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Chris Lu
6b379badbb
* filer: shut down test filers' meta-log buffers, fixing the 32-bit OOM Each log_buffer.NewLogBuffer preallocates five 8 MiB windows and spawns loopFlush/loopInterval goroutines that keep them reachable. The weed/filer tests built ~70 filers and aggregators that almost never called ShutdownLogBuffer, pinning ~2.8 GB plus live churn, and the linux/386 job ran out of its ~4 GiB address space inside newSealedBuffers. - MetaAggregator.Shutdown now retires MetaLogBuffer too: the "aggr" buffer's loops previously outlived the aggregator. - newTestFiler and newTestFilerWithStubStore register t.Cleanup shutdowns; the one-off filer/aggregator literals defer theirs. * filer: wait for the aggregated meta-log buffer to stop in Shutdown ShutdownLogBuffer only signals the stop; loopFlush and its pooled windows exit asynchronously. Match Filer.Shutdown's local-buffer sequence so the aggregator returns with the buffer's memory already released. * filer: cancel test filers' flush context before buffer shutdown The stub-store helpers build real NewFiler instances, so the queued shutdown flush retries appendToFile every ~737ms under flushCtx, which nothing ever cancelled — the buffer and its pool stayed alive past each test. Cancelling first lets the flush drop the window and WaitForShutdown confirms loopFlush exited. * filer: wait for test log buffers to drain after shutdown The stub-flush buffers cannot hang, but without WaitForShutdown their loopFlush goroutines release the pooled windows asynchronously — the memory this PR means to free is still counted as live while the next test allocates.