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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,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 33CE5C04FF3 for ; Fri, 21 May 2021 22:34:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 113E96135C for ; Fri, 21 May 2021 22:34:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229937AbhEUWgA (ORCPT ); Fri, 21 May 2021 18:36:00 -0400 Received: from mail-wm1-f44.google.com ([209.85.128.44]:41645 "EHLO mail-wm1-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229507AbhEUWf6 (ORCPT ); Fri, 21 May 2021 18:35:58 -0400 Received: by mail-wm1-f44.google.com with SMTP id l11-20020a05600c4f0bb029017a7cd488f5so5283124wmq.0 for ; Fri, 21 May 2021 15:34:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=kUMI2+VJBvrfyxF0TnZrFPg59JKRi9yHzzdOTmyJIwU=; b=RGlJ1ziJ09kmU+INK1WBNOkJxS1pmj1KoaCwEMR/2V+Fl1Olzu/t3/pE6u4+r25g6/ bBwahR7kXawYymHhQ7JFeKNGqEZCTsuWRug0Ycm92m+sGJ2edk3P6h/k4o7KWoCQFGDG UVgVLNtqtreSus9em/IJsulINX7ZjDn7peFnfbAe/3mJHh1XEDk3DSIapsNjhDjJo1Ix fQWqGCrYA4bV57Cc2gdPtEfblIuEi0gVCjis1hzfd59HZ9OD/wOlgCxOBKVaEIBGPo27 5tsoc3rcEfo3TODI5vm9OK+/0K9I1G+I+ruNN7aRqGLqAnDawTdQLR6FpcjzrKwxt/OB Nleg== X-Gm-Message-State: AOAM530duRF08EgM1m/u14eGC0Rcrzf2B4Hiw0pe9c/tVUOYTZRJQiWa 57dlbDBN9ZoRQwRPUWQtWeY= X-Google-Smtp-Source: ABdhPJxPwE80Mrjced/fQhx+HqdZxh/zPfQGLdEHSgAltgc+RgEotDdkl7lO2158LySvsdlmQT5rZQ== X-Received: by 2002:a05:600c:3510:: with SMTP id h16mr10257627wmq.38.1621636472746; Fri, 21 May 2021 15:34:32 -0700 (PDT) Received: from ?IPv6:2601:647:4802:9070:66b2:1988:438b:4253? ([2601:647:4802:9070:66b2:1988:438b:4253]) by smtp.gmail.com with ESMTPSA id t7sm3323970wrs.87.2021.05.21.15.34.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 21 May 2021 15:34:32 -0700 (PDT) Subject: Re: [RFC PATCH v5 05/27] nvme-tcp-offload: Add controller level error recovery implementation To: Shai Malin , netdev@vger.kernel.org, linux-nvme@lists.infradead.org, davem@davemloft.net, kuba@kernel.org, hch@lst.de, axboe@fb.com, kbusch@kernel.org Cc: aelior@marvell.com, mkalderon@marvell.com, okulkarni@marvell.com, pkushwaha@marvell.com, malin1024@gmail.com, Arie Gershberg References: <20210519111340.20613-1-smalin@marvell.com> <20210519111340.20613-6-smalin@marvell.com> From: Sagi Grimberg Message-ID: <8343236b-91d6-a3d7-4abb-c74b993763d2@grimberg.me> Date: Fri, 21 May 2021 15:34:28 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <20210519111340.20613-6-smalin@marvell.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org > In this patch, we implement controller level error handling and recovery. > Upon an error discovered by the ULP or reset controller initiated by the > nvme-core (using reset_ctrl workqueue), the ULP will initiate a controller > recovery which includes teardown and re-connect of all queues. It's becoming an eye-soar how much our transports duplicate code...