Re: [PATCH 2/2] Futex non-page-pinning fix

[Andrew Morton]

Hugh Dickins <hugh@xxxxxxxxxxx> 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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