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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 A32FAC432C3 for ; Tue, 3 Dec 2019 12:44:04 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 7398720684 for ; Tue, 3 Dec 2019 12:44:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="u/Oox4z6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7398720684 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.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=bombadil.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=XWVC23vJeh80BdVTcwPDY/QlOB78wFVdVvi9/9mP0gA=; b=u/Oox4z67pUoGn sYD6EG06CCTOGSaOHd29KPr2SIqFjFdPJGcioCX4IBWn5ItdDXPwXuK7okWtjXH9a/utI/RjYTkkN QStVdtxOk2wHkeLWTVzBEcdEZZME1iSvh8JAsRmwcg9fgRynMTcZjEZR1t+DlwX0eZHxVOn94MS++ /x0qRLfHPSwjMB9ffsRUIGQVYXu7b6zOGWfl2PD+YamS5HB+8bzZ3lx8XKE+UvZLuHZpT2JQ/rKQO FFfsaS8D2FoHU7dtkEFGs1f8viMhBAlVHmdzMY8YpQMdQYaKamgJGqjIbqmfUoDyRXh0xvrHJOUpn QeSGlQaXtPF5LYg/HtUw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1ic7X5-0007mT-WB; Tue, 03 Dec 2019 12:44:00 +0000 Received: from mx2.suse.de ([195.135.220.15] helo=mx1.suse.de) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1ic7X3-0007lz-7W for linux-nvme@lists.infradead.org; Tue, 03 Dec 2019 12:43:58 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id B98BDAC9F; Tue, 3 Dec 2019 12:43:53 +0000 (UTC) Date: Tue, 3 Dec 2019 13:43:51 +0100 From: Johannes Thumshirn To: "hch@lst.de" Subject: Re: [RFC][PATCH] nvme/core: Notify udev about capacity change Message-ID: <20191203124351.GE21721@Johanness-MacBook-Pro.local> References: <20191129002746.6622-1-sblbir@amazon.com> <20191129082449.GA9953@lst.de> <0a5fc287a4ac392b9b192402e6786e7129b9d5f2.camel@amazon.com> <20191203065421.GA23032@lst.de> <20191203073447.GA23426@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191203073447.GA23426@lst.de> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191203_044357_418326_40A5DCBB X-CRM114-Status: GOOD ( 16.38 ) 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: "sagi@grimberg.me" , Chaitanya Kulkarni , "linux-nvme@lists.infradead.org" , "axboe@fb.com" , "Sangaraju, Someswarudu" , "kbusch@kernel.org" , "Singh, Balbir" 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 Tue, Dec 03, 2019 at 08:34:47AM +0100, hch@lst.de wrote: > On Tue, Dec 03, 2019 at 07:26:03AM +0000, Chaitanya Kulkarni wrote: > > On 12/02/2019 10:54 PM, hch@lst.de wrote: > > > I pretty much hate the set_capacity name to start with, so what about > > > a more descriptive name for new the helper? blk_set_capacity? > > > > Do we also need a blk_mq_ops or appropriate block layer callback > > capacity change function, so that file systems can register > > a callback function to take an appropriate action, e.g. > > rebuilding the metadata with new size ? > > > > If this make sense I'll be happy to take a look. > > Well, and op isn't going to help with file system notifications as > that goes the other way around. We'd probably need some way how > file systems can register a new callback into the existing block > device events framework that is used for media changes. I had this on my TODO List but one thing stopped my endeavors, having a "notifier" for resize is easy when we only grow the block-device, but what should the FS do when we shrink it? _______________________________________________ linux-nvme mailing list linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme