Hi,
The timeout(9F) manpage says:
"The function called by timeout() must adhere to the same
restrictions as a driver soft interrupt handler.
The function called by timeout() is run in interrupt context
and must not sleep or call other functions that might sleep."
Does this mean that a function which is called using a timeout, cannot
use mutex_enter() ?
Suppose I have a function A which holds a certain lock, and A calls
function B through timeout. B also requires the lock to be held. What
is the best way to ensure proper operation?
If I put an ASSERT in B for MUTEX_HELD(...), it will likely fail if A
has finished execution by the time the timeout is called.
If I plainly call mutex_enter from B, would this be a recursive mutex
entry? Is it even allowed from a timeout'ed function?
Can timeout be called with a zero-timeout value? In that case I would
like to schedule the other function immediately, but without blocking
the caller.
Thanks, Thomas
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