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SubjectRe: [PATCH] mm: poison struct page for ptlock
Hugh Dickins <hugh@veritas.com> wrote:
>
> Suppress split ptlock on arches which may use one page for multiple page
> tables. Reconsider what better to do (particularly on ppc64) later on.

But why is that a problem per-se? A few "pagetable pages" will share the
same lock. Deadlocky when we take two pagetable locks?

The code ran OK on ppc64, fwiw.

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