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Re: [PATCH] xen/dom0less: Clear xenstore page
- To: Jason Andryuk <jason.andryuk@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: "Orzel, Michal" <michal.orzel@xxxxxxx>
- Date: Fri, 22 Aug 2025 09:52:14 +0200
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>
- Delivery-date: Fri, 22 Aug 2025 07:52:29 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 20/08/2025 23:12, Jason Andryuk wrote:
> C Xenstored was seen failing to map a domU's event channel. Enhancing
> Xen's error messages shows:
> common/event_channel.c:427:d0v0 EVTCHNOP failure: d1, port 3267543746 error
> -22
>
> Port 3267543746 is 0xc2c2c2c2 - SCRUB_PATTERN.
>
> Xenstore expects a non-zero evtchn_port to be valid. Explicitly zero
> the page to avoid this.
>
> Fixes: f78895ad78c9 ("tools/xenstored: Read event channel from xenstored
> page")
> Signed-off-by: Jason Andryuk <jason.andryuk@xxxxxxx>
Acked-by: Michal Orzel <michal.orzel@xxxxxxx>
~Michal
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