On 6/12/13 11:01 AM, Luigi Rizzo wrote:
hi,
is it possible to run copyin() or copyout() in one of these cases:
1. while holding a spinlock
2. while holding a regular mutex/lock
3. while holding a read lock (on an RWLOCK or RMLOCK)
4. while holding a write lock (on an RWLOCK or RMLOCK)
I suspect #1 is forbidden, but am a bit unclear for the
other cases.
No on all of the above unless the memory is wired.
You need a sx or semaphore.
-Alfred
thanks
luigi
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--
Alfred Perlstein
VP Software Engineering, iXsystems
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