Messages in this thread | | | Date | Fri, 15 Mar 2002 17:40:36 -0700 | From | yodaiken@fsmlabs ... | Subject | Re: 2.4.18 Preempt Freezeups |
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On Fri, Mar 15, 2002 at 02:11:49PM -0500, Robert Love wrote: > If you "poke the processor", to be SMP-safe, you should hold a lock to > prevent multiple concurrent "pokings of the processor" - thus you become > preempt-safe.
Without preempt: x = movefrom processor register; do_something with x
is safe in SMP With SMP it requires a lock.
-- --------------------------------------------------------- Victor Yodaiken Finite State Machine Labs: The RTLinux Company. www.fsmlabs.com www.rtlinux.com
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