Re: vmscan-give-referenced-active-and-unmapped-pages-a-second-trip-around-the-lru.patch

[Rik van Riel <riel@redhat.com>]

Andrew Morton wrote:

> Which means that after vmscan-split-lru-lists-into-anon-file-sets.patch,
> shrink_active_list() simply does
> 
> 	while (!list_empty(&l_hold)) {
> 		cond_resched();
> 		page = lru_to_page(&l_hold);
> 		list_add(&page->lru, &l_inactive);
> 	}
> 
> yes?
> 
> We might even be able to list_splice those pages..

Not quite.  We still need to clear the referenced bits.

In order to better balance the pressure between the file
and anon lists, we may also want to count the number of
referenced mapped file pages.

That would be roughly a 3-line change, which I could
either send against a recent mmotm (is the one on your
site recent enough?) or directly to Linus if you are
sending the split LRU code upstream.

Just let me know which you prefer.

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