Messages in this thread | | | Date | Wed, 20 Apr 2011 17:35:30 +0200 | From | Borislav Petkov <> | Subject | Re: Background memory scrubbing |
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On Wed, Apr 20, 2011 at 05:19:41PM +0200, Clemens Ladisch wrote: > > Unfortunately in common with a large number of hardware platforms > > background scrubbing isn't supported in the hardware (even though ECC > > error correction is supported) and thus there is no BIOS option to > > enable it. > > Which hardware platform is this? AFAICT all architectures with ECC > (old AMD64, Family 0Fh, Family 10h) also have scrubbing support. > If your BIOS is too dumb, just try enabling it directly (bits 0-4 of > PCI configuration register 0x58 in function 3 of the CPU's northbridge > device, see the BIOS and Kernel's Developer's Guide for details).
Or even better, if on AMD, you can build the amd64_edac module (CONFIG_EDAC_AMD64) and do
echo <x> > /sys/devices/system/edac/mc/mc<y>/sdram_scrub_rate
where x is the scrubbing bandwidth in bytes/sec and y is the memory controller on the machine, i.e. node.
-- Regards/Gruss, Boris.
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