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SubjectRe: [PATCH] x86_64: early memtest to find bad ram

* H. Peter Anvin <> 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.

some do (Fedora for example), but it's still a bit quirky for users to
invoke and it would be nice to see those results in the kernel log as
well and flag possibly flaky systems that way. (add a taint bit, etc.,


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