From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1QLztr-0005kr-52 for garchives@archives.gentoo.org; Mon, 16 May 2011 15:40:03 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 1A2041C028; Mon, 16 May 2011 15:37:53 +0000 (UTC) Received: from mail-qw0-f53.google.com (mail-qw0-f53.google.com [209.85.216.53]) by pigeon.gentoo.org (Postfix) with ESMTP id CEEAB1C028 for ; Mon, 16 May 2011 15:37:52 +0000 (UTC) Received: by qwb7 with SMTP id 7so3055201qwb.40 for ; Mon, 16 May 2011 08:37:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:in-reply-to:references:from :date:x-google-sender-auth:message-id:subject:to:content-type; bh=M2vy2GTEI8JrIuR5Mcb1ABBQUQ6vi0BwcQUOTQTkCHs=; b=c7erVg8ahXcqzhp7Q4pYb3YQ2amS4ft3xEAFsjjhpXiKkkKMNfnuxFNNhhDiRxUnMF pYlOT8eMkuPYx0xZV3q49H8FxornXsyj08ALhc9/S+fIso1Ii+Kjt0JELgjXolex5BKv Vi+oD3JJBNrxcGwEKO8f1ur2BD9K7/vpDlcI0= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:content-type; b=f7Oab+1pXcdrRWwK0xjUzSJrjk/Z49OUVe6mu+ZlMVNkgunPl0yEEiWeKxnYA/jD/k MWYnJi5miatVgT+kzSIH4w+31jDfxdKBz1jGC0QbJ6beac34dz2xlN/cfzajiN3VKiP6 eTdJOL2y6B5BilsQ0tSszwRZEprNHBudYs22U= Received: by 10.224.9.77 with SMTP id k13mr3382911qak.1.1305560272250; Mon, 16 May 2011 08:37:52 -0700 (PDT) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Sender: paul.hartman@gmail.com Received: by 10.229.213.195 with HTTP; Mon, 16 May 2011 08:37:32 -0700 (PDT) In-Reply-To: References: From: Paul Hartman Date: Mon, 16 May 2011 10:37:32 -0500 X-Google-Sender-Auth: 7nfmpA_HYH8S12ygaSOupEWvObk Message-ID: Subject: Re: [gentoo-user] Double mount entry? To: gentoo-user@lists.gentoo.org Content-Type: text/plain; charset=ISO-8859-1 X-Archives-Salt: X-Archives-Hash: 00f0165a80e8bfcb45540b724d5104cc On Mon, May 16, 2011 at 6:45 AM, Pandu Poluan wrote: > What's rootfs? /usr/src/linux/Documentation/filesystems/ramfs-rootfs-initramfs.txt [snip] What is rootfs? --------------- Rootfs is a special instance of ramfs (or tmpfs, if that's enabled), which is always present in 2.6 systems. You can't unmount rootfs for approximately the same reason you can't kill the init process; rather than having special code to check for and handle an empty list, it's smaller and simpler for the kernel to just make sure certain lists can't become empty. Most systems just mount another filesystem over rootfs and ignore it. The amount of space an empty instance of ramfs takes up is tiny. [/snip]