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SubjectRe: Testing RAM from userspace / question about memmap= arguments
Pavel Machek wrote:
> memtest has following problems:
>
> 0) it is kind of hard to run memtest over ssh
>

It's kind of hard to run anything over SSH if it has to be run before
userspace is up. But the kernel can collect results from a modified
memtest, after it chains back.

> 1) if linux fixes some problem with PCI quirk or microcode
> upload, memtest will not see the fix
>

What are you saying? Linux is going to fix faulty RAM? The point with
testing RAM is you *want* to see it fail; you don't want Linux to fix it.

> 2) if memory only fails while something else happens (DMA to
> other piece of memory? Hard disk load glitching powre
> supply?), memtest will not see the problem.

These are not RAM faults. The very last thing you want is evidence that
you've got a faulty piece of RAM when the fault is actually a hard disk
glitch!


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