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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 <> 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...


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