It depends on the type of the load. If you have processes which fit into 800MB of RAM and you rarely do disk access, you surely don't need CONFIG_HIGHMEM. If your system is I/O bounded, you can safely waste few
CPU cycles in bookkeeping of another memory zone.
But the article is wrong in the sentence saying the PCI device cannot access highmem directly on a 1GB system.
It depends on the type of the
It depends on the type of the load. If you have processes which fit into 800MB of RAM and you rarely do disk access, you surely don't need CONFIG_HIGHMEM. If your system is I/O bounded, you can safely waste few
CPU cycles in bookkeeping of another memory zone.
But the article is wrong in the sentence saying the PCI device cannot access highmem directly on a 1GB system.
-Yenya