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SubjectRe: Ubuntu Jaunty ext3 --> ext4 upgrade issue
Theodore Tso wrote:
> On Wed, Feb 18, 2009 at 11:10:38AM -0700, Tim Gardner wrote:
>> I've encountered a situation where the patches that you've proposed for
>> stable updates might be causing some issues. This user ivoks appears to
>> have an upgrade issue. I assume he's enabled ext4 on an existing ext3
>> file system. Hopefully I can get more details. Have you seen anything
>> like this?
> No, this is the first I've heard of it.
>> <ivoks> i'm getting 'Invalid or unsupported executable format' from grub
>> on all jaunty's generic kernels since (including) 2.6.28-7
> So grub is complaining that it can't boot from a partition after
> upgrading to the new kernel with the for-stable patches? Um, that's
> interesting. So the obvious thing to check is to do an md5 checksum
> of the kernel in /boot to make sure it didn't get corrupted somehow.
> The other thing to check would be to ask the user to run e2fsck to
> rule out filesystem corruption.
> OTOH, if this was just a simple install and upgrade, presumably the
> new kernel would have been installed while the previous kernel was
> booted.
> I do my testing by using a ext3 /boot partition (since my
> crash-and-burn netbook is running Ubuntu Jaunty). So I wouldn't have
> noticed anything, but this seems very odd.
> More information would be useful; is there a Launchpad bug open on this yet?
> Or we can work this out on LKML or the linux-ext4 mailing list if the
> reporter is willing to be cc'ed on the thread....
> - Ted

Here is the initial report:

I'll produce a test kernel for the user that has _all_ of the proposed
stable patches from your ext4/for-stable branch (including the jbd2 stuff).

Tim Gardner

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