Dear systemd folks,
Trying to decrease the start-up time, I noticed that `systemd-logind`
probes devices in serial(?) (instead of parallel).
From `manager_enumerate_buttons(Manager *m)` in `src/login/logind.c`:
```
udev_list_entry_foreach(item, first) {
_cleanup_(udev_device_unrefp) struct udev_device *d = NULL;
int k;
d = udev_device_new_from_syspath(m->udev,
udev_list_entry_get_name(item));
if (!d)
return -ENOMEM;
k = manager_process_button_device(m, d);
if (k < 0)
r = k;
}
```
The macro is defined as below:
```
/**
* udev_list_entry_foreach:
* @list_entry: entry to store the current position
* @first_entry: first entry to start with
*
* Helper to iterate over all entries of a list.
*/
#define udev_list_entry_foreach(list_entry, first_entry) \
for (list_entry = first_entry; \
list_entry != NULL; \
list_entry = udev_list_entry_get_next(list_entry))
```
Is there a way to do that in parallel?
Kind regards,
Paul
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