Re: [PATCH 1/10] shmem: replace page if mapping excludes its zone

[Cong Wang]

On 05/15/2012 03:42 AM, Hugh Dickins wrote:
> I'm not going to rush the incremental patch to fix this: need to think
> about it quietly first.
>
> If you're wondering what I'm talking about (sorry, I don't have time
> to explain more right now), take a look at comment and git history of
> line 2956 (in 3.4-rc7) of mm/memory.c:
> 	if (unlikely(!PageSwapCache(page) || page_private(page) != entry.val))
> I don't suppose anyone ever actually hit the bug in the years before
> we added that protection, but we still ought to guard against it,
> there and here in shmem_replace_page().

Ok, I have no objections.

Thanks for your patches anyway!
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