From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail02.iobjects.de ([188.40.134.68]:40228 "EHLO mail02.iobjects.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932282AbcE2SDV (ORCPT ); Sun, 29 May 2016 14:03:21 -0400 Received: from tux.wizards.de (p4FF5801B.dip0.t-ipconnect.de [79.245.128.27]) by mail02.iobjects.de (Postfix) with ESMTPSA id A2AFB4160166 for ; Sun, 29 May 2016 20:03:18 +0200 (CEST) Received: from [192.168.100.223] (ragnarok [192.168.100.223]) by tux.wizards.de (Postfix) with ESMTP id 2A31411C01E1 for ; Sun, 29 May 2016 20:03:18 +0200 (CEST) Subject: Re: Hot data tracking / hybrid storage References: <20160516010524.7e208f96@jupiter.sol.kaishome.de> <0d68f988-e117-4b61-cb9b-d18a26e2b909@gmail.com> <20160517203335.5ff99a05@jupiter.sol.kaishome.de> <20160519200926.0a2b5dcf@jupiter.sol.kaishome.de> <1c1358af-4549-618a-c408-b93832d33225@gmail.com> <9bde1aa8-fac5-34c4-dffc-0bf15d86c008@gmail.com> <574A8AFF.7020606@gmail.com> To: linux-btrfs From: =?UTF-8?Q?Holger_Hoffst=c3=a4tte?= Message-ID: <574B2EE6.6080402@applied-asynchrony.com> Date: Sun, 29 May 2016 20:03:18 +0200 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 05/29/16 19:53, Chris Murphy wrote: > But I'm skeptical of bcache using a hidden area historically for the > bootloader, to put its device metadata. I didn't realize that was the > case. Imagine if LVM were to stuff metadata into the MBR gap, or > mdadm. Egads. On the matter of bcache in general this seems noteworthy: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4d1034eb7c2f5e32d48ddc4dfce0f1a723d28667 bummer.. Holger