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SubjectRe: find_get_swapcache_page() question
On Tue, 28 Aug 2001, Hugh Dickins wrote:

> if (!PageSwapCache(found))
> BUG();
> if (found->mapping != &swapper_space)
> BUG();
> are not safe, since there may a concurrent remove_from_swap_cache(),
> either from try_to_unuse() or from Rik's new vm_swap_full() deletion.
> Those tests would be safe if the page were locked, but it's not.

vm_swap_full() is called with the page locked,
remove_from_swap_cache() also seems to want the
page locked...

Rik
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