4 ms·
It is mentioned in the glibc bug tracker entry as a replacement to the polling. systemd didn't use it because they thought it would be impossible for a library
by gpderetta 3y ago
It is mentioned in the glibc bug tracker entry as a replacement to the polling. systemd didn't use it because they thought it would be impossible for a library using to be dlclose'd as there is no way to unregister the callback. But apparently glibc has (undocumented) magic under the hood to take care of it.