Re: Compatible Debian PPC64 B.E for L.E servers
On 10/26/20 5:30 PM, Lennart Sorensen wrote:
> On Mon, Oct 26, 2020 at 05:04:48PM +0100, John Paul Adrian Glaubitz wrote:
>> I had to re-read this several times and just to be clear: You can still
>> run big-endian code perfectly fine on POWER8 machines and newer (unless
>> IBM removed support with POWER10).
>
> You can, but it seems very few people do. I have not read anything to
> indicate they were getting rid of big endian support. Hopefully not.
IBM maintains both little-endian and big-endian support in most projects
(LLVM, OpenJDK, the kernel, GCC, binutils etc), so no worry in this regard.
>> In fact, we are running the little-endian port on the POWER8 server we got
>> from IBM to host two ppc64 big-endian KVM VMs (one buildd and one Debian
>> porterbox). Although that causes the host kernel to crash regularly with
>> no fix in sight yet, unfortunately [1].
>
> Ouch, that's annoying given they claim that is supposed to work just fine.
Most likely because the crash happens for very specific use cases only, one
being a big-endian buildd on a little-endian host and building the same package
at the same time with the testsuite running (we have two buildd instances per
buildd host on fast machines).
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - glaubitz@debian.org
`. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
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