Bug#782761: linux-tools: Please include tools/hv daemons in a binary

From	Christoph Martin <martin@uni-mainz.de>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#782761: linux-tools: Please include tools/hv daemons in a binary
Date	2015-08-17 19:00 +0200
Message-ID	<pYvVo-4JW-7@gated-at.bofh.it> (permalink)
References	(6 earlier) <pMvo6-S4-1@gated-at.bofh.it> <pMvHs-1uR-21@gated-at.bofh.it> <pNMmR-5QL-1@gated-at.bofh.it> <pYsNQ-jx-11@gated-at.bofh.it> <pYsXv-va-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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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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Bug#782761: linux-tools: Please include tools/hv daemons in a binary Hideki Yamane <henrich@debian.or.jp> - 2015-07-15 15:20 +0200
  Bug#782761: linux-tools: Please include tools/hv daemons in a binary Ben Hutchings <ben@decadent.org.uk> - 2015-07-15 15:30 +0200
    Bug#782761: linux-tools: Please include tools/hv daemons in a binary Hideki Yamane <henrich@debian.or.jp> - 2015-07-15 16:00 +0200
      Bug#782761: linux-tools: Please include tools/hv daemons in a binary Ben Hutchings <ben@decadent.org.uk> - 2015-07-15 16:20 +0200
        Bug#782761: linux-tools: Please include tools/hv daemons in a binary Hideki Yamane <henrich@debian.or.jp> - 2015-07-19 04:20 +0200
          Bug#782761: linux-tools: Please include tools/hv daemons in a binary Christoph Martin <martin@uni-mainz.de> - 2015-08-17 15:40 +0200
            Bug#782761: linux-tools: Please include tools/hv daemons in a binary Bastian Blank <waldi@debian.org> - 2015-08-17 15:50 +0200
              Bug#782761: linux-tools: Please include tools/hv daemons in a binary Ben Hutchings <ben@decadent.org.uk> - 2015-08-17 19:00 +0200
              Bug#782761: linux-tools: Please include tools/hv daemons in a binary Christoph Martin <martin@uni-mainz.de> - 2015-08-17 19:00 +0200
                Bug#782761: linux-tools: Please include tools/hv daemons in a binary Hideki Yamane <henrich@iijmio-mail.jp> - 2015-08-17 19:40 +0200

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