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Re: [PATCH v2 1/2] xl: Keep monitoring suspended domain
- To: Anthony PERARD <anthony.perard@xxxxxxxxxx>, Jason Andryuk <jason.andryuk@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 2 Dec 2024 09:53:29 +0100
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- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 02 Dec 2024 08:53:41 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 28.11.2024 17:45, Anthony PERARD wrote:
> On Tue, Nov 26, 2024 at 12:19:40PM -0500, Jason Andryuk wrote:
>> When a VM transitioned to LIBXL_SHUTDOWN_REASON_SUSPEND, the xl daemon
>> was exiting as 0 = DOMAIN_RESTART_NONE "No domain restart".
>> Later, when the VM actually shutdown, the missing xl daemon meant the
>> domain wasn't cleaned up properly.
>>
>> Add a new DOMAIN_RESTART_SUSPENDED to handle the case. The xl daemon
>> keeps running to react to future shutdown events.
>>
>> The domain death event needs to be re-enabled to catch subsequent
>> events. The libxl_evgen_domain_death is moved from death_list to
>> death_reported, and then it isn't found on subsequent iterations through
>> death_list. We enable the new event before disabling the old event, to
>> keep the xenstore watch active. If it is unregistered and
>> re-registered, it'll fire immediately for our suspended domain which
>> will end up continuously re-triggering.
>>
>> Signed-off-by: Jason Andryuk <jason.andryuk@xxxxxxx>
>
> Reviewed-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
While committing I was wondering: Does this want/need backporting (and hence
was it perhaps lacking a Fixes: tag)?
Jan
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