From owner-freebsd-hackers@FreeBSD.ORG Mon Jun 2 16:37:17 2014 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id A5A2B892 for ; Mon, 2 Jun 2014 16:37:17 +0000 (UTC) Received: from mail-pd0-x234.google.com (mail-pd0-x234.google.com [IPv6:2607:f8b0:400e:c02::234]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 532F72A1B for ; Mon, 2 Jun 2014 16:37:17 +0000 (UTC) Received: by mail-pd0-f180.google.com with SMTP id y13so3603675pdi.39 for ; Mon, 02 Jun 2014 09:37:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=delphix.com; s=google; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=bwzj8nSsmgJWdnVCwWtYZ4ZSvRs2oTN3S+7Jnk/tsRE=; b=Vsm+SJwWORZOynBmpld2S15HbEh1w8ABiaKvzU5ZkrKyHV5thOW0zGl/jTzPfzeMEd 91bFPRUN5XhSbls+JBvr/Y8W8Mearf8s+qLjdy3TAlJr8gwOqGLHjh+R3BwvsX8gLltP c2EzxNQYPfsJAfw6M4Tcx393AFOPhHCfob7Ds= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=bwzj8nSsmgJWdnVCwWtYZ4ZSvRs2oTN3S+7Jnk/tsRE=; b=bSiLmcCmUnoM8fT/abAi3lEh46nSCI6Xkqb7cLycDfiCG3legWUqBk8TG+UKKE5i++ tfUFqWxX/55apq0drX3+MQa/hFRVFtblcexf/SL48ISLQ6ZXp9N+igrpB5paiDuGuFA2 Ybbe1/rJ6aXuWaPcd+uVM1keS6tl73bXuK9+wG6LlUOb2gZKJi2OVA48So6SjBjHwsTr GpBGS2ZeYffbjkTvEA3nNr/i18S8z27N3EiiVlY/uZvc0UzvTrkPGbiiuMu1hYIFuQUC Ecf7xhe9aCnZMmh4UU/LzPJ7ZQqgVOcGDRJeeQExUs39f61nX+1IvM3mQbLP3M+GIJJz Mu9g== X-Gm-Message-State: ALoCoQlS+uX9tY60z/5R+4lRBN4sS8y52GtgHdrruPVxY8IiCSqw7cOZo9eYe8ciEld0ui801gbQ MIME-Version: 1.0 X-Received: by 10.68.164.100 with SMTP id yp4mr41222247pbb.136.1401727036804; Mon, 02 Jun 2014 09:37:16 -0700 (PDT) Received: by 10.70.0.202 with HTTP; Mon, 2 Jun 2014 09:37:16 -0700 (PDT) In-Reply-To: <538C9207.9040806@freebsd.org> References: <20140601004242.GA97224@bewilderbeast.blackhelicopters.org> <3D6974D83AE9495E890D9F3CA654FA94@multiplay.co.uk> <538B4CEF.2030801@freebsd.org> <1DB2D63312CE439A96B23EAADFA9436E@multiplay.co.uk> <538B4FD7.4090000@freebsd.org> <538C9207.9040806@freebsd.org> Date: Mon, 2 Jun 2014 09:37:16 -0700 Message-ID: Subject: Re: fdisk(8) vs gpart(8), and gnop From: Matthew Ahrens To: Nathan Whitehorn X-Mailman-Approved-At: Mon, 02 Jun 2014 18:07:22 +0000 Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18 Cc: freebsd-fs , FreeBSD Hackers , Steven Hartland X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Jun 2014 16:37:17 -0000 On Mon, Jun 2, 2014 at 8:02 AM, Nathan Whitehorn wrote: > > My bigger concern is this pool upgrade one -- what if someone puts in a 4K > disk in the future? > > We could dynamically change the "effective ashift" by preferring to allocate multiples of 4K. This would involve some work in the space allocator. Again, I don't have time to do this right now but would be happy to mentor someone. --matt