Re: [PATCH/RFC] Shared page tables

> > Tried to get this running with CONFIG_PTSHARE and CONFIG_PTSHARE_PTE on
> > s390x. Unfortunately it crashed on boot, because pt_share_pte
> > returned a broken pte pointer:
> 
> The patch as submitted only works on i386 and x86_64.  Sorry.

That's why I added what seems to be needed for s390. For CONFIG_PTSHARE and
CONFIG_PTSHARE_PTE it's just a slightly modified Kconfig file.
For CONFIG_PTSHARE_PMD it involves adding a few more pud_* defines to
asm-generic/4level-fixup.h.
Seems to work with the pmd/pud_clear changes as far as I can tell.

Just tested this out of curiousity :)

Thanks,
Heiko
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