From: David Vrabel <david.vrabel@citrix.com>
To: Tim Deegan <tim@xen.org>, Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Andrew Jones <drjones@redhat.com>, Keir Fraser <keir@xen.org>,
Ian Campbell <ian.campbell@citrix.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Julien Grall <julien.grall@linaro.org>,
Ian Jackson <ian.jackson@eu.citrix.com>,
Olaf Hering <olaf@aepfle.de>,
David Vrabel <david.vrabel@citrix.com>,
Jan Beulich <jbeulich@suse.com>,
xen-devel@lists.xenproject.org, Wei Liu <wei.liu2@citrix.com>,
Daniel De Graaf <dgdegra@tycho.nsa.gov>
Subject: Re: [PATCH RFC 1/4] xen: evtchn: make evtchn_reset() ready for soft reset
Date: Thu, 4 Jun 2015 16:19:40 +0100 [thread overview]
Message-ID: <55706C8C.6090607@citrix.com> (raw)
In-Reply-To: <20150604140556.GF74656@deinos.phlegethon.org>
On 04/06/15 15:05, Tim Deegan wrote:
> At 15:35 +0200 on 03 Jun (1433345719), Vitaly Kuznetsov wrote:
>> We need to close all event channel so the domain performing soft reset
>> will be able to open them back. Interdomain channels are, however,
>> special. We need to keep track of who opened it as in (the most common)
>> case it was opened by the control domain we won't be able (and allowed) to
>> re-establish it.
>
>
> I'm not sure I understand -- can you give an example of what this is
> avoiding? I would have thought that the kexec'ing VM needs to tear
> down _all_ its connections and then restart the ones it wantrs in the
> new OS.
There are some that are in state ECS_UNBOUND (console, xenstore, I
think) at start of day that are allocated on behalf of the domain by the
toolstack. The kexec'd image will expect them in these same state.
David
next prev parent reply other threads:[~2015-06-04 15:21 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-03 13:35 [PATCH RFC 0/4] 'reset everything' approach to PVHVM guest kexec Vitaly Kuznetsov
2015-06-03 13:35 ` [PATCH RFC 1/4] xen: evtchn: make evtchn_reset() ready for soft reset Vitaly Kuznetsov
2015-06-04 14:05 ` Tim Deegan
2015-06-04 15:19 ` David Vrabel [this message]
2015-06-04 15:47 ` Tim Deegan
2015-06-05 8:52 ` Jan Beulich
2015-06-05 8:58 ` Ian Campbell
2015-06-05 9:07 ` Jan Beulich
2015-06-08 14:10 ` Jan Beulich
2015-06-08 15:05 ` Vitaly Kuznetsov
2015-06-03 13:35 ` [PATCH RFC 2/4] xen: grant_table: implement grant_table_soft_reset() Vitaly Kuznetsov
2015-06-04 14:11 ` Tim Deegan
2015-06-04 15:22 ` David Vrabel
2015-06-04 15:44 ` Tim Deegan
2015-06-08 14:26 ` Jan Beulich
2015-06-08 14:58 ` Vitaly Kuznetsov
2015-06-08 15:35 ` Jan Beulich
2015-06-03 13:35 ` [PATCH RFC 3/4] xen: implement SCHEDOP_soft_reset Vitaly Kuznetsov
2015-06-08 14:31 ` Jan Beulich
2015-06-22 16:00 ` Vitaly Kuznetsov
2015-06-22 16:06 ` Jan Beulich
2015-06-22 16:24 ` Vitaly Kuznetsov
2015-06-23 7:13 ` Jan Beulich
2015-06-23 12:10 ` Vitaly Kuznetsov
2015-06-23 12:52 ` Jan Beulich
2015-06-03 13:35 ` [PATCH RFC 4/4] xen: arch-specific hooks for domain_soft_reset() Vitaly Kuznetsov
2015-06-04 14:19 ` Tim Deegan
2015-06-22 9:44 ` Vitaly Kuznetsov
2015-06-25 9:57 ` Tim Deegan
2015-06-08 15:32 ` Jan Beulich
2015-06-08 15:59 ` Vitaly Kuznetsov
2015-06-04 14:22 ` [PATCH RFC 0/4] 'reset everything' approach to PVHVM guest kexec Tim Deegan
2015-06-08 15:38 ` Ian Jackson
2015-06-08 15:53 ` Wei Liu
2015-06-08 17:43 ` Wei Liu
2015-06-09 8:19 ` Dave Scott
2015-06-09 9:29 ` Wei Liu
2015-06-09 9:38 ` Wei Liu
2015-06-09 10:02 ` Dave Scott
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