Am 21.01.14 20:54, schrieb David Laight: > On Tue, Jan 21, 2014 at 10:31:08AM +0000, Emmanuel Dreyfus wrote: >> On Mon, Jan 20, 2014 at 04:18:38PM +0000, Emmanuel Dreyfus wrote: >>> Changing memory fixed the problem. The machine now boots 6.0 i386 PAE >>> with SMP enabled and 128 GB of RAM installed, and it seems to be stable. >> >> But I spoke too fast. It is stable, but the i386 PAE kernel does not >> sees more than 2 GB of memory. An amd64 kernel sees the whole 128 GB. >> >> Is it possible that the chipset cannot run PAE? > > I doubt it. > > 2G sounds like the amount of memory below 4G - but I'd have thought that > would be 3G (or even 3.5G).
That depends on the PCI MMIO memory layout. And I am wondering if 64bit PCI devices are accessable at all when their PCI bar is above 4G. Christoph