From: Wei Liu <wei.liu2@citrix.com>
To: Juergen Gross <jgross@suse.com>
Cc: wei.liu2@citrix.com, Ian.Campbell@citrix.com,
stefano.stabellini@eu.citrix.com, andrew.cooper3@citrix.com,
ian.jackson@eu.citrix.com, xen-devel@lists.xen.org
Subject: Re: [PATCH v3 3/4] libxc: stop migration in case of p2m list structural changes
Date: Wed, 6 Jan 2016 15:40:14 +0000 [thread overview]
Message-ID: <20160106154014.GK27789@citrix.com> (raw)
In-Reply-To: <1450257860-11389-4-git-send-email-jgross@suse.com>
On Wed, Dec 16, 2015 at 10:24:19AM +0100, Juergen Gross wrote:
> With support of the virtual mapped linear p2m list for migration it is
> now possible to detect structural changes of the p2m list which before
> would either lead to a crashing or otherwise wrong behaving domU.
>
> A guest supporting the linear p2m list will increment the
> p2m_generation counter located in the shared info page before and after
> each modification of a mapping related to the p2m list. A change of
> that counter can be detected by the tools and reacted upon.
>
> As such a change should occur only very rarely once the domU is up the
> most simple reaction is to cancel migration in such an event.
>
> Signed-off-by: Juergen Gross <jgross@suse.com>
> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
next prev parent reply other threads:[~2016-01-06 15:40 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-16 9:24 [PATCH v3 0/4] support linear p2m list in migrate stream v2 Juergen Gross
2015-12-16 9:24 ` [PATCH v3 1/4] libxc: split mapping p2m leaves into a separate function Juergen Gross
2016-01-06 15:39 ` Wei Liu
2015-12-16 9:24 ` [PATCH v3 2/4] libxc: support of linear p2m list for migration of pv-domains Juergen Gross
2016-01-06 15:40 ` Wei Liu
2016-01-07 10:21 ` Juergen Gross
2016-01-07 10:33 ` Wei Liu
2016-01-07 10:37 ` Juergen Gross
2015-12-16 9:24 ` [PATCH v3 3/4] libxc: stop migration in case of p2m list structural changes Juergen Gross
2016-01-06 15:40 ` Wei Liu [this message]
2015-12-16 9:24 ` [PATCH v3 4/4] libxc: set flag for support of linear p2m list in domain builder Juergen Gross
2016-01-06 15:40 ` Wei Liu
2016-01-06 16:05 ` Ian Campbell
2016-01-07 7:02 ` Juergen Gross
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