From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?windows-1252?Q?Roger_Pau_Monn=E9?= <roger.pau@citrix.com>
Subject: Re: [PATCH v8 00/15] Migration v2 (libxc)
Date: Wed, 8 Apr 2015 17:44:28 +0200
Message-ID: <55254CDC.9070504@citrix.com>
References: <1427999563-22132-1-git-send-email-andrew.cooper3@citrix.com>
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To: Andrew Cooper <andrew.cooper3@citrix.com>, Xen-devel <xen-devel@lists.xen.org>
Cc: Wei Liu <wei.liu2@citrix.com>, Ian Campbell <Ian.Campbell@citrix.com>, Wen Congyang <wency@cn.fujitsu.com>, Tim Deegan <tim@xen.org>, Ian Jackson <Ian.Jackson@eu.citrix.com>, Ross Lagerwall <ross.lagerwall@citrix.com>, David Vrabel <david.vrabel@citrix.com>, Shriram Rajagopalan <rshriram@cs.ubc.ca>, Hongyang Yang <yanghy@cn.fujitsu.com>, Vijay Kilari <vijay.kilari@gmail.com>
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El 02/04/15 a les 20.32, Andrew Cooper ha escrit:
> Presented here is v8 of the Migration v2 series (libxc subset), which is able
> to function when transparently inserted under an unmodified xl/libxl.
> 
> There are numerous tweaks in v8 (fix build with MiniOS, tweak some code to
> appease Coverity, style fixes, clarification of some error messages) but no
> major changes from the previous version.  It is my belief that the libxc
> changes are functionally complete.
> 
> This series can be found on a 'saverestore2-v8' at
>   http://xenbits.xen.org/git-http/people/andrewcoop/xen.git
> 
> To experiment, simply set XG_MIGRATION_V2 in xl's environment.  For migration,
> the easiest way is to tweak libxl-save-helper to be a shell script
> 
>   root@vitruvias:/home# cat /usr/lib/xen/bin/libxl-save-helper
>   #!/bin/bash
>   export XG_MIGRATION_V2=x
>   exec /usr/lib/xen/bin/libxl-save-helper.bin "$@"
> 
> which will ensure that XG_MIGRATION_V2 gets set in the environment for both
> the source and destination of migration.
> 
>   Patches 1 and 2 are prerequisites
>   Patches 3 to 13 are the meat of the series
>   Patch 14 is the design document
>   Patch 15 is the compat layer for unmodified libxl
> 
> Please experiment!

As requested by Andrew I've tested them on a PVH Dom0 and it removes the
need to enable the MMU_MACHPHYS_UPDATE hypercall on a PVH Dom0 in order
to migrate PV guests.

Roger.