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SubjectRe: [PATCH] x86_64: early memtest to find bad ram
On Fri, Mar 21, 2008 at 03:29:19PM +0100, Ingo Molnar wrote:
> * 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.,
> etc.)

It may even make sense to merge in the full memtest86. The code is small
(both source and binary) and IIRC it shares a lot of init code with x86.
The remaining problem would then be how to maintain its tests up do date.


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