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,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 C68A4C433E2 for ; Tue, 8 Sep 2020 09:05:29 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 7CE9D20C09 for ; Tue, 8 Sep 2020 09:05:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="qWUOe9XZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7CE9D20C09 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=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject: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=V5y78lFD80EpqnW6DA2tEnpzlGJ8iLJf7Bi7vcNtdP4=; b=qWUOe9XZDVgd6L4atFtE+VqMU LtsqXkKpYXX8P822o1Zw4j+ONI+eeQRXpWh6c4KpAfo7oTQfos/TAbC5HMi6hc5y0j8+VErECcsZa YSr0Yvcs0EAcCekOuGe5VkiMomp7z3l+XTWhMtb9qfK7lQ3ODDwOvJIgYh+nUmRiGmTOFHb9bNzfy U/agpgudlifUWpcXS8aaOhKlZAVDG1eNr8hrsKjC7nnbcV0Yb/Tq77IYrG+446/MuZ9pj6O4rRxyX J5BrN+X3KiJk29G/7mCNvrNo/n9WKqkN69bJ6errznJHuDV7QODC9zx+vuWQbqIBfYNdKCyVe9WoG G+3h1GRNg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kFZZ7-00056U-JU; Tue, 08 Sep 2020 09:05:25 +0000 Received: from verein.lst.de ([213.95.11.211]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kFZZ3-00055w-Np for linux-nvme@lists.infradead.org; Tue, 08 Sep 2020 09:05:22 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 1F9BC68AFE; Tue, 8 Sep 2020 11:05:19 +0200 (CEST) Date: Tue, 8 Sep 2020 11:05:18 +0200 From: Christoph Hellwig To: Sagi Grimberg Subject: Re: [PATCH v3 2/9] nvme-fabrics: allow to queue requests for live queues Message-ID: <20200908090518.GA18666@lst.de> References: <20200820060941.GB6188@lst.de> <813bbd6c-3353-2c40-da48-bdbbdf89690c@grimberg.me> <20200821062217.GC28559@lst.de> <77e27c4e-f939-2c14-8e63-209197f1133c@grimberg.me> <20200825071345.GF29268@lst.de> <128d9766-292f-1e6c-1c0f-3651b4863e6a@broadcom.com> <9a1bd3fb-203b-8a33-76b9-cb373d02744d@grimberg.me> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: 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-20200908_050522_047100_3766E6EC X-CRM114-Status: GOOD ( 18.22 ) 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 , James Smart , linux-nvme@lists.infradead.org, Christoph Hellwig Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Fri, Sep 04, 2020 at 01:26:37PM -0700, Sagi Grimberg wrote: > Guys, we need to resolve this one, this is needed to prevent freeze > during reset from hanging. > > As I said, any I/O that will use the ns->queue shouldn't be denied here > because it takes the q_usage_counter and will prevent a freeze (this is > true for both fs or user I/O commands). > > I still think we should allow the admin ones as well and deny them > somewhere else if we want to, but I'm fine with keeping this exception > now because no one is expected to freeze the admin queue. > > Let me know what you think. I want it to go into an rc soon. Let's do the minimum change variant for now then. _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme