[Xen-devel] How to enable qemu-dm tracing in XEN

[openlui <openlui@xxxxxxx>]

Hi:

    I want to enable qemu-dm's tracing in XEN. I have built qemu with "make debug=y tools" command, and found that during building, qemu is configured with "trace_backend=stderr" option. However, there aren't any  trace log in /var/log/qemu/qemu-dm-{domain_name}.log. I have also tried to call "trace_event_set_state_dynamic(EVENT_ID, true)" in code, but there are still no trace info output in log file.

   Could anyone give me some advice about it?  Thanks.

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