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If I've understood this correctly, the Round-Robin scheduler maintains a list of processes, where each process has one entry. But what happens if the same process appears twice?

Does it crash or reports an error, or just gives it more CPU time?

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I would guess that, since the scheduler itself maintains the list, such a condition would only be caused by a bug. How the bug is dealt with very much depends on the particular operating system type and even version. Linux? Linux 2.4? Linux 2.6? Linux 2.6.33.2? Windows? Windows NT 6.1 SP2? Plan9, yesterday's build? –  grawity Sep 26 '11 at 7:10
    
No specific OS or platform. General question. –  Jan Helge Sep 26 '11 at 12:07
    
"It could be both, or neither, or it could make your computer explode while curing cancer in the background." General answer. –  grawity Sep 26 '11 at 12:14
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closed as not a real question by sblair, grawity, slhck, Mokubai, Sathya Sep 27 '11 at 2:51

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