Re: [Xen-devel] [PATCH v3] libxl: trigger attach events for devices attached before xl devd startup

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Sat, Jul 16, 2016 at 01:47:56AM +0200, Marek Marczykowski-Górecki wrote:
> When this daemon is started after creating backend device, that device
> will not be configured.
> 
> Racy situation:
> 1. driver domain is started
> 2. frontend domain is started (just after kicking driver domain off)
> 3. device in frontend domain is connected to the backend (as specified
>    in frontend domain configuration)
> 4. xl devd is started in driver domain
> 
> End result is that backend device in driver domain is not configured
> (like network interface is not enabled), so the device doesn't work.
> 
> Fix this by artifically triggering events for devices already present in
> xenstore before xl devd is started. Do this only after xenstore watch is
> already registered, and only for devices not already initialized (in
> XenbusStateInitWait state).
> 
> Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
> Signed-off-by: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>

Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

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