Date: Thu, 15 Apr 2010 23:43:49 +0300 From: Andriy Gapon <avg@freebsd.org> To: freebsd-hackers@freebsd.org Subject: Re: periodically save current time to time-of-day hardware Message-ID: <4BC77A85.6070603@freebsd.org> In-Reply-To: <4BBB2D69.80002@freebsd.org> References: <4BACC791.70502@icyb.net.ua> <20100327214634.GI32799@server.vk2pj.dyndns.org> <86fx3k7jqi.fsf@ds4.des.no> <201003291044.28544.jhb@freebsd.org> <4BB22A42.7050003@icyb.net.ua> <4BBB2D69.80002@freebsd.org>
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on 06/04/2010 15:47 Andriy Gapon said the following: > on 30/03/2010 19:43 Andriy Gapon said the following: >> do you think that periodic saving of system clock to hardware and making resettodr >> asynchronous are dependent issues? Or are they orthogonal and can be implemented >> independently? > > A new version of the patch: > http://people.freebsd.org/~avg/periodic_resettodr.diff Given total lack of reviews and comments I am keeping this patch for my local use. > Some notes: > - this patch doesn't implement any resettodr enhancements proposed earlier: making > it non-blocking/asynchronous and saving time closer to seconds boundary; > - the patch adds code for saving time on shutdown, adds logic for checking ntp > synchronization status and for dynamically stoping/(re-)starting the callout via > period sysctl; > - the patch consists of two pieces: the first is abstracting ntp status check into > a separate function and the other is all the time saving code; > - I don't feel that kern_ntptime.c is best place for this code, I only chose it > because of ntp status checking; perhaps ntp_is_time_error needs to be made public > and the code moved to a better file; suggestion are welcome! > > I also welcome any comments and suggestions on code style, identifier naming, > logic, strategy, etc. > Thank you! > > P.S. it seems that machdep is not the best place for "RTC" sysctls, but I am > deferring this issue at the moment. > -- Andriy Gapon
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