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This commit adds a description of how expedited grace periods operate during the mid-boot "dead zone", which starts when the scheduler spawns the first kthread and ends when all of RCU's kthreads have been spawned. In short, before mid-boot, synchronous grace periods can be a no-op. After the end of mid-boot, workqueues may be used. During mid-boot, the requesting task drivees the expedited grace period. For more detail, see https://lwn.net/Articles/716148/. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> |
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| Data-Structures | ||
| Expedited-Grace-Periods | ||
| Requirements | ||