54 commits

Author	SHA1	Message	Date
rtm	b41b38d0da	give each cpu its own clock, so that preemption works on cpu 1	2006-07-11 18:45:27 +00:00
rtm	b548df152b	pre-empt both user and kernel, in clock interrupt ... usertest.c tests pre-emption kill()	2006-07-11 17:39:45 +00:00
rtm	8b4e2a08fe	swtch saves callee-saved registers ... swtch idles on per-CPU stack, not on calling process's stack fix pipe bugs usertest.c tests pipes, fork, exit, close	2006-07-01 21:26:01 +00:00
rtm	c41f1de5d4	file descriptors ... pipes	2006-06-27 14:35:53 +00:00