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List:       grub-devel
Subject:    Re: xfsprogs 4.16.0 format change, GRUB error unknown filesystem
From:       Chris Murphy <lists () colorremedies ! com>
Date:       2018-05-15 22:09:44
Message-ID: CAJCQCtTvtRD=K-b+p-Kwn+hWfaUF2+6xU4pR7r+5UibtUKotkQ () mail ! gmail ! com
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On Tue, May 15, 2018 at 6:33 AM, Daniel Kiper <dkiper@net-space.pl> wrote:
> Hi,
>
> On Mon, May 14, 2018 at 01:12:27PM -0600, Chris Murphy wrote:
>> Hi,
>>
>> xfsprogs 4.16.0 defaults to enabling "sparse inode" which is not
>> compatible with GRUB.
>>
>> Downstream bug in Fedora, grub-probe fails so grub-install can't work;
>> and on systems with an already properly installed core.img with XFS
>> support, it can't read an XFS file system with this feature set.
>> https://bugzilla.redhat.com/show_bug.cgi?id=1575797
>>
>> Make them default
>> https://www.spinics.net/lists/linux-xfs/msg16598.html
>>
>> Change description, page 48
>> https://mirrors.edge.kernel.org/pub/linux/utils/fs/xfs/docs/xfs_filesystem_structure.pdf
>>
>> It'd be helpful to know the approximate time frame for getting this
>> fixed, to know whether for Fedora 29 /boot on XFS should be inhibited
>> until a proper tested patch for GRUB exists.
>
> Sorry, I do not have resources right now to do that. However,
> if somebody will post the patches I am happy to review them.

OK thanks for the update.

We appear to have a near term work around for the installer: if /boot
is XFS, then format with '-i sparse=0' which will avoid the problem.
Meanwhile / or /home still use the new default of sparse=1.


-- 
Chris Murphy

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