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Hi,

does the LOCK instruction has any meaning in a single-processor system ? Or is only used in SMP-systems ?

What happens if a taskswitch occurs right after a LOCK instruction ?

Thnx,

Jeroen

sith wrote:does the LOCK instruction has any meaning in a single-processor system ? Or is only used in SMP-systems ?

It's not necessary on a single-processor system.

What happens if a taskswitch occurs right after a LOCK instruction ?

Nothing unusual... why? LOCK is an instruction prefix, not an instruction in its own right, so it won't get separated from the instruction itself.