H. Peter Anvin <hpa <at> zytor.com> writes: > > Supposedly WinXP-32 doesn't use memory over 4 GB even if it is available > (a market-segmentation decision of the part of Microsoft, to force > people to buy WinServer 2003; WinXP SP2 does PAE so there is no > technical reason.) This probably has disincentivized hardware vendors > from providing support for remapping the memory from the aperture above > the 4 GB mark. The logic isn't all that trivial, especially if the > aperture size is configurable, so I can understand why they would punt. >
The reason according to Microsoft is that enabling PAE induced driver incompatibilities - to me it sounds quite plausible given the quality of drivers for consumer versions of XP/Vista and the fact that 4GB RAM in consumer class machine is a newer thing. There is a KB document detailing the reasons for disabling >4Gb RAM in XP SP2 and later 32-bit OSes - http://support.microsoft.com/kb/888137 . Parag -- 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/
