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    SubjectRe: 2G memory split
    Linus Torvalds wrote:

    >On Tue, 10 Jan 2006, Martin Bligh wrote:
    >>The non-1GB-aligned ones need to be disbarred when PAE is on, I think.
    >Well, right now _all_ the non-3:1 cases need to be disbarred. I think we
    >depend on the kernel mapping only ever being the _one_ last entry in the
    >top-level page table, which is only true with the 3:1 mapping.
    >But I didn't check.

    No. It works fine (or seems to) with 2:2 mapping. I've tested with these
    and am shipping products on the 1U appliances with 2:2 and I have never
    seen any problems
    with 2.6.9-2.6.13.

    The only unpleasant side affect with 3:1 is user apps seem to rely on
    swap space
    a little more than I like -- perhaps this is the side affect you are
    referring to?

    RH ES uses 4:4 which is ideal and superior to this hack.


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      Last update: 2006-01-10 19:43    [W:0.037 / U:34.256 seconds]
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