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    SubjectRe: [PATCH] x86_64: early memtest to find bad ram
    Yinghai Lu wrote:
    > On Fri, Mar 21, 2008 at 6:08 AM, H. Peter Anvin <hpa@zytor.com> wrote:
    >> Ingo Molnar wrote:
    >> >
    >> > very nice patch! I always thought that this was the proper way to do
    >> > memtest - and we could in fact also do something like this after SMP
    >> > bringup, and hit the memory bus via multiple CPUs. [that will need a
    >> > different enumeration though than e820 maps]
    >> >
    >> > one structural observation: please make this unified functionality, so
    >> > that 32-bit kernels can make use of it too.
    >> >
    >>
    >> Indeed. Of course, it would also be nice if distros shipped
    >> bootloader-invoked prekernel test software, like memtest86+, by default.
    >
    > the current memtest86 is running in 32 bit mode, and only support 64G ram.
    >
    > I tried to expand that a bit, to support 1024g, but it only works on
    > some machine.
    > could be stack provide is not big enough?
    >

    Wonder how hard it would be to make it run 64 bits...

    -hpa


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