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Rik van Riel wrote: > Dave Hansen wrote: > >> My main thought is that _everybody_ is going to have to live with the >> entry in the 'struct page'. Distros ship one kernel for everybody, and >> the cost will be paid by those not even using any kind of resource >> control or containers. > > > Every userspace or page cache page will be in an object > though. Could we do the pointer on a per object (mapping, > anon vma, ...) basis? in this case no memory fractions accounting is possible :/ please, note, this field added by this patchset is in union and used by user pages accounting as well. > Kernel pages are not using all of their struct page entries, > so we could overload a field. yeah, we can. probably mapping. but as I said we use the same pointer for user pages accounting as well. > It all depends on how much we really care about not growing > struct page :) so what is your opinion? Kernel compiled w/o UBC do not introduce additional pointer. Thanks, Kirill - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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