Translations:MIPS/Hardware Requirements/22/en


 * Notes:
 * Octane support is back as of sys-kernel/mips-sources-3.18.3.
 * SMP support works again as of sys-kernel/mips-sources-4.1.0.
 * Memory is limited to a maximum of 2GB. PCI-USB devices might not work with >1.7GB of RAM, but most external PCI will not work at all beyond 2GB.  This is due to incorrect DMA configuration at the moment.
 * The serial ports on the Octane default to 9600 8N1 in the ARCS PROM. Booted into Linux, the kernel is using a rudimentary driver that relies on constant polling of the serial port to send or receive data at a maximum rate of 38400 8N1.  To fully support DMA and interrupt-signaled serial ports, the in-kernel SGI Altix driver needs work, as it can currently detect the serial ports, but not send/receive data.
 * CONFIG_TRANSPARENT_HUGEPAGE does not work reliably on this platform. Random SIGSEGV or SIGBUS events will happen.  Do not use it unless you are trying to debug the problem.  Possibly an issue with the current MIPS TLB code.
 * CONFIG_SLUB is broken on IP30. It will lock up during boot due to an infinite number of messages consuming all available CPU time regarding duplicate entries in /sys/kernel/slab/*.