zfs: use atomic.Value for lock-free cache reads#3763
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dims merged 1 commit intogoogle:masterfrom Dec 4, 2025
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The ZfsWatcher cache is read frequently by container housekeeping goroutines while being updated every 15 seconds by Refresh(). Using atomic.Value allows lock-free reads, eliminating contention between readers and the single writer. Add usageCache typed wrapper to eliminate boilerplate type assertions. Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>
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The ZfsWatcher cache is read frequently by container housekeeping goroutines while being updated every 15 seconds by Refresh(). Using atomic.Value allows lock-free reads, eliminating contention between readers and the single writer.