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Re: [XEN PATCH v2 4/5] xenstored: send an evtchn notification on introduce_domain
- To: Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Bertrand Marquis <Bertrand.Marquis@xxxxxxx>
- Date: Thu, 13 Jan 2022 10:18:22 +0000
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- Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, "jgross@xxxxxxxx" <jgross@xxxxxxxx>, "julien@xxxxxxx" <julien@xxxxxxx>, "Volodymyr_Babchuk@xxxxxxxx" <Volodymyr_Babchuk@xxxxxxxx>, Luca Miccio <lucmiccio@xxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>
- Delivery-date: Thu, 13 Jan 2022 10:18:53 +0000
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- Thread-topic: [XEN PATCH v2 4/5] xenstored: send an evtchn notification on introduce_domain
Hi Stefano,
> On 13 Jan 2022, at 00:58, Stefano Stabellini <sstabellini@xxxxxxxxxx> wrote:
>
> From: Luca Miccio <lucmiccio@xxxxxxxxx>
>
> When xs_introduce_domain is called, send out a notification on the
> xenstore event channel so that any (dom0less) domain waiting for the
> xenstore interface to be ready can continue with the initialization.
>
> The extra notification is harmless for domains that don't require it.
>
> Signed-off-by: Luca Miccio <lucmiccio@xxxxxxxxx>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>
Reviewed-by: Bertrand Marquis <bertrand.marquis@xxxxxxx>
Cheers
Bertrand
> ---
> Changes in v2:
> - drop the new late_init parameter
> ---
> tools/xenstore/xenstored_domain.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/tools/xenstore/xenstored_domain.c
> b/tools/xenstore/xenstored_domain.c
> index d03c7d93a9..7487129e47 100644
> --- a/tools/xenstore/xenstored_domain.c
> +++ b/tools/xenstore/xenstored_domain.c
> @@ -461,6 +461,9 @@ static struct domain *introduce_domain(const void *ctx,
> /* Now domain belongs to its connection. */
> talloc_steal(domain->conn, domain);
>
> + /* Notify the domain that xenstore is available */
> + xenevtchn_notify(xce_handle, domain->port);
> +
> if (!is_master_domain && !restore)
> fire_watches(NULL, ctx, "@introduceDomain", NULL,
> false, NULL);
> --
> 2.25.1
>
>
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