From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f46.google.com ([209.85.220.46]:57890 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752164Ab2KEXsE (ORCPT ); Mon, 5 Nov 2012 18:48:04 -0500 Received: by mail-pa0-f46.google.com with SMTP id hz1so4298408pad.19 for ; Mon, 05 Nov 2012 15:48:03 -0800 (PST) Message-ID: <50985030.6020804@gmail.com> Date: Tue, 06 Nov 2012 07:48:00 +0800 From: ching MIME-Version: 1.0 To: "linux-btrfs@vger.kernel.org" Subject: Re: btrfs defrag problem References: <508FBE50.6070300@gmail.com> <20121031004027.GE3102@twin.jikos.cz> <50919550.3090800@gmail.com> <20121105225716.GO3102@twin.jikos.cz> In-Reply-To: <20121105225716.GO3102@twin.jikos.cz> Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 11/06/2012 06:57 AM, David Sterba wrote: > On Thu, Nov 01, 2012 at 05:17:04AM +0800, ching wrote: >>>> 3. Is any possible to online defrag a btrfs partition without hindered by mount point/polyinstantied directories? >>> Sorry, I do not understand the question. >> when a device is mounted under a directory, files in the directory is "hidden", and files in the device is "available", right? >> when a directory is polyinstantied, files in the original directory is "hidden", and files in the polyinstantied directory is "available", >> >> How to get past them and pass those "hidden" files to defrag command? > I hope I get it right, so unless you have a reference to the directory > with hidden files (using your term), there's no way to access them. And > this is a more generic question, not related to btrfs itself. The hidden > files may also belong to a different filesystem. > > david > thank for your explanation ching