[RFC][patch 0/6] CART Implementation ver 2

[a.p.zijlstra@chello.nl]

Hi All,

Marcelo was ofcourse right, and I needed to do scary stuff to 
avoid calling page_referenced() while holding zone->lru_lock.
Thanks Rik for making my thik head see that :-)

So here is an update of my code.

Changes:
 - Changed the hash algo. for the nonresident buckets
   It is worse now, so it has to change again :-(
 - Made the nonresident code blank out a paged in cookie.
 - Rewrote the cart code (yet again) to work on temp lists
   much like refill_inactive and co.

I put all that code in cart.c instead of swap.c to get a clearer 
distinction on what was general page reclaim logic and what was
part of the page cache.

Just before mailing (and ofcourse untested) I changed the calls to 
cart_rebalance_*() to take nr_dst/2 + 1 as target because I got
too much OOMs, no idea if this solved it. When i put nr_scan = 
sc->swap_cluster_max (in shrink_cache) I go no OOMs, work left there.


Kind regards,

Peter Zijlstra

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