On Mon, Oct 28, 2013 at 12:45:41PM +0100, Borislav Petkov wrote: > Drop Dave's stale mail address. > > On Mon, Oct 28, 2013 at 12:25:05PM +0100, Andreas Werner wrote: > > > but you end up doing > > > > > > PAT=Write-Back + MTRR=Write-Through = Effective Memory of Write-Back > > > > > No the effective memory type is WT, check out the Intel document with the > > table of Effective memory type combinations. > > You need to read what I'm saying more carefully. Sorry then i missunderstood something? > > > Yes but, there is no way in the kernel to mark a memory WT, > > That doesn't mean you can return _PAGE_CACHE_WB for MTRR_TYPE_WRTHROUGH. > The correct thing to do, IMHO, would be to set the PWT bit in the PTEs > of those pages comprising your buffer. > But why? the combination of PAT=WB and MTRR=WT is allowed isn´t it? What should i return instead of?
regards Andy > -- > Regards/Gruss, > Boris. > > Sent from a fat crate under my desk. Formatting is fine. > -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
