Ian Jackson writes ("Re: [PATCH v2 5/5] libxl: spawns two QEMUs for HVM
guests"):
> The spawn_outcome function does something like this:
>
> int worst_rc = 0;
>
> libxl_report_child_exitstatus(...)
> dcs->qemus[myself]->rc = status ? ERROR_QEMU_DIED : 0;
>
> for (i=0; i<n_qemus; i++) {
> if (libxl__ev_child_inuse(&dcs->qemus[i].childw))
> return;
> if (dcs->qemus[i].rc IS WORSE THAN worst_rc)
> worst_rc = dcs->qemus[i].rc;
> }
> /* all qemus have completed */
> if (worst_rc)
> domcreate_complete(egc, dcs, worst_rc)
> else
> domain_create_do_next_thing(egc, dcs, ...);
... except you're using libxl__spawn, not libxl__ev_child, so you
don't get status but rather rc and you don't need to call
libxl_report_child_exitstatus, and instead of a childw you probably
have a dmss. But the principles are the same.
Ian.
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