWQuClNvIEkgdGhpbmsgZnJlZXppbmcgdGhl IGNvbnRyb2xsZXIgd2hlbiByZWNvbm5lY3RpbmcgaXMgbm90IGdvb2QgaWRlYS4KSXQncyByZWFs bHkgbm90IGdvb2QgYmVoYXZpb3IgdG8gdHJ5IGFnYWluIGFuZCBhZ2Fpbi4gVGhpcyBpcyBhdCBs ZWFzdCBiZXR0ZXIgdGhhbiByZXF1ZXN0IGhhbmcgbG9uZyB0aW1lLgo+IAo+IFNvIEkgdGhpbmsg d2Ugc2hvdWxkIHN0aWxsIHN0YXJ0IHF1ZXVlIGZyZWV6ZSBiZWZvcmUgd2UgcXVpZXNjZQo+IHRo ZSBxdWV1ZXMuCldlIHNob3VsZCB1bnF1aWVzY2UgYW5kIHVuZnJlZXplIHRoZSBxdWV1ZXMgd2hl biByZWNvbm5lY3RpbmcsIG90aGVyd2lzZSBmYXN0X2lvX2ZhaWxfdG1vIHdpbGwgbm90IHdvcmsu Cj4gCj4gSSBzdGlsbCBkb24ndCBzZWUgaG93IHRoZSBtcGF0aCBOT1dBSVQgc3VnZ2VzdGlvbiB3 b3JrcyBlaXRoZXIuLi4KbXBhdGggd2lsbCBxdWV1dWUgcmVxdWVzdCB0byBvdGhlciBsaXZlIHBh dGggb3IgcmVxdWV1ZSB0aGUgcmVxdWVzdChpZiBubyB1c2VkIHBhdGgpLCBzbyBpdCB3aWxsIG5v dCB3YWl0Lgo+IC4KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fCkxpbnV4LW52bWUgbWFpbGluZyBsaXN0CkxpbnV4LW52bWVAbGlzdHMuaW5mcmFkZWFkLm9y ZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LW52bWUK