[ntp:questions] Linux kernel bug in 3:12, low_latency on serial ports is broken

Hal Murray hmurray at megapathdsl.net
Thu Feb 20 08:31:00 UTC 2014

Just a heads-up in case you hit this, or want to avoid it.

The symptom is BUG: scheduling while atomic

The discussion at
confirms that it's the low-latency path that is buggy.

My setup works fine under low load, but hits the BUG when I do something like 
compile the ntp package.

3.11 works fine.  (for me)  There was major work in the serial area for 3.12

I'll send an update when/if it gets fixed.

These are my opinions.  I hate spam.

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