On Mon, 24 Feb 2020 09:30:09 -0800 Dave Hansen <dave.hansen@xxxxxxxxx> wrote: > On 2/22/20 1:00 AM, Mauro Carvalho Chehab wrote: > > - nompx [X86] Disables Intel Memory Protection Extensions. > > - See Documentation/x86/intel_mpx.rst for more > > - information about the feature. > > Thanks for finding this. > > But, it does make me wonder if we should remove it outright or leave a > stub reminding folks that "nompx" probably shouldn't be reused for a > while. Maybe something like: > > nompx [X86] Previously, disabled Intel Memory Protection > Extensions. Code removed in v5.6. > Is the concern that people might still be booting kernels with that option, even though it's gone? If that's the case, probably what should really happen is a check within the code to issue a warning telling those users that MPX is an ex-parrot. That would also have the effect of deterring reuse... ? Thanks, jon
