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, 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 DFCD8C433E6 for ; Thu, 18 Mar 2021 04:46:19 +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 787CE64F30 for ; Thu, 18 Mar 2021 04:46:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 787CE64F30 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de 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-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=rB5PDzzhLhvink4mS/QVRW9ibM2W0Ldk3VPCTtQBxhs=; b=F31Ytdz99R5p2ahJrZTacbf1r LXSfUFltVGyfiKjgKw7Cbgu2IlGalWl/fetK0fiH+7d4C1cAHqgH30J+PYH2jvQLDzEXzFbZZZ0qV ZHI5m2ZVYHyEK1Mx/EMVZhpMBegcZXL7K0c1pUbBlnafgqcVDXY0ve+IIC5F2mQdTM+PUdEyS9ohd lbZeRMNsbAuV/SLfl9pwHnwBsSKiHq4J9vqZl9wVQ4gWuPtecWyqo5+RiQOY7kOUmftCEaJiwJITp h0x7VjAZwnt2eEsX2Y02QScfjb8mlPT30ntqU2vW92epEvyuCmp9AWURGtmrtIpmNZydSQgdBuVDT SKlkKsm7w==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lMkXg-004RAy-P2; Thu, 18 Mar 2021 04:45:52 +0000 Received: from verein.lst.de ([213.95.11.211]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lMkXV-004R90-P6 for linux-nvme@lists.infradead.org; Thu, 18 Mar 2021 04:45:49 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 85DB568C4E; Thu, 18 Mar 2021 05:45:39 +0100 (CET) Date: Thu, 18 Mar 2021 05:45:39 +0100 From: Christoph Hellwig To: Chao Leng Cc: Sagi Grimberg , Christoph Hellwig , Keith Busch , linux-nvme@lists.infradead.org, Chaitanya Kulkarni Subject: Re: [PATCH 0/3 rfc] Fix nvme-tcp and nvme-rdma controller reset hangs Message-ID: <20210318044539.GA27156@lst.de> 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> <55142c25-9a70-08a0-d46a-cad21da59d19@huawei.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <55142c25-9a70-08a0-d46a-cad21da59d19@huawei.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210318_044547_742418_D0FC7451 X-CRM114-Status: GOOD ( 23.42 ) 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-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org T24gVGh1LCBNYXIgMTgsIDIwMjEgYXQgMDk6NTE6MTRBTSArMDgwMCwgQ2hhbyBMZW5nIHdyb3Rl Ogo+Pj4+IFRoZSBtdWx0aXBhdGggY29kZSB3b3VsZCBoYXZlIHRvIGtpY2sgdGhlIGxpc3QuwqAg V2UgY291bGQgYWxzbyB0cnkgdG8KPj4+PiBzcGxpdCBpbnRvIHR3byBmbGFncywgb25lIHRoYXQg YWZmZWN0cyBibGtfcXVldWVfZW50ZXIgYW5kIG9uZSB0aGF0Cj4+Pj4gYWZmZWN0cyB0aGUgdGFn IGFsbG9jYXRpb24uCj4+Pj4KPj4+Pj4gbW92aW5nIG52bWVfc3RhcnRfZnJlZXplIGZyb20gbnZt ZV9yZG1hX3RlYXJkb3duX2lvX3F1ZXVlcyB0byBudm1lX3JkbWFfY29uZmlndXJlX2lvX3F1ZXVl cyBjYW4gZml4IGl0Lgo+Pj4+PiBJdCBjYW4gYWxzbyBhdm9pZCBJL08gaGFuZyBsb25nIHRpbWUg aWYgcmVjb25uZWN0aW9uIGZhaWxlZC4KPj4+Pgo+Pj4+IENhbiB5b3UgZXhwbGFpbiBob3cgd2Un ZCBzdGlsbCBlbnN1cmUgdGhhdCBubyBuZXcgY29tbWFuZHMgZ2V0IHF1ZXVlZAo+Pj4+IGR1cmlu ZyB0ZWFyZG93biB1c2luZyB0aGF0IHNjaGVtZT8KPj4+IDEuIHRlYXIgZG93biB3aWxsIGNhbmNl bCBhbGwgaW5mbGlnaHQgcmVxdWVzdHMsIGFuZCB0aGVuIG11bHRpcGF0aCB3aWxsIGNsZWFyIHRo ZSBwYXRoLgo+Pj4gMi4gYW5kIHRoZW4gd2UgbWF5IGZyZWV6ZSB0aGUgY29udHJvbGVyLgo+Pj4g My4gbnZtZV9uc19oZWFkX3N1Ym1pdF9iaW8gY2FuIG5vdCBmaW5kIHRoZSByZWNvbm5lY3Rpb24g Y29udHJvbGxlciBhcyB2YWxpZCBwYXRoLCBzbyBpdCBpcyBzYWZlLgo+Pgo+PiBJbiBub24tbXBh dGggKHdoaWNoIHVuZm9ydHVuYXRlbHkgaXMgYSB2YWxpZCB1c2UtY2FzZSksIHRoZXJlIGlzIG5v Cj4+IGZhaWxvdmVyLCBhbmQgd2UgY2Fubm90IGZyZWV6ZSB0aGUgcXVldWUgYWZ0ZXIgd2Ugc3Rv cHBlZCAoYW5kL29yCj4+IHN0YXJ0ZWQpIHRoZSBxdWV1ZXMgYmVjYXVzZSB0aGVuIGZhaWxfbm9u X3JlYWR5X2NvbW1hbmQoKSBjb25zdGFudGx5IHJldHVybiBCTEtfU1RTX1JFU09VUkNFIChqdXN0 IGNhdXNpbmcgYSByZS1zdWJtaXNzaW9uIG92ZXIgYW5kIG92ZXIKPj4gYWdhaW4pIGFuZCB0aGUg ZnJlZXplIHdpbGwgbmV2ZXIgY29tcGxldGUgKHRoZSBjb21tYW5kcyBhcmUgc3RpbGwKPj4gaW5m bGlnaHQgZnJvbSB0aGUgcXVldWUtPmdfdXNhZ2VfY291bnRlciBwZXJzcGVjdGl2ZSkuCj4gSWYg dGhlIHJlcXVlc3Qgc2V0IHRoZSBmbGFncyB0byBSRVFfRkFJTEZBU1RfeHh4LCB3aWxsIGhhbmcg bG9uZyB0aW1lIGlmIHJlY29ubmVjdGlvbiBmYWlsZWQuCj4gVGhpcyBpcyBub3QgZXhwZWN0ZWQu Cj4gQW5vdGhlciwgSWYgdGhlIGNvbnRyb2xsZXIgaXMgbm90IGxpdmUgYW5kIHRoZSBjb250cm9s bGVyIGlzIGZyZWV6ZWQg77yMZmFzdF9pb19mYWlsX3RtbyB3aWxsIG5vdCB3b3JrLgo+IFRoaXMg aXMgYWxzbyBub3QgZXhwZWN0ZWQuCj4gU28gSSB0aGluayBmcmVlemluZyB0aGUgY29udHJvbGxl ciB3aGVuIHJlY29ubmVjdGluZyBpcyBub3QgZ29vZCBpZGVhLgo+IEl0J3MgcmVhbGx5IG5vdCBn b29kIGJlaGF2aW9yIHRvIHRyeSBhZ2FpbiBhbmQgYWdhaW4uIFRoaXMgaXMgYXQgbGVhc3QgYmV0 dGVyIHRoYW4gcmVxdWVzdCBoYW5nIGxvbmcgdGltZS4KCldlbGwsIGl0IGlzIHByZXR0eSBjbGVh ciB0aGF0IFJFUV9GQUlMRkFTVF8qIChhbmQgSSdtIHN0aWxsIGNvbmZ1c2VkCmFib3V0IHRoZSB0 aHJlZSB2YXJpYW50cyBvZiB0aGF0KSBzaG91bGQgbm90IGJsb2NrIGluIGJsa19xdWV1ZV9lbnRl ciwKYW5kIHdlIHNob3VsZCBtYWtlIHN1cmUgbnZtZS1tdWx0aXBhdGggdHJpZ2dlcnMgdGhhdC4g IExldCBtZSB0aGluZwpvZiBhIGdvb2Qgd2F5IHRvIHJlZmFjdG9yIGJsa19xdWV1ZV9lbnRlciBm aXJzdCB0byBtYWtlIHRoYXQgbGVhc3QKcGFpbmZ1bC4KCj4+IFNvIEkgdGhpbmsgd2Ugc2hvdWxk IHN0aWxsIHN0YXJ0IHF1ZXVlIGZyZWV6ZSBiZWZvcmUgd2UgcXVpZXNjZQo+PiB0aGUgcXVldWVz Lgo+IFdlIHNob3VsZCB1bnF1aWVzY2UgYW5kIHVuZnJlZXplIHRoZSBxdWV1ZXMgd2hlbiByZWNv bm5lY3RpbmcsIG90aGVyd2lzZSBmYXN0X2lvX2ZhaWxfdG1vIHdpbGwgbm90IHdvcmsuCj4+Cj4+ IEkgc3RpbGwgZG9uJ3Qgc2VlIGhvdyB0aGUgbXBhdGggTk9XQUlUIHN1Z2dlc3Rpb24gd29ya3Mg ZWl0aGVyLi4uCj4gbXBhdGggd2lsbCBxdWV1dWUgcmVxdWVzdCB0byBvdGhlciBsaXZlIHBhdGgg b3IgcmVxdWV1ZSB0aGUgcmVxdWVzdChpZiBubyB1c2VkIHBhdGgpLCBzbyBpdCB3aWxsIG5vdCB3 YWl0Lgo+PiAuCgpZZXMuCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fXwpMaW51eC1udm1lIG1haWxpbmcgbGlzdApMaW51eC1udm1lQGxpc3RzLmluZnJhZGVh ZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1u dm1lCg==