[systemd-devel] [PATCH 2/2] udev: Allow detection of udevadm settle timeout

[Nir Soffer]

On Sat, Apr 11, 2015 at 6:58 PM, David Herrmann <dh.herrmann at gmail.com> wrote:
>> A program running this tool can detect a timeout (expected) or an error
>> (unexpected), and can change the program flow based on this result.
>>
>> Without this, the only way to detect a timeout is to implement the timeout
>> in the program calling udevadm.
>
> I cannot really see a use-case here. I mean, yeah, the commit-message
> says it warns about timeouts but fails loudly on real errors. But
> again, what's the use-case? Why is a timeout not a real error? Why do
> you need to handle it differently?

Timeout means that the value I chose may be too small, or the machine
is overloaded. The administrator may need to configure the system
differently.

Other errors are not expected, and typically unexpected errors in an
underlying tool means getting the developer of the underlying tool
involved.

> Anyway, if it's only about diagnostics this patch seems fine to me.

Yes, it is mainly about diagnostics, and making it easier to debug and support.

Nir