Just out of curiosity, could you let me know what kind of changes the kernel makes to the superblock without asking first! That sounds interesting<br><br><div class="gmail_quote">On Sun, May 11, 2008 at 12:59 AM, Eric Sandeen <<a href="mailto:sandeen@redhat.com">sandeen@redhat.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d">Ahmed Kamal wrote:<br>
> Hi,<br>
> Just installed F9 preview and updated to latest. Rebooted everything was<br>
> fine. Today, I booted the system again, played with it for a few hours,<br>
> then I rebooted to test the "i915.modeset" (which is hyper cool thanks:)<br>
> Now when the machine came up, I got:<br>
> Primary superblock features different from backup: Check forced<br>
> This was on the root filesystem. It checked the FS, and finally said "**<br>
> Rebooting Linux **", at this stage I was fairly scared .. it looked like<br>
> a serious problem!<br>
> However, Fedora rebooted and it came up just fine!<br>
><br>
> Well, I have no idea what just happened<br>
<br>
</div>It should be fine.<br>
<br>
Most recent e2fsprogs enforces that feature flags in backups match those<br>
on the primary.<br>
<br>
Problem is, the kernel sets things on the fly, but does not update the<br>
backups. This is ... annoying... because then it causes the full fsck.<br>
<br>
I'm a little surprised that it did check though, because for now I have<br>
F9 carrying a patch to actually *disable* this test, because otherwise<br>
any F8->F9 upgrade would cause a full fsck just for this reason, which I<br>
think is overly aggressive.<br>
<br>
But, anyway, you should be fine now, and it shouldn't happen again. :)<br>
<br>
-Eric<br>
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