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List:       ntp-hackers
Subject:    [ntp:hackers] Linux kernel bug in 3:12, low_latency on serial ports is broken
From:       Hal Murray <hmurray () megapathdsl ! net>
Date:       2014-02-20 8:31:00
Message-ID: 20140220083100.8BC9B406062 () ip-64-139-1-69 ! sjc ! megapath ! net
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Just a heads-up in case you hit this, or want to avoid it.

The symptom is BUG: scheduling while atomic
  https://bugzilla.redhat.com/show_bug.cgi?id=1065087

The discussion at
  https://lkml.org/lkml/2014/2/18/77
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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