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).
Any suggestions? Thanks, Myles
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