On Fri, 2015-06-26 at 17:47 -0700, Greg KH wrote:
> On Tue, Jun 16, 2015 at 04:22:12PM -0400, Joseph Salisbury wrote:
> > From: Nick Meier <[email protected]>
> >
> > BugLink: http://bugs.launchpad.net/bugs/1463584
> >
> > Hyper-V allows a guest to notify the Hyper-V host that a panic
> > condition occured. This notification can include up to five 64
> > bit values. These 64 bit values are written into crash MSRs.
> > Once the data has been written into the crash MSRs, the host is
> > then notified by writing into a Crash Control MSR. On the Hyper-V
> > host, the panic notification data is captured in the Windows Event
> > log as a 18590 event.
> >
> > Crash MSRs are defined in appendix H of the Hypervisor Top Level
> > Functional Specification. At the time of this patch, v4.0 is the
> > current functional spec. The URL for the v4.0 document is:
> >
> > http://download.microsoft.com/download/A/B/4/AB43A34E-BDD0-4FA6-BDEF-79EEF16E880B/Hypervisor
> > Top Level Functional Specification v4.0.docx
> >
> > Signed-off-by: Nick Meier <[email protected]>
> > Signed-off-by: K. Y. Srinivasan <[email protected]>
> > Signed-off-by: Greg Kroah-Hartman <[email protected]>
> > (Backported from commit 96c1d0581d00f7abe033350edb021a9d947d8d81)
> > Signed-off-by: Joseph Salisbury <[email protected]>
> > ---
> > drivers/hv/hyperv_vmbus.h | 11 +++++++++++
> > drivers/hv/vmbus_drv.c | 35 +++++++++++++++++++++++++++++++++++
> > 2 files changed, 46 insertions(+)
>
> This is a new feature, why should it be added to -stable releases?
>
> Sorry, not going to take it, upgrade to 4.1 if you want this feature.
>
> greg k-h
Greg is right: this isn't suitable for stable, so Luís and I will also
drop/revert these from the -ckt stable kernels (3.13, 3.16, and 3.19):
Drivers: hv: vmbus: Add support for VMBus panic notifier handler
Drivers: hv: vmbus: Correcting truncation error for constant
HV_CRASH_CTL_CRASH_NOTIFY
Sasha, it looks like you've already dropped them from 3.18 but heads-up
just in case.
Thanks Greg!
-Kamal
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