Messages in this thread |  | | | Date | Fri, 30 Jan 2009 20:20:36 +0000 | | From | Tim Small <> | | Subject | Re: marching through all physical memory in software |
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Eric W. Biederman wrote: > A background software scrubber simply has the job of rewritting memory > to it's current content so that the data and the ecc check bits are > guaranteed to be in sync
Don't you just need to READ memory? The memory controller hardware takes care of the rest in the vast majority of cases.
You only need to rewrite RAM if a correctable error occurs, and the chipset doesn't support automatic write-back of the corrected value (a different problem altogether...). The actual memory bits themselves are refreshed by the hardware quite frequently (max of every 64ms for DDR2, I believe)... Cheers,
Tim.
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