> Mike, can you share me your kernel version and which Linux distro do you use?
2.6.32-504.el6.x86_64 AKA RHEL 6.6
Happened on centos 7 and 6.5 too.
#cat /var/lib/ntp/drift
-248.869
About 20 secs a day (constant)
Its not a new problem I had this in other distros and other kernels.
I would say its
on.org;
> LKML; de...@linuxdriverproject.org; o...@aepfle.de; a...@canonical.com;
> jasow...@redhat.com; KY Srinivasan; John Stultz; Richard Cochran
> Subject: Re: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for
> do_adjtimex()
>
> On Wed, 22 Oct 2014, Mike Surcouf wrote:
&g
On Wed, 22 Oct 2014, Mike Surcouf wrote:
> I get that NTP can be installed locally. This is how I regulate time
> on my guests. I agree the admin argument probably doesn't stand up.
>
> The problem is hyperv_clocksource (pluggable time source used by
> hyperv guests) is systematically fast in m
I get that NTP can be installed locally. This is how I regulate time
on my guests. I agree the admin argument probably doesn't stand up.
The problem is hyperv_clocksource (pluggable time source used by
hyperv guests) is systematically fast in my environment. by around
-250 PPM.
I get away with N
on.org; LKML;
> de...@linuxdriverproject.org; o...@aepfle.de; a...@canonical.com;
> jasow...@redhat.com; KY Srinivasan; John Stultz; Richard Cochran
> Subject: Re: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for
> do_adjtimex()
>
> On Mon, Oct 20, 2014 at 11:02:13PM -0500, Jeff Epler wr
sow...@redhat.com; KY Srinivasan; John Stultz; Richard Cochran
> Subject: Re: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for
> do_adjtimex()
>
> On Tue, Oct 21, 2014 at 03:18:58AM +, Thomas Shao wrote:
> >
> > In some situation, the user is not able to enable g
gt; o...@aepfle.de; a...@canonical.com; jasow...@redhat.com; KY Srinivasan;
> John Stultz; Richard Cochran
> Subject: RE: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for
> do_adjtimex()
>
> On Tue, 21 Oct 2014, Thomas Shao wrote:
> > > I still do not have a consistent
On Tue, 21 Oct 2014, Thomas Shao wrote:
> I'm also thinking if NTPd could expose some interface to allow other
> application to directly provide time source for it to consume. In my
> opinion, emulating the ntp source should be very hard and error
> prone.
Well, if done right it would be pretty p
On Tue, 21 Oct 2014, Thomas Shao wrote:
> I didn't find a way to detect whether NTPd is running in the hyper-v module.
And you better do not try at all.
> In http://doc.ntp.org/4.1.0/ntpd.htm, it mentioned: Normally, the
> time is slewed if the offset is less than the step threshold, which
> i
On Mon, Oct 20, 2014 at 11:02:13PM -0500, Jeff Epler wrote:
> 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 pr
On Tue, 21 Oct 2014, Thomas Shao wrote:
> > I still do not have a consistent argument from you WHY you need to abuse
> > do_adjtimex() to do that host - guest synchronization in the first place.
> >
>
> I need a function to gradually slew guest time. do_adjtimex() provides all
> the
> functiona
On Tue, Oct 21, 2014 at 03:18:58AM +, 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.
But the guest *is* networked, right?
(Otherwise syncing the
sow...@redhat.com; KY Srinivasan; John Stultz; Richard Cochran
> Subject: Re: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for
> do_adjtimex()
>
> On Tue, Oct 21, 2014 at 03:18:58AM +, Thomas Shao wrote:
> > In some situation, the user is not able to enable guest VM to sync
On Tue, Oct 21, 2014 at 03:18:58AM +, 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
sow...@redhat.com; KY Srinivasan; Richard Cochran
> Subject: Re: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for
> do_adjtimex()
>
> On Mon, Oct 20, 2014 at 8:18 PM, Thomas Shao
> wrote:
> >
> >> -Original Message-
> >> From: linux-kernel-ow...@vger
t;> To: Thomas Shao
>> Cc: gre...@linuxfoundation.org; LKML; de...@linuxdriverproject.org;
>> o...@aepfle.de; a...@canonical.com; jasow...@redhat.com; KY Srinivasan;
>> John Stultz; Richard Cochran
>> Subject: Re: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for
>> do_adjtimex()
&
gt; o...@aepfle.de; a...@canonical.com; jasow...@redhat.com; KY Srinivasan;
> John Stultz; Richard Cochran
> Subject: Re: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for
> do_adjtimex()
>
> On Mon, 20 Oct 2014, Thomas Gleixner wrote:
>
> > On Wed, 15 Oct 2014, Thoma
Srinivasan;
> John Stultz
> Subject: Re: [PATCH v2 1/2] timekeeping: add EXPORT_SYMBOL_GPL for
> do_adjtimex()
>
> On Wed, 15 Oct 2014, Thomas Shao wrote:
>
> And again you forgot to cc John Stultz on this
I'll cc John Stultz in the future. Sorry for that.
>
&
On Mon, 20 Oct 2014, Thomas Gleixner wrote:
> On Wed, 15 Oct 2014, Thomas Shao wrote:
>
> And again you forgot to cc John Stultz on this
>
> > Export do_adjtimex function for hyper-v Time Synchronization component
Aside of that, we really want to see the use case for this and how you
addres
On Wed, 15 Oct 2014, Thomas Shao wrote:
And again you forgot to cc John Stultz on this
> Export do_adjtimex function for hyper-v Time Synchronization component
>
> Signed-off-by: Thomas Shao
> ---
> kernel/time/timekeeping.c |1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
>
Export do_adjtimex function for hyper-v Time Synchronization component
Signed-off-by: Thomas Shao
---
kernel/time/timekeeping.c |1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index ec1791f..205a4b3 100644
--- a/kerne
21 matches
Mail list logo
