Bad memory

[cornel panceac]

2013/1/18 Adam Jackson <ajax at redhat.com>

> On Fri, 2013-01-18 at 20:49 +0200, cornel panceac wrote:
>
>
> > 2013/1/18 Justin M. Forbes <jmforbes at linuxtx.org>
>
> >         There are a lof of reasons that this isn't feasible on a
> >         running system.
> >         You just don't have access to all of the memory for a full
> >         check.
> >
> >         Justin
> >
> > why not? is there something that can not be relocated in RAM?
>
> The kernel image itself.  DMA buffers.  Memory made inaccessible by PCI
> BARs being in the way.  Probably some other stuff I'm forgetting.  Even
> if you fixed all that you'd still be Heisenberg-uncertain because you'd
> no longer be the only thing exerting cache pressure.
>
> > on the other hand, wasn't there supposed to be a way to exclude a
> > damaged RAM area by passing some arguments to the kernel?
>
> See linux/Documentation/bad_memory.txt
>
> - ajax
>
>
>
> ok, thank you very much, ajax.
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