Received: by 2002:a25:6193:0:0:0:0:0 with SMTP id v141csp674549ybb; Wed, 1 Apr 2020 07:42:09 -0700 (PDT) X-Google-Smtp-Source: ADFU+vsyVnYZYiNhudOMzu7i+eDSR/qFRKLGhSpYZ9uTpFWmYF+dahBRn/uNp1OqfldCPy+T3ugN X-Received: by 2002:a9d:6950:: with SMTP id p16mr16805047oto.199.1585752128767; Wed, 01 Apr 2020 07:42:08 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1585752128; cv=none; d=google.com; s=arc-20160816; b=nJ5asI6fbUhZDkqOEpZDf2gPaR6+JrNwkSBBAHSP2dCXbmXwsUlpuEHf3YnSCR5eX7 5MPHqU61tXbMSWhb/tgZU2dYskFPgJe3MlsCtSjWNQusnEyF/jYOZZEsjRWhpoLqj9fn v03h9wOaCaOe3kQjVCbGtoIOCriP214OcLKB2AYXn2nZ1IVyYo1qt2FuqDEpnarq/fsI ypGeJPwMfS3BYCoBjYDYzXe0qJ01175kInqWZcz333Ub3cl7V7eIYCDOAWQbRGDeIzIy cXQVCBEjuixLgXuP3+wfRLtTehxX+QKFuR7jgF3/sQChdTxZgEVB6aqSnj0CVCRlDL4v ziLg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date; bh=NH1O1Or760ZGsVvDnOJvuwHSKy2smkxOYZHwlMvQAqE=; b=W8bBtTywGg3QKvZVh6MGYe85Myy0OC2mgSuEBuiPVa1bXVxZ0G18GeG1uSnOO00YNc iq5E9qjCdOrJh1V4WZqdWsfUfFWhnTdNxFJvSb8sGAgfncuERV4asowifTEr9Z2yvhRS 3SNQUxyyADc4vXSvn+0+kLsLuzewe7hXpmN9mYyetslGs6S3b8Vv5Spt9Ygf/4/YTv5K r64sVMcOvkEsFnGgvL+nlqQlZar/Rr2mYb66v54DCobAfkXU6HAzoa1pKB0hL59b/8tR frNdf8+L4+n651i02XYRa4aOH4iKFlnBL5jqDSi36aoNjhq8VqSyTwhcDG4De5fDrzAK 28QA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id i6si979703oik.72.2020.04.01.07.41.55; Wed, 01 Apr 2020 07:42:08 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733034AbgDAOlN (ORCPT + 99 others); Wed, 1 Apr 2020 10:41:13 -0400 Received: from gardel.0pointer.net ([85.214.157.71]:49886 "EHLO gardel.0pointer.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726640AbgDAOlM (ORCPT ); Wed, 1 Apr 2020 10:41:12 -0400 Received: from gardel-login.0pointer.net (gardel.0pointer.net [IPv6:2a01:238:43ed:c300:10c3:bcf3:3266:da74]) by gardel.0pointer.net (Postfix) with ESMTP id 25D0AE814E8; Wed, 1 Apr 2020 16:41:10 +0200 (CEST) Received: by gardel-login.0pointer.net (Postfix, from userid 1000) id 9A065160704; Wed, 1 Apr 2020 16:41:09 +0200 (CEST) Date: Wed, 1 Apr 2020 16:41:09 +0200 From: Lennart Poettering To: David Howells Cc: Christian Brauner , torvalds@linux-foundation.org, viro@zeniv.linux.org.uk, dray@redhat.com, kzak@redhat.com, mszeredi@redhat.com, swhiteho@redhat.com, jlayton@redhat.com, raven@themaw.net, andres@anarazel.de, keyrings@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, cyphar@cyphar.com Subject: Re: Upcoming: Notifications, FS notifications and fsinfo() Message-ID: <20200401144109.GA29945@gardel-login> References: <20200330211700.g7evnuvvjenq3fzm@wittgenstein> <1445647.1585576702@warthog.procyon.org.uk> <2418286.1585691572@warthog.procyon.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2418286.1585691572@warthog.procyon.org.uk> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Di, 31.03.20 22:52, David Howells (dhowells@redhat.com) wrote: > Christian Brauner wrote: > > > querying all properties of a mount atomically all-at-once, > > I don't actually offer that, per se. > > Having an atomic all-at-once query for a single mount is actually quite a > burden on the system. There's potentially a lot of state involved, much of > which you don't necessarily need. Hmm, do it like with statx() and specify a mask for the fields userspace wants? Then it would be as lightweight as it possibly could be? Lennart -- Lennart Poettering, Berlin