Messages in this thread |  | | | Date | Fri, 18 Aug 2006 14:54:29 +0400 | | From | Kirill Korotaev <> | | Subject | Re: [ckrm-tech] [RFC][PATCH 5/7] UBC: kernel memory accounting (core) |
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Andi Kleen wrote: >>I don't see any good way around that. For the page struct it is a >>material issue, for the others its not a big deal providing we avoid >>accounting dumb stuff like dentries. >> >>At the VM summit Linus suggested one option for user page allocation >>tracking would be to track not per page but by block of pages (say the >>2MB chunks) and hand those out per container. That would really need the >>defrag work though. > > > One could always use a second set of arrays, mirroring mem_map which one do you prefer: - having a pointer on the struct page? kernels without resource accounting won't have this.
- having a mirroring mem_map? on i686 it is easy, but not sure about sparse mem or numa configurations. advantage: run-time configurable on boot time. disadvantage: much lower performance with accounting.
- address_space/anon_vma can be replaced with some kind of proxy object with 2 pointers - address_space and ub. however I don't see how it is better then a single ptr on page.
Thanks, Kirill
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