Bug#782761: linux-tools: Please include tools/hv daemons in a binary
Hi Bastian,
Am 17.08.2015 um 15:45 schrieb Bastian Blank:
> Hi Christoph
>
> On Mon, Aug 17, 2015 at 03:23:32PM +0200, Christoph Martin wrote:
>> do you see a way to get the tools/hv daemons into the 3.16 kernel for
>> jessie in a point release?
>
> It will show up in backports.
In backports with 4.1 kernel? Would this package depend on the 4.1
kernel or would it be installable with a 3.16 kernel?
I could test if the 4.1 binary would run correctly with a 3.16 kernel.
>
>> There are a lot of jessie machines running inside HyperV which will need
>> it as soon as the new backup method of HyperV servers is used.
>
> Can you explain that a bit more?
Windows HyperV 2012 R2 has a feature called "Live virtual machine
backup". To support this from Linux machines you need to run the
vss_daemon. HyperV will send a message to this daemon to shortly freeze
the filesystems to make HyperV able to make a consistent snapshot for a
backup. The deamon will pass this request to the kernel. This
functionality is in 3.16 kernel.
Here are the M$ docs for Debian and Ubuntu:
https://technet.microsoft.com/en-US/library/dn614985.aspx
https://technet.microsoft.com/en-us/library/dn531029.aspx
If you don't run the daemon you might get an I/O error from the virtual
hardware witch results in a readonly fs and possible fs corruption. We
encounted this several times in the last year and it took us a long time
to find the cause.
Since this is in HyperV since 2012 I consider it really important to get
into jessie main or at least officially working for kernel 3.16.
Yours
Christoph
PS: Am am at debconf, if you are there too and want to talk.
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