Imprecise Interrupts.

[sajay@temenos.com]

Hi,

In architectures such as Intel x86 architecture Instruction Execution is inorder, ie only when the previous Instruction has completely finish , the next instruction can finish. But  in architectures such as SPARC, an instruction can finish execution before another Instruction that was started prior to this Instruction finishes. Supposing an Interrupt occurs in such a scenario, how does the kernel know which instruction to restart. Or is the system rolled back to a state before these two instructions were started and the System is started from there. 

Thanks in Advance,
Sajay