s7r wrote: > teor wrote: >> Hi, >> >>> [SNIP] I have received the email below from Ron off-list, and it was very useful. Posting it here. Ron, I have tried to email back but apparently your mail server treats me as spam and I get bounce back with permanent failure - hopefully you are still getting fro lists.torproject.org and you can read this: ronqtorrelays@xxxxxxxxxx wrote: > Hi! > > The torproject mailman server appears to have fallen over. Here's what I've been trying to send to the list. Hope it helps. > > -*"*-.,,.-*"*-.,,.-*"*-.,,.-*"*-.,,.-*"*-.,,.-*"*-.,,.-*"*- > >> On Sep 7, 2019, at 04:13, s7r <s7r@xxxxxxxxxx> wrote: >> >> after upgrading from 0.4.1.2 to 0.4.2.0, I did an entire system >> reboot because I also updated some other stuff. So the entire OS >> restarted, not just Tor daemon > > It seems likely that your machine's hardware clock is off. During a reboot, the system will come up using the hardware clock, then (if configured to do so) eventually correct the time using NTP. > > You can check the hardware clock by running 'hwclock' as root. If it's off, you can set it to your (presumed accurate) system time by executing 'hwclock --systohc'. > > --Ron > Hey Ron, Wow! Nice catch. You are right. Here is what the OS where Tor is running is showing: $ sudo hwclock 2019-08-28 22:42:11.880025-0400 $ date --utc Sat Sep 7 23:35:43 UTC 2019 So `date` is accurate while `hwclock` is obviously not. The problem is I really don't know why. The server above (which reports skewed clock on hwclock) is a virtual machine. The host (on which this virtual machine is running) also uses NTP and reports accurate clock on both `date` and `hwclock`. There is no skew at all anywhere on the host. So I am wondering where is it getting the inaccurate hwclock from. Most probably a bug in the virtualization software used I guess. All other virtual machines (guests) on the same host report accurate time on both `hwclock` and `date`. Anyway, certainly the bug is not related to Tor. Thanks for this.
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