For controllers with only one port (like PCIe or M.2 SSDs) interrupt can come from only one source, and skipping read saves few percents of CPU time. MFC after: 1 month H/W donated by: I/O Switch
For controllers with only one port (like PCIe or M.2 SSDs) interrupt can come from only one source, and skipping read saves few percents of CPU time. MFC after: 1 month H/W donated by: I/O Switch