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Re: [Xen-devel] [PATCH, PV-GRUB DOC] Add details to PV-GRUB documentatio

To: Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] [PATCH, PV-GRUB DOC] Add details to PV-GRUB documentation
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Wed, 03 Mar 2010 15:04:33 -0800
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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: “If 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.”

So I guess for now we at least need to document that ext4 is not

Yes. It should also test the filesystem feature flags for features it doesn't support and give a useful error message (though I did finally work out how to use gdbsx while tracking this down).

  The long-term plan could probably be to PV-ize grub2 of

I suppose. At least Fedora's grub1 supports ext4 (it was the F12 installer which made this /boot); perhaps pvgrub needs a resync with upstream grub?


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