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Use of rollback RCU with read-side modifications to RCU-protected data structures

  • US 20060130061A1
  • Filed: 12/09/2004
  • Published: 06/15/2006
  • Est. Priority Date: 12/09/2004
  • Status: Active Grant
First Claim
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1. A program storage device, comprising:

  • program instructions executable by a processing device to perform operations for performing a return/rollback process for read copy update (RCU) protected data structures, the operations comprising;

    determining a thread has been preempted and an exception signal has followed preemption allowing the process to resume;

    checking a user-level state of the thread before resuming the process; and

    restarting the RCU read-side critical section of the thread when user-level state indicates restart, else returning to a point of preemption, resuming execution and suspending checking of the user-level state when the user-level state indicates a rollback.

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