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    SubjectRe: [PATCH ] VMSPLIT config options (with default config fixed)
    Jan Engelhardt wrote:
    >
    > This sort of testing reminds me of Linus's 100->1000 Hz change
    > ("I chose 1000 originally partly as a way to make sure that people that
    > assumed HZ was 100 would get a swift kick in the pants.")
    >
    > Could we also do that with VMSPLIT?
    > ("Let's choose VMSPLIT_2G to make sure that i386-people that assumed
    > PAGE_OFFSET was 0xC0000000 would get...")

    Mmm.. bad idea. As much as I'd like the default to be 3GB_OPT, that would
    be a big impact to userspace, and there's no point in breaking everyone's
    machines when advanced users can just reconfig/recompile to get what they want.

    >> Hm, I wonder if we could have a more fine-grained choice of the
    >> boundary? There are also systems around with e.g. 1.25G or 1.5G of
    >> main memory.
    >>
    > Maybe something like:
    > config VMSPLIT_1G
    > bool "1G/3G user/kernel split"
    > config VMSPLIT_X
    > bool "Manual split"
    > endchoice
    ...

    Yes, that looks like a good idea.

    Cheers
    -
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