Bug#451805: linux-image-2.6.22-3-r4k-ip22 dies early on boot / Starting ELF64 kernel

[Thiemo Seufer <ths@networkno.de>]

Florian Lohoff wrote:
> On Fri, Nov 23, 2007 at 05:54:52PM +0000, Thiemo Seufer wrote:
> > > That's a decision Thiemo would have to make.  Thiemo, why is our IP22
> > > kernel 64 bit again?
> > 
> > The idea is to provide 64-bit kernels where possible, so n32/n64
> > can work alongside o32.
> 
> The errata Thomas ad-hoc found was for example that a double-word shift
> garbles an integer multiplication. This would cause an n32/n64
> userspace also to break in colorful ways if not compiled with these
> workarounds. So running 64bit on these kind of machines might be 
> too much hassle ...

Unless we use the compiler options mentioned before, which is probably
not sensible given the performance impcat for other machines.

However, keeping the kernel for IP22 at 64 bit sounds valuable to me,
as most machines can make use of it.


Thiemo