kv: remove lastToReplica and lastFromReplica from raftMu #95861
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tbg
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Jan 26, 2023
In 410ef29, we moved these fields from under the Replica.mu to under the Replica.raftMu. This was done to avoid lock contention. In this commit, we move these fields under their own mutex so that they can be accessed without holding the raftMu. This allows us to send Raft messages from other goroutines. The commit also switches from calling RawNode.ReportUnreachable directly in sendRaftMessage to using the more flexible unreachablesMu set, which defers the call to ReportUnreachable until the next Raft tick. As a result, the commit closes cockroachdb#84246. Release note: None Epic: None
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Extracted from #94165 without modification.
In 410ef29, we moved these fields from under the Replica.mu to under the Replica.raftMu. This was done to avoid lock contention.
In this commit, we move these fields under their own mutex so that they can be accessed without holding the raftMu. This allows us to send Raft messages from other goroutines.
The commit also switches from calling RawNode.ReportUnreachable directly in sendRaftMessage to using the more flexible unreachablesMu set, which defers the call to ReportUnreachable until the next Raft tick. As a result, the commit closes #84246.
Release note: None
Epic: None