Date: Fri, 29 Sep 2017 13:31:22 +0800 From: Sepherosa Ziehau <sephe@freebsd.org> To: Paul Koch <paul.koch@akips.com> Cc: Julian Elischer <julian@freebsd.org>, freebsd-stable@freebsd.org, Hongjiang Zhang <honzhan@microsoft.com> Subject: Re: 11.1 running on HyperV hn interface hangs Message-ID: <CAMOc5cwmQS=bLAe0fZYWpViMSRH5_ZbJumuezkbwRH=H_tgSFw@mail.gmail.com> In-Reply-To: <20170929143659.7fe1a4f6@akips.com> References: <20170906193309.796c79ed@akips.com> <3f96c7d0-4fbd-26cb-5c84-8868d12eb427@ingresso.co.uk> <14997bba-aac2-947b-9b78-04af41ea29b0@freebsd.org> <CAMOc5cxQp1P3WnDf=Hgo8X0LmQfjCTowO=ya8VsWhu4cdTeajQ@mail.gmail.com> <20170907150711.025e4e41@akips.com> <CAMOc5cx-dES8ABM8oNNKfT50ZUebVtpkKJn9Vtc_nQrRQ2vHgQ@mail.gmail.com> <20170908010400.0fb81bc4@akips.com> <CAMOc5cwG=NGeyVt2DwTujKMwsTzfM-6NvSXmQR8rzetVHMYUiw@mail.gmail.com> <20170929143659.7fe1a4f6@akips.com>
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On Fri, Sep 29, 2017 at 12:36 PM, Paul Koch <paul.koch@akips.com> wrote: > On Thu, 14 Sep 2017 09:54:56 +0800 > Sepherosa Ziehau <sephe@freebsd.org> wrote: > >> If you have any updates on this, please let me know. There is still >> time for 10.4. > > We are still playing around with this in the lab... > > Running similar setup as the customer > Microsoft Windows Server 2012 R2 Datacentre (6.3.9600) Revision 16384 > Hyper-V 2012 > > Two VM guests > - 11.0-RELEASE > - 11.1-p1 > > We can not get the Hyper-V hn interface to lock up like the customer can > though. > > We can get the VMs to hang/stall regularly if the guests run ntpd - approx > every 15 mins, but no real obvious pattern to it. Disabling ntpd fixes it. 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. Or do you mean the network hanging triggered by "RXBUF ack failed"? Thanks, sephe -- Tomorrow Will Never Die
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