Re: marching through all physical memory in software

[Chris Friesen]

Arjan van de Ven wrote:
> On Mon, 26 Jan 2009 09:38:13 -0600
> "Chris Friesen" <cfriesen@xxxxxxxxxx> wrote:
>
> > Someone is asking me about the feasability of "scrubbing" system
> > memory by accessing each page and handling the ECC faults.
>
> Hi,
>
> I would suggest that you look at the "edac" subsystem, which tries to
> do exactly this....

Looking at the current -git code, there appears to be an option for 
memory controllers to do this (the set_sdram_scrub_rate() routine), but 
there don't appear to be any controllers that can actually do it.

edac appears to currently be able to scrub the specific page where the 
fault occurred.  This is a useful building block, but doesn't provide 
the ability to march through all of physical memory.

Chris

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/