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Re: [PATCH v2 0/9] tools/xenstored: add support for watch depth feature
- To: Juergen Gross <jgross@xxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 21 Apr 2026 09:55:17 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 21 Apr 2026 07:55:31 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 21.04.2026 09:42, Juergen Gross wrote:
> In order to reduce excessive number of watch events the watch depth
> feature has been defined, allowing the user to limit the number of
> node levels below the watched node to cause events.
>
> This series is implementing this feature for xenstored (including the
> PV and PVH stubdom variants).
>
> Possible users are:
>
> - xl/libxl: use domid information for the special @introduceDomain and
> @releaseDomain watches, which will be available when using depth = 1
>
> - xenconsoled, like xl/libxl
>
> - any PV-device backends watching directories for added devices (no
> watch events when any device specific node is modified)
>
> - any PV-device frontend and backend watching the "state" node of the
> other side, in case the other side plays dirty games by building
> large sub-trees beneath the "state" node
>
> Changes in V2:
> - some minor stale changes reverted
> - last patch covered by the series now, man page updated
Is this really everything that changed? I wanted to commit the first two
patches from v1, but I had to leave out patch 1 as it didn't apply. Patch
2 I have in pre-push testing already, but as mentioned on Matrix there's
a so far unexplained build issue (definitely not related to this series,
though).
Jan
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