[Pkg-openldap-devel] Bug#866122: slapd-mtread crash on ppc64{, el} in stretch/sid

[Ryan Tandy]

On Sat, Jul 08, 2017 at 11:15:48AM -0700, Ryan Tandy wrote:
>The bug reproduces consistently when building with stretch's toolchain 
>and running stretch's kernel, but I have not seen it at all with 
>jessie's kernel *nor* in a jessie chroot on stretch's kernel. I have 
>also reproduced it with clang as well as gcc.

The newer compilers generate POWER8 vector instructions e.g. 
mtvsrd/mfvsrd while the older ones do not. A kernel bug related to (or 
triggered by) these instructions would meet the conditions I described. 
Howard suggested we could be looking at a kernel bug around FP/VSR 
save/restore.