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SubjectRE: [PATCH 1/1] X86: Mark the Hyper-V clocksource as being continuous
Date


> -----Original Message-----
> From: Jeff Leung [mailto:jleung@v10networks.ca]
> Sent: Tuesday, December 2, 2014 3:58 PM
> To: KY Srinivasan; x86@kernel.org; gregkh@linuxfoundation.org; linux-
> kernel@vger.kernel.org; devel@linuxdriverproject.org; olaf@aepfle.de;
> apw@canonical.com; jasowang@redhat.com; tglx@linutronix.de;
> hpa@zytor.com
> Cc: stable@vger.kernel.org
> Subject: RE: [PATCH 1/1] X86: Mark the Hyper-V clocksource as being
> continuous
>
> Does this mean that host-to guest timesync now works properly with Linux
> guests?
>
> -- Jeff

Jeff,

We have had the Hyper-V clocksource for sometime now and this patch just marks this clocksource
as being continuous. Nothing has changed with regards to timesynch.

Regards,

K. Y

>
> > -----Original Message-----
> > From: linux-kernel-owner@vger.kernel.org
> [mailto:linux-kernel-owner@vger.kernel.org]
> > On Behalf Of K. Y. Srinivasan
> > Sent: Tuesday, December 2, 2014 17:04
> > To: x86@kernel.org; gregkh@linuxfoundation.org;
> linux-kernel@vger.kernel.org;
> > devel@linuxdriverproject.org; olaf@aepfle.de; apw@canonical.com;
> > jasowang@redhat.com; tglx@linutronix.de; hpa@zytor.com
> > Cc: K. Y. Srinivasan; stable@vger.kernel.org
> > Subject: [PATCH 1/1] X86: Mark the Hyper-V clocksource as being
> continuous
> >
> > The clocksource based on Hyper-V per-partition reference count MSR is
> continuous. Mark
> > it accordingly.
> >
> > Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
> > cc: stable@vger.kernel.org
> > ---
> > arch/x86/kernel/cpu/mshyperv.c | 1 +
> > 1 files changed, 1 insertions(+), 0 deletions(-)
> >
> > diff --git a/arch/x86/kernel/cpu/mshyperv.c
> b/arch/x86/kernel/cpu/mshyperv.c index
> > a450373..939155f 100644
> > --- a/arch/x86/kernel/cpu/mshyperv.c
> > +++ b/arch/x86/kernel/cpu/mshyperv.c
> > @@ -107,6 +107,7 @@ static struct clocksource hyperv_cs = {
> > .rating = 400, /* use this when running on Hyperv*/
> > .read = read_hv_clock,
> > .mask = CLOCKSOURCE_MASK(64),
> > + .flags = CLOCK_SOURCE_IS_CONTINUOUS,
> > };
> >
> > static void __init ms_hyperv_init_platform(void)
> > --
> > 1.7.4.1
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe
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> > Please read the FAQ at http://www.tux.org/lkml/



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