From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeremy Fitzhardinge Subject: Re: [PATCH, PV-GRUB DOC] Add details to PV-GRUB documentation Date: Wed, 03 Mar 2010 15:04:33 -0800 Message-ID: <4B8EEB01.9080600@goop.org> References: <20100303194507.GA5920@const.famille.thibault.fr> <4B8EE74F.1000703@goop.org> <20100303225934.GE5920@const.famille.thibault.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20100303225934.GE5920@const.famille.thibault.fr> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Samuel Thibault , xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On 03/03/2010 02:59 PM, Samuel Thibault wrote: > According to the ext4 howto, once extents are enabled, the filesystem > can not be mounted by ext2/3 tools: =E2=80=9CIf you convert your root > filesystem ("/") to ext4, and you use the GRUB boot loader, you will > need to install a version of GRUB which understands ext4. Your system > may boot OK the first time, but when your kernel is upgraded, it will > become unbootable.=E2=80=9D > > So I guess for now we at least need to document that ext4 is not > supported. Yes. It should also test the filesystem feature flags for features it=20 doesn't support and give a useful error message (though I did finally=20 work out how to use gdbsx while tracking this down). > The long-term plan could probably be to PV-ize grub2 of > course... > =20 I suppose. At least Fedora's grub1 supports ext4 (it was the F12=20 installer which made this /boot); perhaps pvgrub needs a resync with=20 upstream grub? J