On Fri, Dec 13, 2019 at 03:28:38PM -0500, Stephen Smalley wrote: > I would have expected that two kernels built with the same config > with this enabled would have yielded different struct layouts in > pahole vmlinux output, but that doesn't appear to be the case. They > do have different seeds. Am I doing something wrong? > Also, does DEBUG_INFO_BTF effectively undermine/negate the benefits of this > change if enabled? There's currently a long-standing bug with the GCC plugin where the generated debug info is in declaration order, not build order (see: [1]). So, to verify it, try looking at the generated machine code. Planned Clang implementation of this feature does not have this bug. [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?format=multiple&id=84052 -- Dan Aloni
