I have a function chan_send in which :
chan_send (...) {
qlock()
rwakeup(...)
qunlock()
}

If two such chan_send functions are called without a "task-switch" 9vx crashes. A work around for this problem is to place a sleep(0) after qunlock to enforce a task-switch

chan_send(...) {
qlock()
rwakeup(...)
qunlock()
sleep(0)
}

This behaviour isn't documented anywhere. I'll test it next on bare metal with a real kernel to find out if this is only a 9vx problem.



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