This may be a FAQ (but I did search).
Given this statement by RedHat:
"RAM Limitations on IA32
Red Hat Linux releases based on the 2.4 kernel -- including Red Hat Linux
7.1, 7.2, 7.3 and Red Hat Linux Advanced Server 2.1 -- support a maximum
of 16GB of RAM. Previous product announcements from Red Hat suggested that
Red Hat Linux 7.1 (and by extension, other releases based on the 2.4
kernel) supported up to 64GB of RAM. A more accurate statement is the
2.4-based kernels included in Red Hat Linux 7.1, 7.2, 7.3 and Red Hat
Linux Advanced Server 2.1 support the hardware extensions that support up
to 64GB of RAM. This is an important distinction: while the hardware will
indeed support up to 64GB of physical memory, the operating system design
limits the supported physical memory to approximately 16GB."
(http://www.redhat.com/services/techsupport/production/GSS_caveat.html)
What are the "operating system design limits" that restrict the amount of
supported memory to 16GB?
-- Cheers, Stephen Rothwell sfr@canb.auug.org.au http://www.canb.auug.org.au/~sfr/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/