Re: [Qemu-devel] [PATCH 0/2] virtagent - fsfreeze support

[Vasiliy G Tolstov <v.tolstov@selfip.ru>]

On Tue, 2011-02-01 at 11:58 +0100, Jes.Sorensen@redhat.com wrote:
> From: Jes Sorensen <Jes.Sorensen@redhat.com>
> 
> Hi
> 
> This is a first attempt to add fsfreeze support to virtagent. The idea
> is for the guest agent to walk the list of locally mounted file
> systems in the guest, and issuing an ioctl to freeze them. The host
> can then do a live snapshot of the guest, obtaining stable file
> systems. After the snapshot, the host then calls the thaw function in
> virtagent, which goes through the list of previously frozen file
> systems and unfreezes them.
> 
> The list walking ignores remote file systems such as NFS and CIFS as
> well as all pseudo file systems.
> 
> The guest agent code is in the first patch, and host agent code is in
> the second patch. For now there is only human monitor support, but it
> should be pretty straight forward to add QMP support as well.
> 
> Patches are against the virtagent-dev git tree.
> 
> Comments and suggestions welcome!
> 
> Cheers,
> Jes

Hello. Very nice feature. Sorry for offropic, but can this feature can
be used to modify partiotion table on already mounted device (for
example root on ext3? )
Thank You.

-- 
Vasiliy G Tolstov <v.tolstov@selfip.ru>
Selfip.Ru