From: Jeff Epler <jepler@unpythonic.net>
To: Thomas Shao <huishao@microsoft.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
LKML <linux-kernel@vger.kernel.org>,
"devel@linuxdriverproject.org" <devel@linuxdriverproject.org>,
"olaf@aepfle.de" <olaf@aepfle.de>,
"apw@canonical.com" <apw@canonical.com>,
"jasowang@redhat.com" <jasowang@redhat.com>,
KY Srinivasan <kys@microsoft.com>,
John Stultz <john.stultz@linaro.org>,
Richard Cochran <rcochran@linutronix.de>
Subject: Re: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for do_adjtimex()
Date: Mon, 20 Oct 2014 23:02:13 -0500 [thread overview]
Message-ID: <20141021040212.GA6278@unpythonic.net> (raw)
In-Reply-To: <CD2CABCB2C0A0D4682C5F8AD840141540D27B9@HKXPRD3002MB006.064d.mgd.msft.net>
On Tue, Oct 21, 2014 at 03:18:58AM +0000, Thomas Shao wrote:
> In some situation, the user is not able to enable guest VM to sync with external
> time source, like NTP. But the host is still synced with a trusted time source.
> In this case, host-guest time synchronization is useful.
It's interesting to imagine that a virtualization host could present a
time service to the guest *userspace*, even when the guest is not
otherwise exposed to the internet at large. This could take the form of
an NTP server on a private network, or as an implementation of a time
source directly usable by ntpd in the guest, for instance as an emulated
serial port with synthetic NEMA GPS signal + PPS signal, for instance.
next prev parent reply other threads:[~2014-10-21 4:02 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-15 8:39 [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for do_adjtimex() Thomas Shao
2014-10-20 18:28 ` Thomas Gleixner
2014-10-20 18:40 ` Thomas Gleixner
2014-10-21 3:18 ` Thomas Shao
2014-10-21 3:24 ` John Stultz
2014-10-21 4:08 ` Thomas Shao
2014-10-21 8:23 ` Thomas Gleixner
2014-10-21 4:02 ` Jeff Epler [this message]
2014-10-21 4:55 ` Thomas Shao
2014-10-21 8:25 ` Thomas Gleixner
2014-10-21 8:20 ` Richard Cochran
2014-10-21 10:11 ` Thomas Shao
2014-10-22 11:01 ` Mike Surcouf
2014-10-22 12:42 ` Thomas Gleixner
2014-10-22 13:51 ` Thomas Shao
2014-10-22 14:20 ` Mike Surcouf
2014-10-21 8:13 ` Richard Cochran
2014-10-21 9:16 ` Thomas Shao
2014-10-21 8:19 ` Thomas Gleixner
2014-10-21 9:02 ` Thomas Shao
2014-10-21 2:37 ` Thomas Shao
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