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SubjectRe: [PATCH 0/12] memcg updates v5
KAMEZAWA Hiroyuki wrote:
> Hi, I updated the stack and reflected comments.
> Against the latest mmotm. (rc7-mm1)
>
> Major changes from previous one is
> - page_cgroup allocation/lookup manner is changed.
> all FLATMEM/DISCONTIGMEM/SPARSEMEM and MEMORY_HOTPLUG is supported.
> - force_empty is totally rewritten. and a problem that "force_empty takes long time"
> in previous version is fixed (I think...)
> - reordered patches.
> - first half are easy ones.
> - second half are big ones.
>
> I'm still testing with full debug option. No problem found yet.
> (I'm afraid of race condition which have not been caught yet.)
>
> [1/12] avoid accounting special mappings not on LRU. (fix)
> [2/12] move charege() call to swapped-in page under lock_page() (clean up)
> [3/12] make root cgroup to be unlimited. (change semantics.)
> [4/12] make page->mapping NULL before calling uncharge (clean up)
> [5/12] make page->flags to use atomic ops. (changes in infrastructure)
> [6/12] optimize stat. (clean up)
> [7/12] add support function for moving account. (new function)
> [8/12] rewrite force_empty to use move_account. (change semantics.)
> [9/12] allocate all page_cgroup at boot. (changes in infrastructure)
> [10/12] free page_cgroup from LRU in lazy way (optimize)
> [11/12] add page_cgroup to LRU in lazy way (optimize)
> [12/12] fix race at charging swap (fix by new logic.)
>
> *Any* comment is welcome.

Kame,

I'm beginning to review test the patches now. It would be really nice to split
the development patches from the maintenance ones. I think the full patchset has
too many things and is confusing to look at.


--
Balbir


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