Last time I had trouble submitting my files. What happened?

We have a limit on the size of the file you can submit. Currently this is set to 200 kilobytes, since this is much more than any compressed set of source files should be for a submission in this course. This means, however, that you should get rid of the binaries by running nmake clean before trying to submit, or even compression won't help you much.

Is minithread_switch thread safe?

The short answer is no. You should always call this function with interrupts disabled, but you should remember that it explicitly re-enables interrupts when it's nearly done.