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SubjectRe: [PATCH 2/2] Futex non-page-pinning fix
Hugh Dickins <hugh@veritas.com> wrote:
>
> But I disagree over move_to/from_swap_cache: nothing should
> be done there at all. Once you have mapping,index in struct
> futex_q, it's irrelevant what tmpfs might be doing to the
> page->mapping,page->index of the unmapped page.

But move_to_swap_cache() alters a page's ->mapping and ->index when that
page is potentially mapped into user pagetables.



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