On Sat, Nov 7, 2020 at 9:17 PM Dmitry Safonov [off-list ref] wrote:

Started from discussion [1], where was noted that currently a couple of
architectures support mremap() for vdso/sigpage, but not munmap().
If an application maps something on the ex-place of vdso/sigpage,
later after processing signal it will land there (good luck!)

Patches set is based on linux-next (next-20201106) and it depends on
changes in x86/cleanups (those reclaim TIF_IA32/TIF_X32) and also
on my changes in akpm (fixing several mremap() issues).

Logically, the patches set divides on:
- patch       1: cleanup for patches in x86/cleanups
- patches  2-11: cleanups for arch_setup_additional_pages()

I like these cleanups, although I think you should stop using terms
like "new-born".  A task being exec'd is not newborn at all -- it's in
the middle of a transformation.

--Andy

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