On Mon, Jun 04, 2007 at 05:59:59PM -0700, Yinghai Lu wrote: > On 6/4/07, Eric W. Biederman <[EMAIL PROTECTED]> wrote: > > > >Exactly, and given that this is a fairly easy thing to do, and that > >occasionally we see systems where this happens (even if their BIOS is > >later fixed). It is likely worth it for someone to write up the patch > >and that compare MTRRs with available memory, and to complain and > >reserve all memory that MTRRs claim is not write-back. > > > that is good. > Sometime BIOS can not even keep mtrr to the identical between > different CPU in SMP system.
The MTRR code already fixes this case. Or at least mostly -- it doesn't do it for fixed size MTRRs. > Or reset mtrr according to e820 table. That would be likely dangerous. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
