From owner-freebsd-stable@freebsd.org Sat Sep 30 03:01:05 2017 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id D88CCE07EA2 for ; Sat, 30 Sep 2017 03:01:05 +0000 (UTC) (envelope-from sepherosa@gmail.com) Received: from mail-qk0-x22b.google.com (mail-qk0-x22b.google.com [IPv6:2607:f8b0:400d:c09::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 82B2182EF4; Sat, 30 Sep 2017 03:01:05 +0000 (UTC) (envelope-from sepherosa@gmail.com) Received: by mail-qk0-x22b.google.com with SMTP id u67so1313404qkg.6; Fri, 29 Sep 2017 20:01:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc; bh=zUFRb3wVr6HPXyWsgQWqEMFr1sEertsCFmCw4hF+EKo=; b=oIhVimcpOMp0WGnGL1TtEh5ZvP9ekGVr4ti1EN38LUc3Ho6zRHydbqTg0loyTUKNV1 nXPoH4saNVNEw0Fg9q/ikwEQaZuW+Jx2PJBfijc8Q358ZHkfX6MuSyaP380w0psdwTvQ N40zGLkFMxAPm7H9IBUyhpQ0G2M/u7l8d9dPA6w500nZt9obThxYyu/FBkVesx/0x3+N S20FUN6T+hLjsSC9fBcNm3ZYWGK/yrpoPA9Mcb/2XPuZadrdI1TyCAhKsukFIILNIq7q vIgmQlgTO8iiqf5wIW9zGFOM27B1KuiuShB3Gg8jCHS5TpSzwkCqNwibKg4+SKyB6Lar mo6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc; bh=zUFRb3wVr6HPXyWsgQWqEMFr1sEertsCFmCw4hF+EKo=; b=m6YaMWOgkxXYkxoV7nGLZJEHgDIMzLiVg4xWgMQiz46Z5q816T/r3wWSLSd4bJbPD5 1IEiOyOHsljw11X2M4Ahz9bAMLFkF604s8r4cz7VZ117bloK6vyJ5jIh8yAyADZr76mY 3S1xVtlH4YsZ6vsH8dv5M8bBkB1VTbtIfL3atUacUNcjcQ7pLtalruT4uTAt5VwOupra xWPRYYuA+/aG+4GixAIRbYixjUg1cZps+xDw1NHX0IcUExD2xFE72Rw5Ai1y7cw3ARSh V9QzzcAaHbz6b2J2Sxa++VDphaEWUatybxFDkIR1WM8plGYMb1HhOuygMBo5J4JP8KRs 4uNQ== X-Gm-Message-State: AMCzsaVHWxDqzL1UcMzzbCALzhDVKLgrP1U17W1okBkvBO33g+PRDqos oGBxlRDIY9CTjC7+Z617vh6Nn2feRLJ5hiwJ3w== X-Google-Smtp-Source: AOwi7QDHqFGaO/Mm4t/fvXs/9P/Hk2cvf4z5HWxyTjneZuSZbeyp9nuxO8rekDXWKkR8thDxrdUc6LLEL8V6env5gjI= X-Received: by 10.55.198.152 with SMTP id s24mr6359301qkl.3.1506740461531; Fri, 29 Sep 2017 20:01:01 -0700 (PDT) MIME-Version: 1.0 Sender: sepherosa@gmail.com Received: by 10.140.42.137 with HTTP; Fri, 29 Sep 2017 20:01:00 -0700 (PDT) In-Reply-To: References: From: Sepherosa Ziehau Date: Sat, 30 Sep 2017 11:01:00 +0800 X-Google-Sender-Auth: kYmEXJEn284Mn8nHsXOH2QSaTJs Message-ID: Subject: Re: 11.1 running on HyperV hn interface hangs To: Pete French Cc: Paul Koch , freebsd-stable@freebsd.org, Hongjiang Zhang , Julian Elischer Content-Type: text/plain; charset="UTF-8" X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 Sep 2017 03:01:06 -0000 On Fri, Sep 29, 2017 at 8:23 PM, Pete French 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