On Mon, Sep 14, 2015 at 02:33:55PM -0700, Andrew Morton wrote:

On Mon, 14 Sep 2015 22:31:44 +0300 Ebru Akagunduz [off-list ref] wrote:

quoted

This patch introduces new sysfs integer knob
/sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_swap
which makes optimistic check for swapin readahead to
increase thp collapse rate. Before getting swapped
out pages to memory, checks them and allows up to a
certain number. It also prints out using tracepoints
amount of unmapped ptes.

We we please get this control documented? 
Documentation/vm/transhuge.txt appears to be the place for it.

I will add annotation about max_swap_ptes to doc and send it with new patch.

Kind regards,
Ebru

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