Re: [PATCH 1/1] serial_core: Update buffer overrun statistics.

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On Tue, 15 May 2012 11:20:19 -0500
Corbin <corbinat@xxxxxxxxx> wrote:

> I agree that losing bytes in the software layer wouldn't happen under
> normal circumstances, but it is still important to know when it
> happens. My understanding was that the overrun field in the port's
> icount was for logging hardware overruns, while the buf_overrun field
> should be used for software overruns. If this is not the case then is
> there another method for determining when the software layer is losing
> bytes?

It'll occur when the machine cannot even allocate a free page of memory.
So you'll get GFP spews in the kernel log to go with it.

Alan
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