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List:       xen-users
Subject:    re: Update and error on QMP socket
From:       Pry Mar <pryorm09 () gmail ! com>
Date:       2021-12-06 19:08:20
Message-ID: CAHnBbQ9U_5kwhht97ZfiXP=82FhPQrEi6p=P_5Vf07xztrJhiA () mail ! gmail ! com
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Ronny,

<quote>
today i update (compile) my Debian Bullseye Server from xen 4.15.1 to
4.16.0 and i see a fail message when i start my DomU's.

Fail:

arsing config from /etc/xen/domU.cfg
libxl: error: libxl_qmp.c:1400:qmp_ev_fd_callback: Domain 1:error on QMP
</quote>

its a major version change to get to xen-4.16.0 from xen-4.15.1., not an update.
The qemu-xen build has a new meson build system, with extra build-deps.
You need: meson ninja-build liblzo2-dev

New is libxenstore.so.4, while your system might still have
libxenstore.so.3 in tree.

If xen-qemu-dom0-disk-backend.service never started you might get the
shown error.
systemctl status xen-qemu-dom0-disk-backend.service

In my Bullseye 4.16.0 build
qemu-system-i386 is 14.5 MB.

regards,
PryMar56

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