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/proc/interrupts: observe ttyS0 interrupts go up in text mode

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Ciro Santilli
2018-05-12 18:27:05 +01:00
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README.adoc
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@@ -2761,6 +2761,8 @@ This confirms that:
The module also shows which handlers are registered for each IRQ, as we have observed at <<irq-ko>> The module also shows which handlers are registered for each IRQ, as we have observed at <<irq-ko>>
When in text mode, we can also observe interrupt line 4 with handler `ttyS0` increase continuously as IO goes through the UART.
=== Linux kernel tracing === Linux kernel tracing
Good overviews: Good overviews: