Messages in this thread | | | Date | Fri, 27 Oct 2006 01:06:39 +0200 (CEST) | From | Roman Zippel <> | Subject | Re: 2.6.19-rc2 and very unstable NTP |
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Hi,
On Thu, 26 Oct 2006, john stultz wrote:
> One of the recent changes was removing the in-kernel PPS code. This was > done because there were no in-kernel users of the interface (the only > ones being I believe in a variant of this LinuxPPS patch). While from > the diffstat below it doesn't look like the patch affects the > timekeeping code, it would be good to first reproduce the issue without > the patch.
The recent patch by Jim Houston explains the misbehaviour. It seems the ntp daemon uses ADJ_OFFSET_SINGLESHOT for time adjustments, which is rather coarse-grained. By adding proper PPS support one should be able to get a more stable clock, but it's better done by someone who has the hardware to test this.
bye, Roman - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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