I'll do in following way in the next Monday.
Divide patches into 2 set
in early fix/optimize set.
- push (2)
- push (4)
- push (6)
- push (1)
drops (3).
I don't want to remove all? pages-never-on-LRU before fixing force_empty.
in updates
- introduce atomic flags. (5)
- add move_account() function (7)
- add memory.attribute to each memcg dir. (NEW)
- enhance force_empty (was (8))
- remove "forget all" logic. and add attribute to select following 2 behavior
- call try_to_free_page() until the usage goes down to 0.
This allows faiulre (if page is mlocked, we can't do.). (NEW)
- call move_account() to move all charges to its parent (as much as possible) (NEW)
In future, I'd liket to add trash-box cgroup for force_empty somewhere.
- allocate all page cgroup at boot (9)
- lazy lru free/add (10,11) with fixes.
- fix race at charging swap. (12)
After (9), all page and page_cgroup has one-to-one releationship and we want to
assume that "if page is alive and on LRU, it's accounted and has page_cgroup."
(other team, bio cgroup want to use page_cgroup and I want to make it easy.)
For this, fix to behavior of force_empty..."forget all" is necessary.
SwapCache handling is also necessary but I'd like to postpone until next set
because it's complicated.
After above all.
- handle swap cache
- Mem+Swap controller.
- add trashbox feature ?
- add memory.shrink_usage_to file.
It's long way to what I really want to do....
Thanks,
-Kame
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