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Re: installation success using 3.0.16 on iBook Dual USB / HOWTO

On Sun, Nov 11, 2001 at 06:17:13AM -0900, Ethan Benson wrote:
> On Sun, Nov 11, 2001 at 04:00:24PM +0100, Michael Schmitz wrote:
> > > > What did you do in mac-fdisk to get a kernel panic? What kernel version
> > > > did you use?
> > >
> > > Ethan told me on IRC that this is a known problem with all PowerPC
> > > kernels to date.  Apparently there is a race condition involved in
> > > (re-)reading the partition table from a drive.
> > 
> > Imagine my surprise - I thought it might be a mac-fdisk bug (though I'm
> > sure it never happened to me).
> ive only seen it occur on a G4 i was setting up, it seems most common
> on SMP boxes, but happens occasionally on everything from oldworld
> crap to the newest tibook/ibook2s/G4s.
> > What kernel versions are affected? Maybe it's possible to sync before
> > rereading the partition table or something?
> 2.*.* kernels are affected.  and this always happens AFTER the new
> partition table is already completly synced to disk, once you reboot
> your partition table is just fine, just as you wanted it to be when
> you pressed the `w' command.  the panic is clearly caused by the
> `reread partition table ioctl'  

So what happens exactly?  Can you reproduce this on something and decode
the oops?  Looking in 2.4.15-pre2 I don't see the mac partition table
stuffs not doing something the msdos ones do..

Tom Rini (TR1265)

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