> Hm. I think this part is not correct: you collapse temp thp page
> into real one only for current procees. What will happen if a process with
> temp thp pages was forked?
That's a scenario that I hadn't yet addressed, but definitely something
I'll consider going forward. I think we can come up
I know almost nothing about thp, unlikely I understand this patch
correctly...
But, afaics, the main idea is that until we have mm->thp_threshold
faults we install the tail pages of temp_hugepage->page as a normal
anonymous page, then we actually add the Head/Tail metadata and add
the necessary hu
Alex Thorlton wrote:
> + /*
> + * now that we've done the accounting work, we check to see if
> + * we've exceeded our threshold
> + */
> + if (temp_thp->ref_count >= mm->thp_threshold) {
> + pmd_t pmd_entry;
> + pgtable_t pgtable;
> +
> +
This patch implements the functionality we're really going for here.
It adds the decision making behavior to determine when to grab a
temporary compound page, and whether or not to fault in single pages or
to turn the temporary page into a THP. This one is rather large, might
split it up a bit mor
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