Messages in this thread | | | Date | Tue, 16 Nov 2004 17:50:36 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: [RFC] Making compound pages mandatory |
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On Tue, 16 Nov 2004, David Howells wrote: > > Do you have any objection to compound pages being made mandatory, even without > HUGETLB support?
I haven't really looked into it, so I cannot make an informed decision. How big is the overhead? And what's the _point_, since we don't seem to need them normally, but the code is there for people who _do_ need them?
I don't generally like two paths, but quite frankly, I consider the non-compound case the regular case right now. How expensive does the compound pages end up being? Is it just one more pointer chase on every get_page/put_page, or what? Does anybody have numbers for before/after that are otherwise comparable?
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