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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 55144E83043 for ; Tue, 3 Feb 2026 03:14:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=bhbcDfd6GKLuKNUd6g7wVJ0vSapI862aCf53bUJiWfY=; b=kWbMwiEICCDmxSTYaQ0XzizfrX l8N84kkvLoZ3lwwExb5bbI4SRkmfRO0N96Fb8EqWAr+r6dxTp9ucx1iMjB/Gp+PuZgPrd0RRm/y+l 9pxx2Dh3zK6ZiqyXMrsQiPQfAj/ovyKot6hdAiJsrwJ0DbTncWMf+WDN+A6UnXhhfVTE6CqHGAHHf XaiNhDLGJJ2PIz09Iclbdm4bSw+jATibDbcAsCAiLUFlGtDRd2V5wM6XDSapRrrKoXPj6vGFPbQqB 3Pw6e7YnmBTeqJrOJzIyQVUXhxXnoDCzL7It8hhKTv8R32Uil9eF/nC5C6gt8JMfIBVqbO1ks0KTs UA5pbxEA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vn6s2-00000005z7v-2JOD; Tue, 03 Feb 2026 03:14:30 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vn6s0-00000005z6g-2PlR for linux-nvme@lists.infradead.org; Tue, 03 Feb 2026 03:14:30 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1770088466; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=bhbcDfd6GKLuKNUd6g7wVJ0vSapI862aCf53bUJiWfY=; b=U4Gr88Atsf8WFxt31hvO48ZfsSpEDIgy5/6ETkYoB2kPvTqrWZjgi1Dcq53tlKtjH0xAms SC54z7F1usxN9xYyr66X0UGAWLZreSxgo2wXtjG0TICmB/ZWn3a2PHEFJmetytYlKhgR79 JUgGRZWutOv4PNe25u7MH9f6Vj0LJNc= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-33-ZsMK_n_wM4-_HK4DbdKufw-1; Mon, 02 Feb 2026 22:14:24 -0500 X-MC-Unique: ZsMK_n_wM4-_HK4DbdKufw-1 X-Mimecast-MFC-AGG-ID: ZsMK_n_wM4-_HK4DbdKufw_1770088463 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 10047195608F; Tue, 3 Feb 2026 03:14:23 +0000 (UTC) Received: from fedora (unknown [10.72.116.35]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 362251800285; Tue, 3 Feb 2026 03:14:18 +0000 (UTC) Date: Tue, 3 Feb 2026 11:14:13 +0800 From: Ming Lei To: Hannes Reinecke Cc: lsf-pc , "linux-block@vger.kernel.org" , "linux-nvme@lists.infradead.org" Subject: Re: [LSF/MM?BFP TOPIC] Block-layer device resets Message-ID: References: <50ee77fa-0c44-422e-9ee2-eece60b189e1@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <50ee77fa-0c44-422e-9ee2-eece60b189e1@suse.de> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260202_191428_684211_E88CA9FC X-CRM114-Status: GOOD ( 13.88 ) 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: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org Hi Hannes, On Sun, Feb 01, 2026 at 06:06:52PM +0100, Hannes Reinecke wrote: > Hi all, > > We are currently working on implementing cross-controller resets for > NVMe, which requires to send a command to the target which then should > terminate all commands on a given controller. Can you provide a little background why this reset is required? And for solve which problem? > While we could easily terminate the controller, the specification > also requires us to terminate all outstanding commands. > Which then recurses into my all-time favourite topic on how to > abort outstanding commands from the fs/bio layer. nvme_quiesce_io_queues() & nvme_cancel_tagset() may do it, or do you have other new requirement not covered by the two helpers? Thanks, Ming