core: dbus: track bus names per unit (v2) #894
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Currently, PID1 installs an unfiltered NameOwnerChanged signal match, and dispatches the signals itself. This does not scale, as right now, PID1 wakes up every time a bus client connects. To fix this, install individual matches once they are requested by unit_watch_bus_name(), and remove the watches again through their slot in unit_unwatch_bus_name(). If the bus is not available during unit_watch_bus_name(), just store name in the 'watch_bus' hashmap, and let bus_setup_api() do the installing later.
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Looks good to merge if Semaphore agrees too! |
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core: dbus: track bus names per unit (v2)
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Currently, PID1 installs an unfiltered
NameOwnerChangedsignal match, anddispatches the signals itself. This does not scale, as right now, PID1
wakes up every time a bus client connects.
To fix this, install individual matches once they are requested by
unit_watch_bus_name(), and remove the watches again through their slot inunit_unwatch_bus_name().If the bus is not available during
unit_watch_bus_name(), just storename in the
watch_bushashmap, and letbus_setup_api()do the installinglater.
Obsoletes #887