Re: [PATCH] mm: mincore: add hwpoison page handle

[Johannes Weiner]

On Wed, Nov 12, 2014 at 11:39:29AM +0800, Weijie Yang wrote:
> When encounter pte is a swap entry, the current code handles two cases:
> migration and normal swapentry, but we have a third case: hwpoison page.
> 
> This patch adds hwpoison page handle, consider hwpoison page incore as
> same as migration.
> 
> Signed-off-by: Weijie Yang <weijie.yang@xxxxxxxxxxx>

The change makes sense:

Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>

But please add a description of what happens when a poison entry is
encountered with the current code.  I'm guessing swap_address_space()
will return garbage and this might crash the kernel?
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