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From: Andriy Gapon <avg@FreeBSD.org>
Date: Thu, 29 Apr 2010 09:02:46 +0000 (UTC)
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Subject: cvs commit: src/sys/kern kern_ntptime.c
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avg         2010-04-29 09:02:46 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             kern_ntptime.c 
  Log:
  SVN rev 207360 on 2010-04-29 09:02:46Z by avg
  
  periodically save system time to hardware time-of-day clock
  
  This is done in kern_ntptime, perhaps not the best place.
  This is done using resettodr().
  Some features:
  - make save period configurable via tunable and sysctl
  - period of zero disables saving, setting a non-zero period re-enables
    it or reschedules it
  - do saving only if system clock is ntp-synchronized
  - save on shutdown
  
  Discussed with: des, Peter Jeremy <peterjeremy@acm.org>
  X-Maybe:                save time near seconds boundary for better precision
  MFC after:              2 weeks
  
  Revision  Changes    Path
  1.67      +65 -0     src/sys/kern/kern_ntptime.c