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Optimizing grace period detection for preemptible read-copy update on uniprocessor systems

  • US 7,953,708 B2
  • Filed: 07/28/2008
  • Issued: 05/31/2011
  • Est. Priority Date: 07/28/2008
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • determining if a data processing system that is to perform grace period detection following a data element update operation on shared data is a uniprocessor system or a multiprocessor system;

    performing grace period detection processing using a first grace period detection technique if said data processing system is a multiprocessor system;

    performing grace period detection processing using a second grace period detection technique if said data processing system is a uniprocessor system; and

    said grace period detection processing according to either technique determining an end of a grace period in which readers that are subject to preemption have passed through a quiescent state and cannot be maintaining references to a pre-update view of said shared data.

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