Messages in this thread | | | Date | Fri, 26 Aug 2005 11:20:37 -0700 | From | Ross Biro <> | Subject | Re: process creation time increases linearly with shmem |
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On 8/26/05, Rik van Riel <riel@redhat.com> wrote: > > Filling in all the page table entries at the first fault to > a VMA doesn't make much sense, IMHO. > > > I suspect we would be better off without that extra complexity, > unless there is a demonstrated benefit to it.
You are probably right, but do you want to put in a patch that might have a big performance impact in either direction with out verifying it?
My suggestion is safe, but most likely sub-optimal. What everyone else is suggesting may be far better, but needs to be verified first.
I'm suggesting that we change the code to do the same work fork would have done on the first page fault immediately, since it's easy to argue that it's not much worse than we have now and much better in many cases, and then try to experiment and figure out what the correct solution is.
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