* jglisse@xxxxxxxxxx <jglisse@xxxxxxxxxx> wrote:
> From: Jérôme Glisse <jglisse@xxxxxxxxxx>
>
> With commit af2cf278ef4f we no longer free pud so that we do not
> have synchronize all pgd on hotremove/vfree. But the new 5 level
> page table patchset reverted that for 4 level page table.
>
> This patch restore af2cf278ef4f and disable free_pud() if we are
> in the 4 level page table case thus avoiding BUG_ON() after hot-
> remove.
>
> af2cf278ef4f x86/mm/hotplug: Don't remove PGD entries in remove_pagetable()
Am I correct that the _real_ buggy commit that introduced the breakage in v4.12
is:
f2a6a7050109: ("x86: Convert the rest of the code to support p4d_t")
... right?
Thanks,
Ingo
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