I came across a few nifty articles on PCI, interrupt handlers, FB-DIMM and debugging this week:
PCI for developers: http://docs.sun.com/app/docs/doc/819-3196/6n5ed4gua?a=view#hwovr-22
Advanced interrupt handlers: http://developers.sun.com/solaris/articles/interrupt_handlers.html
When Linux runs out of memory:
http://www.linuxdevcenter.com/pub/a/linux/2006/11/30/linux-out-of-memory.html
Introducing FB-DIMMM memory:
http://www.pcstats.com/articleview.cfm?articleID=1812
Signals as a Linux debugging tool:
http://www-128.ibm.com/developerworks/power/library/l-sigdebug.html?ca=dgr-lnxw07SignalsLinuxDebug