Received: by 2002:a05:6a10:af89:0:0:0:0 with SMTP id iu9csp2734256pxb; Mon, 31 Jan 2022 03:11:14 -0800 (PST) X-Google-Smtp-Source: ABdhPJy5TEoY0oJ/XdHOCD9HuhP0vqLInuhiIH1lD5hNE4ThfgWBunnDqaTLzjAsvBmNnkaiRrLE X-Received: by 2002:a63:1d4a:: with SMTP id d10mr16495344pgm.92.1643627473821; Mon, 31 Jan 2022 03:11:13 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1643627473; cv=none; d=google.com; s=arc-20160816; b=XI/0Ck71KaYz93LljbI2XaKa2Kb9Xc0BTMtQNhtAEQVSiJbZX4HrLlm6QmeI2fIrOS nEnbmzGIbyTr4g5A6fi0xHXJMDeRzZAO/3Igh31GfH8dRuLU23nNkp+Idy93owGEpEZz wEx6+/sB2MsdE3v3x89grrQ2pNstFfJh01anzBq6P8S8NCAzHI8TgeUsh/xnMr01T2cf 1P1ygPsh6cv2J/hvHrliEjfxICKHJu98KEchCetBvxdeHZgZDg7xW0WuGik8YdpFZWXD ZulF5Fe1JcllsClZjdELtHCUTXtvm5nExAUdOhR0gEbErA2La7Dm5pnG9gs4A9tjjFEs FRJA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:from:user-agent:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:date :dkim-signature:dkim-filter; bh=nNg02Uu/Q9xr+yqv0U4aSVILKOdLFyDzWORM+NfLER8=; b=rJ38IQ5H6rjXaFdEyQTGOpyKYDoBh3+q4SWtEENYRrXlGE1NzN7jcdLx2CJev7anot 6ipCefxHkMBiI6p5g1tpk2EIn62s3aT1OxEzxOr5i9qKMXKCeMpL3H0NlFzUq0If+B5M AmaVKz7I1wXoeQXw505VJrcbdMstqTJXhPvRulHVkCq6Qc5PykqkltyerIwHPobIq9Hp PhnMH94LDoi1E4xca2Vbad/ggYbvFkXWftqFnB4COjaX9no+/t8Wtrv8NPgAlYNADjce JK6Gol4srAUIJepBr5bU4CbjpRPdknM/3+ynBS6q75xbBMYw/LcDi2vWT8k+wZbCiEsv mptQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@fieldses.org header.s=default header.b=rwucTQIp; spf=pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id 134si13698701pgb.40.2022.01.31.03.11.00; Mon, 31 Jan 2022 03:11:13 -0800 (PST) Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@fieldses.org header.s=default header.b=rwucTQIp; spf=pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348160AbiA1PDh (ORCPT + 99 others); Fri, 28 Jan 2022 10:03:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51072 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347423AbiA1PDf (ORCPT ); Fri, 28 Jan 2022 10:03:35 -0500 Received: from fieldses.org (fieldses.org [IPv6:2600:3c00:e000:2f7::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2E54EC061714 for ; Fri, 28 Jan 2022 07:03:35 -0800 (PST) Received: by fieldses.org (Postfix, from userid 2815) id 5B43C6801; Fri, 28 Jan 2022 10:03:34 -0500 (EST) DKIM-Filter: OpenDKIM Filter v2.11.0 fieldses.org 5B43C6801 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fieldses.org; s=default; t=1643382214; bh=nNg02Uu/Q9xr+yqv0U4aSVILKOdLFyDzWORM+NfLER8=; h=Date:To:Cc:Subject:References:In-Reply-To:From:From; b=rwucTQIpeFtYJbv8ppUXcIILZ5A0jp3HzeSk7ce4yvH3A8faqTNgX+04N28wzJ/pK cfsvSbqpz7fFjDuYbaAchTny6hvAOkHsWol1dVFI4EPtil/Los6O7KuaZtLUZv30Ew CBa0UKxHqR+J1G5HQxzQgyoxrgBNU2Oq1DQ0aO8A= Date: Fri, 28 Jan 2022 10:03:34 -0500 To: Chuck Lever III Cc: Neil Brown , Linux NFS Mailing List Subject: Re: [RFC PATCH 0/4] nfsd: allow NFSv4 state to be revoked. Message-ID: <20220128150334.GD14908@fieldses.org> References: <164325908579.23133.4781039121536248752.stgit@noble.brown> <7B388FE8-1109-4EDD-B716-661870B446C7@oracle.com> <164332328424.5493.16812905543405189867@noble.neil.brown.name> <164334386787.5493.637178363398104896@noble.neil.brown.name> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) From: bfields@fieldses.org (J. Bruce Fields) Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org On Fri, Jan 28, 2022 at 01:46:45PM +0000, Chuck Lever III wrote: > My initial impulse is to better understand what is preventing > the unexported filesystem from being unmounted. Better > observability there could potentially be of value. In theory that information's in /proc/fs/nfsd/clients/. Somebody could write a tool to scan that for state referencing a given filesystem. --b.