common/os/callout.c

213 		 * If the next expiration of the cyclic is way out into	\
219 		 * We have multiple callouts to process. But the cyclic	\
383  * cyclic if needed.
392 	 * the cyclic needs to be reprogrammed as we have an earlier
395 	 * Also, during the CPR suspend phase, do not reprogram the cyclic.
397 	 * entered, the cyclic will be programmed for the earliest expiration
495 	 * We need to return the expiration to help program the cyclic.
496 	 * If there are expired callouts, the cyclic needs to go off
653 	 * the cyclic needs to be reprogrammed as we have an earlier
656 	 * Also, during the CPR suspend phase, do not reprogram the cyclic.
658 	 * entered, the cyclic will be programmed for the earliest expiration
814 	 * just return. The cyclic has already been programmed to
815 	 * infinity by the cyclic subsystem.
822 	 * delay the cyclic expire so that they can be processed together.
824 	 * with cyclic activity.
856  * new expiration to the caller so he can reprogram the cyclic accordingly.
955 	 * We need to return the expiration to help program the cyclic.
956 	 * If there are expired callouts, the cyclic needs to go off
972  * Realtime callouts are handled at CY_LOW_PIL by a cyclic handler. So,
975  * cyclic handlers to complete while holding cpu_lock. So, if a realtime
1001 	 * throughout. If we needed to reprogram the callout table's cyclic,
1029 		 * in a while, no need to reprogram the cyclic if the root
1162 		 * This will also reprogram the cyclic, if the expiration
1313 			 * don't reprogram the table cyclic here. This is in
1537  * The cyclic handlers below process callouts in two steps:
1546  *	   the cyclic to and reprogram it. We can do this right at the end
1548  *	2. The realtime cyclic handler expires callouts in place. However,
1555  * Realtime callout cyclic handlers.
1584  * Normal callout cyclic handlers.
1709  * The cyclic subsystem saves and restores hrtime during CPR.
1754  * table's cyclic to expire immediately so that the callouts can be executed
1862 	cyclic_id_t cyclic, qcyclic;
1897 	 * cyclic has been initialized.
1903 	 * could potentially expand the cyclic heap. We don't want to be
1906 	 * point. So, only one thread can be executing the cyclic add logic
1914 	 * The realtime cyclic handler executes at low PIL. The normal cyclic
1917 	 * to unblock it directly or indirectly. If the normal cyclic were to
1934 	cyclic = cyclic_add(&hdlr, &when);
1944 	ct->ct_cyclic = cyclic;
2039 		 * Unbind the cyclics. This will allow the cyclic subsystem