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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 A2642C433E1 for ; Wed, 27 May 2020 13:33:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 80FE5207CB for ; Wed, 27 May 2020 13:33:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=lunn.ch header.i=@lunn.ch header.b="Kgft5gaH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388289AbgE0Ndm (ORCPT ); Wed, 27 May 2020 09:33:42 -0400 Received: from vps0.lunn.ch ([185.16.172.187]:52000 "EHLO vps0.lunn.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387730AbgE0Ndk (ORCPT ); Wed, 27 May 2020 09:33:40 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lunn.ch; s=20171124; h=In-Reply-To:Content-Type:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=opjoqZxCQdaB3EzLhcpxSqBTfSFuC3UOtI1l3JqnwoU=; b=Kgft5gaHZhY6Kt4LopUAPR1ibt iemlkwvFnSOxJ271VosIgscoX/KwtN7xZ/kuhmVq/CrBp6KE281qC0tv5OMou0Hw+rqgRrij29HCQ DV/oOV3I+Uk2wVTQGSfJ4hCiCskj0zzroOumECHC2x/r/e0C7rvWilX+xSTk/WUs3nc8=; Received: from andrew by vps0.lunn.ch with local (Exim 4.93) (envelope-from ) id 1jdwBB-003PI5-M7; Wed, 27 May 2020 15:33:09 +0200 Date: Wed, 27 May 2020 15:33:09 +0200 From: Andrew Lunn To: Emanuele Giuseppe Esposito Cc: Jakub Kicinski , kvm@vger.kernel.org, Christian Borntraeger , Paolo Bonzini , Jim Mattson , Alexander Viro , Emanuele Giuseppe Esposito , David Rientjes , Jonathan Adams , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-fsdevel@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH v3 0/7] Statsfs: a new ram-based file system for Linux kernel statistics Message-ID: <20200527133309.GC793752@lunn.ch> References: <20200526110318.69006-1-eesposit@redhat.com> <20200526153128.448bfb43@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net> <6a754b40-b148-867d-071d-8f31c5c0d172@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6a754b40-b148-867d-071d-8f31c5c0d172@redhat.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org > I don't really know a lot about the networking subsystem, and as it was > pointed out in another email on patch 7 by Andrew, networking needs to > atomically gather and display statistics in order to make them consistent, > and currently this is not supported by stats_fs but could be added in > future. Hi Emanuele Do you have any idea how you will support atomic access? It does not seem easy to implement in a filesystem based model. Andrew