ACK: [SRU][Wily][PATCH 0/1] Drivers: hv: vss: run only on supported host versions

[Brad Figg]

On Wed, Mar 09, 2016 at 01:31:38PM -0500, Joseph Salisbury wrote:
> BugLink: http://bugs.launchpad.net/bugs/1496927
> 
> == SRU Justification ==
> Running a Wily guest on a Windows Server 2012 without the R2 updates, 
> the system-udevd process consumes 100% cpu.  Also, there are thousands of messages
> written to syslog complaining that systemd-udevd cannot find the following file:
> /dev/vmbus/hv_vss
> 
> The vss daemon for Hyper-V only supports host versions 5.0 and greater. As a 
> result, it won't actually *do* anything on Windows Server 2012 without the R2 updates.
> Because of this, the systemd-udevd process is spinning trying to start the daemon.
> 
> Commit ed9ba608e fixes this issue by first checking the Windows version and skipping 
> hv_vss_init on WS2012 and older.
> 
> Commit ed9ba608e4 is in mainline as of v4.5-rc1.  This bug does not affect Trusty and 
> the commit has already been applied to Xenial, so it is only needed in Wily.
> 
> == Fix ==
> commit ed9ba608e4851144af8c7061cbb19f751c73e998
> Author: Olaf Hering <olaf at aepfle.de>
> Date:   Mon Dec 14 16:01:42 2015 -0800
> 
>     Drivers: hv: vss: run only on supported host versions
> 
> 
> 
> == Test Case ==
> A test kernel was built with this patch and tested by the original bug reporter.
> The bug reporter states the test kernel resolved the bug.  I was also able to 
> reproduce this bug, and confirm the patch fixes the issue.
> 
> 
> 
> 
> Olaf Hering (1):
>   Drivers: hv: vss: run only on supported host versions
> 
>  drivers/hv/hv_snapshot.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> -- 
> 1.9.1
> 
> 
> -- 
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> kernel-team at lists.ubuntu.com
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Good cherry pick

-- 
Brad Figg brad.figg at canonical.com http://www.canonical.com