[LinuxBIOS] Opteron caching of device memory

Myles Watson myles at pel.cs.byu.edu
Wed Jun 13 18:48:51 CEST 2007

> On 6/13/07, Myles Watson <myles at pel.cs.byu.edu> wrote:
> > I'm using LinuxBIOS on my Tyan s2892.  I have a device that maps a lot
> > of the memory space, but I'm struggling trying to get the Opteron to
> > read and write to my device in larger blocks.  I have set the variable 
> > MTRRs in the device driver to writeback (witnessed by /proc/mtrr), but I

> > still get 64-bit accesses instead of 64-byte (cache line).
> wirte-back or write-combining?
> YH

I did write-back, because I would like it to be treated as much like DRAM as


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