kernel: add background goroutine for periodic memory usage accounting#12538
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xiangbin-hu wants to merge 1 commit intogoogle:masterfrom
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kernel: add background goroutine for periodic memory usage accounting#12538xiangbin-hu wants to merge 1 commit intogoogle:masterfrom
xiangbin-hu wants to merge 1 commit intogoogle:masterfrom
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Add a background ticker goroutine that calls MemoryFile.UpdateUsage() every second, decoupling memory accounting from external polling via runsc events. Previously, memory usage counters only updated when something read cgroup memory stats, /proc/meminfo, or triggered a Full usage collection RPC—leaving post-restore allocations invisible for up to the polling interval. The ticker integrates with the kernel lifecycle: it starts in Kernel.Start(), stops in pauseTimeLocked() before save, and restarts in resumeTimeLocked() after save completes. UpdateUsage's internal throttling (CONFIG_HZ) prevents redundant mincore scans.
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Add a background ticker goroutine that calls MemoryFile.UpdateUsage() every second, decoupling memory accounting from external polling via runsc events. Previously, memory usage counters only updated when something read cgroup memory stats, /proc/meminfo, or triggered a Full usage collection RPC—leaving post-restore allocations invisible for up to the polling interval.
The ticker integrates with the kernel lifecycle: it starts in Kernel.Start(), stops in pauseTimeLocked() before save, and restarts in resumeTimeLocked() after save completes. UpdateUsage's internal throttling (CONFIG_HZ) prevents redundant mincore scans.