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Fair high-throughput locking for expedited grace periods
Fair high-throughput locking for expedited grace periods
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机译：公平的高通量锁定，可加快宽限期
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摘要
An updater needing an expedited RCU grace period may initiate a leaf-to-root traversal of a funnel lock embodied as a hierarchical tree of nodes. For each accessed node, the updater may check an indicator to determine if another updater needing the same expedited grace period has visited the node. If true, the updater may add itself to a waitqueue of updaters waiting for the expedited RCU grace period. If false, the updater may set the indicator to indicate it has visited the node, and then continue to a next node. If the updater reaches the root node with no indication that any other updater needing the expedited RCU grace period has visited the nodes accessed by the updater, the updater may, while holding a mutex lock, start a new expedited RCU grace period and at the end thereof wake up other updaters waiting on the expedited RCU grace period.
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