Received: by 2002:ac0:a5a7:0:0:0:0:0 with SMTP id m36-v6csp223985imm; Thu, 26 Jul 2018 17:34:08 -0700 (PDT) X-Google-Smtp-Source: AAOMgpdTPmoyso0zBTsV0acGlVl0BOnw/A67R0pnCZpRI32giJ8EyGhgkDjf9Z6rlNH6gOkRUld0 X-Received: by 2002:a62:9541:: with SMTP id p62-v6mr4250472pfd.152.1532651648454; Thu, 26 Jul 2018 17:34:08 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1532651648; cv=none; d=google.com; s=arc-20160816; b=zdMjVecPNplTWaZxxhZmOjbGFQNM7O4w0gAfnHErrnaG7pys1Bq/t3NfxgYnhVvN3v uF4PnJa8kMh9s8CbvPTCukIRJmZx/27JJKUGZHCGvCIvOj7DiXkbrStUIi+hDRk6HUMC 8Ci9twG7IwEpPPNPx7Z9mG3H6SfQ2gvLScDaTi3ky9eVvmFWhP262+JBvwhYrOzxlsEM 5HTObHLBbkmsuIS4HlaWogfIGfSFVo/4zHUbIjN2FgvqDu4C1OYbHtMVP8/X0FfvP0cM IvPH2AReoEDZKDbaA1/exJM0esPkNZ4FTi6+9le+OlZUKOpDcMfYQPHkIIA40x1kK1eS O5YQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:user-agent:references :message-id:in-reply-to:subject:cc:to:from:date :arc-authentication-results; bh=LvsYRhfjbs9NTuhfS2XXIVr46OMcn+1s7t42/+o02w4=; b=dV879JAjiLokahSYMo6YDSFVCK/pWXnxqqvkdxdMAgUlQgH050ZxBP1WGvbN/9CpQF aGy6PTLjR6+VndG4b/f2NulX7JQZDZ5spqfd6lsRw/ZyatEmDnJPsAPH88yy3iRvVzdB kucAKGSzj32L1mEbanvxT5s9FBJ7FwPq5F/lS6Jli6TAXVDKpRTznUs9g77UwMdN1mpn Ng0bLr8r/24AB17891YxZreOSxD+gZ7uGVVGbEgoc+7n7uYhvS5kHY5ncRfe1vgl2Qm5 EuzFJcccouJlVelQdZ1tooOjNoSUabKGWXwWUeOHPjFKYdLOk27LfSyVPhePP9tEfDj3 J8GA== 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 d16-v6si2598501pfe.267.2018.07.26.17.33.42; Thu, 26 Jul 2018 17:34:08 -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 S1731945AbeG0Bvg (ORCPT + 99 others); Thu, 26 Jul 2018 21:51:36 -0400 Received: from trent.utfs.org ([94.185.90.103]:34210 "EHLO trent.utfs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731855AbeG0Bvg (ORCPT ); Thu, 26 Jul 2018 21:51:36 -0400 X-Greylist: delayed 415 seconds by postgrey-1.27 at vger.kernel.org; Thu, 26 Jul 2018 21:51:35 EDT Received: from localhost (localhost [IPv6:::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by trent.utfs.org (Postfix) with ESMTPS id DD43660145; Fri, 27 Jul 2018 02:25:26 +0200 (CEST) Date: Thu, 26 Jul 2018 17:25:26 -0700 (PDT) From: Christian Kujau To: Gao Xiang cc: linux-kernel@vger.kernel.org Subject: Re: [PATCH 00/25] staging: erofs: introduce erofs file system In-Reply-To: <1532607728-103372-1-git-send-email-gaoxiang25@huawei.com> Message-ID: References: <1527764767-22190-1-git-send-email-gaoxiang25@huawei.com> <1532607728-103372-1-git-send-email-gaoxiang25@huawei.com> User-Agent: Alpine 2.21.999 (DEB 277 2018-05-20) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 26 Jul 2018, Gao Xiang wrote: > EROFS file system is a read-only file system with compression > support designed for certain devices (especially embeded > devices) with very limited physical memory and lots of memory Out of curiousity, and as Richard already asked[0] - what about existing file system, why can't they be used or extended instead of introducing yet another file system into the kernel? JFFS2? UBIFS? CramFs? SquashFS? ROMFS? F2FS? YAFFS? Christian. [0] https://marc.info/?l=linux-kernel&m=152783930418348&w=2 -- BOFH excuse #247: Due to Federal Budget problems we have been forced to cut back on the number of users able to access the system at one time. (namely none allowed....)