Date: Sat, 30 Sep 2017 11:01:00 +0800 From: Sepherosa Ziehau <sephe@freebsd.org> To: Pete French <petefrench@ingresso.co.uk> Cc: Paul Koch <paul.koch@akips.com>, freebsd-stable@freebsd.org, Hongjiang Zhang <honzhan@microsoft.com>, Julian Elischer <julian@freebsd.org> Subject: Re: 11.1 running on HyperV hn interface hangs Message-ID: <CAMOc5cz7BUNPgAOFckD9=jwvOqdvvfr9nvcu1z4GuAydN1idWw@mail.gmail.com> In-Reply-To: <E1dxuJw-0008cc-QR@dilbert.ingresso.co.uk> References: <CAMOc5cwmQS=bLAe0fZYWpViMSRH5_ZbJumuezkbwRH=H_tgSFw@mail.gmail.com> <E1dxuJw-0008cc-QR@dilbert.ingresso.co.uk>
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On Fri, Sep 29, 2017 at 8:23 PM, Pete French <petefrench@ingresso.co.uk> wrote: >> Hmm, by ntpd I think you mean ntp client? You will have to disable >> timesync if you run ntp client: >> sysctl hw.hvtimesync.sample_thresh=-1 >> sysctl hw.hvtimesync.ignore_sync=1 >> >> They interfere w/ each other. > > Oh! Does this apply to machines in Azure Hyper-V as well as on standalone > installations ? I wasn't aware of this, and have ntp on as standard (which > I wil now turn off pending a reply to this email, as sods law says that now > I am aware of it then I will get lockups over the weekend) :-) It applies to both Azure and standalone Hyper-V. In addition to the sysctls I mentioned, you can also add tunable hint.hvtimesync.0.disabled=1 to /boot/loader.conf to disable timesync, if you want to use ntp. Thanks, sephe -- Tomorrow Will Never Die
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