Improve File Cache, other small performance fixes#842
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jfantinhardesty merged 21 commits intomainfrom Feb 23, 2026
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jfantinhardesty
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brayan-trejo and
foodprocessor
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Describe your changes in brief
Added dirty file tracking in file cache to allow returning attributes when file is open and dirty and prevent stale data from being returned. Improved TruncateFile to handle missing file descriptors by reopening the cached file if needed, and to avoid marking the file dirty if the truncate is a no-op (these happen frequently in the VMS use case). Adjusted the LRU eviction logic to avoid deleting files that are still in use. Read now returns the correct FUSE error code on access denied (happens some what frequently with VMS). Improved Readdir to correctly handle end-of-directory conditions and prevent unnecessary warnings or errors. Fix issue with limit on download in file cache by changing GetUsage to just return bytes.
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