Lines Matching +full:multi +full:- +full:function
26 A more novel use of CPU-hotplug support is its use today in suspend resume
27 support for SMP. Dual-core and HT support makes even a laptop run SMP kernels
81 from the map depending on the event is hot-add/hot-remove. There are currently
86 be read-only for most use. When setting up per-cpu resources almost always use
100 $ ls -lh /sys/devices/system/cpu
102 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu0
103 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu1
104 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu2
105 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu3
106 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu4
107 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu5
108 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu6
109 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu7
110 drwxr-xr-x 2 root root 0 Dec 21 16:33 hotplug
111 -r--r--r-- 1 root root 4.0K Dec 21 16:33 offline
112 -r--r--r-- 1 root root 4.0K Dec 21 16:33 online
113 -r--r--r-- 1 root root 4.0K Dec 21 16:33 possible
114 -r--r--r-- 1 root root 4.0K Dec 21 16:33 present
146 ----------------
167 -------------------------
175 callbacks of a state are set up or an instance is added to a multi-instance
181 removed from a multi-instance state.
184 operations (CPU online or CPU offline) then the other not-required callback
246 -----------------------------
251 [CPUHP_OFFLINE + 1]->startup() -> success
252 [CPUHP_OFFLINE + 2]->startup() -> success
253 [CPUHP_OFFLINE + 3] -> skipped because startup == NULL
255 [CPUHP_BRINGUP_CPU]->startup() -> success
257 [CPUHP_BRINGUP_CPU + 1]->startup() -> success
259 [CPUHP_AP_ONLINE]->startup() -> success
261 [CPUHP_AP_ONLINE + 1]->startup() -> success
263 [CPUHP_ONLINE - 1]->startup() -> success
269 [CPUHP_ONLINE - 1]->teardown() -> success
271 [CPUHP_AP_ONLINE + 1]->teardown() -> success
273 [CPUHP_AP_ONLINE]->teardown() -> success
275 [CPUHP_BRINGUP_ONLINE - 1]->teardown()
278 [CPUHP_BRINGUP_CPU]->teardown()
279 [CPUHP_OFFLINE + 3]->teardown()
280 [CPUHP_OFFLINE + 2] -> skipped because teardown == NULL
281 [CPUHP_OFFLINE + 1]->teardown()
287 [CPUHP_OFFLINE + 1]->startup() -> success
288 [CPUHP_OFFLINE + 2]->startup() -> success
289 [CPUHP_OFFLINE + 3] -> skipped because startup == NULL
291 [CPUHP_BRINGUP_CPU]->startup() -> success
293 [CPUHP_BRINGUP_CPU + 1]->startup() -> success
295 [CPUHP_AP_ONLINE]->startup() -> success
297 [CPUHP_AP_ONLINE + 1]->startup() -> success
298 ---
299 [CPUHP_AP_ONLINE + N]->startup() -> fail
300 [CPUHP_AP_ONLINE + (N - 1)]->teardown()
302 [CPUHP_AP_ONLINE + 1]->teardown()
304 [CPUHP_AP_ONLINE]->teardown()
306 [CPUHP_BRINGUP_ONLINE - 1]->teardown()
309 [CPUHP_BRINGUP_CPU]->teardown()
310 [CPUHP_OFFLINE + 3]->teardown()
311 [CPUHP_OFFLINE + 2] -> skipped because teardown == NULL
312 [CPUHP_OFFLINE + 1]->teardown()
318 [CPUHP_ONLINE - 1]->teardown() -> success
320 [CPUHP_ONLINE - N]->teardown() -> fail
321 [CPUHP_ONLINE - (N - 1)]->startup()
323 [CPUHP_ONLINE - 1]->startup()
330 [CPUHP_ONLINE - 1]->teardown() -> success
332 [CPUHP_ONLINE - N]->teardown() -> fail
333 [CPUHP_ONLINE - (N - 1)]->startup() -> success
334 [CPUHP_ONLINE - (N - 2)]->startup() -> fail
339 [CPUHP_ONLINE - (N - 1)]->teardown() -> success
340 [CPUHP_ONLINE - N]->teardown() -> fail
341 [CPUHP_ONLINE - (N - 1)]->startup() -> success
342 [CPUHP_ONLINE - (N - 2)]->startup() -> fail
343 [CPUHP_ONLINE - (N - 1)]->teardown() -> success
344 [CPUHP_ONLINE - N]->teardown() -> fail
348 [CPUHP_ONLINE - (N - 1)]
354 ------------------
380 by the setup function and returned to the caller on success.
387 ----------------------------
398 hotplug core provides multi-instance support. The advantage over driver
402 multi-instance state the following function is available:
407 constants for dynamically allocated states - CPUHP_PREPARE_DYN,
408 CPUHP_ONLINE_DYN - depending on the state section (PREPARE, ONLINE) for
439 The @startup argument is a function pointer to the callback which should be
443 The @teardown argument is a function pointer to the callback which should
460 0 .. N-1 is invoked to rollback the operation. The state setup fails,
465 hotplug operations. If the setup function has to be called from a CPU
469 The function return values:
478 as @state argument for the state remove function. For
479 multi-instance states the dynamically allocated state number is
487 ------------------------------
516 hotplug operations. If the remove function has to be called from a CPU
520 If a multi-instance state is removed then the caller has to remove all
523 Multi-Instance state instance management
524 ----------------------------------------
526 Once the multi-instance state is set up, instances can be added to the
536 instance's data structure. The pointer is handed to the multi-instance
543 multi-instance state's node list.
554 0 .. N-1 is invoked to rollback the operation, the function fails and
555 the instance is not added to the node list of the multi-instance state.
586 --------
615 Setup, use and teardown a dynamically allocated multi-instance state in the
622 ret = cpuhp_state_add_instance(state, &inst1->node);
626 ret = cpuhp_state_add_instance(state, &inst2->node);
630 cpuhp_remove_instance(state, &inst1->node);
632 cpuhp_remove_instance(state, &inst2->node);
652 141: acpi/cpu-drv:online
677 # TASK-PID CPU# TIMESTAMP FUNCTION
679 bash-394 [001] 22.976: cpuhp_enter: cpu: 0004 target: 140 step: 169 (cpuhp_kick_ap_work)
680 cpuhp/4-31 [004] 22.977: cpuhp_enter: cpu: 0004 target: 140 step: 168 (sched_cpu_deactivate)
681 cpuhp/4-31 [004] 22.990: cpuhp_exit: cpu: 0004 state: 168 step: 168 ret: 0
682 cpuhp/4-31 [004] 22.991: cpuhp_enter: cpu: 0004 target: 140 step: 144 (mce_cpu_pre_down)
683 cpuhp/4-31 [004] 22.992: cpuhp_exit: cpu: 0004 state: 144 step: 144 ret: 0
684 …cpuhp/4-31 [004] 22.993: cpuhp_multi_enter: cpu: 0004 target: 140 step: 143 (virtnet_cpu_down_p…
685 cpuhp/4-31 [004] 22.994: cpuhp_exit: cpu: 0004 state: 143 step: 143 ret: 0
686 cpuhp/4-31 [004] 22.995: cpuhp_enter: cpu: 0004 target: 140 step: 142 (cacheinfo_cpu_pre_down)
687 cpuhp/4-31 [004] 22.996: cpuhp_exit: cpu: 0004 state: 142 step: 142 ret: 0
688 bash-394 [001] 22.997: cpuhp_exit: cpu: 0004 state: 140 step: 169 ret: 0
689 bash-394 [005] 95.540: cpuhp_enter: cpu: 0004 target: 169 step: 140 (cpuhp_kick_ap_work)
690 cpuhp/4-31 [004] 95.541: cpuhp_enter: cpu: 0004 target: 169 step: 141 (acpi_soft_cpu_online)
691 cpuhp/4-31 [004] 95.542: cpuhp_exit: cpu: 0004 state: 141 step: 141 ret: 0
692 cpuhp/4-31 [004] 95.543: cpuhp_enter: cpu: 0004 target: 169 step: 142 (cacheinfo_cpu_online)
693 cpuhp/4-31 [004] 95.544: cpuhp_exit: cpu: 0004 state: 142 step: 142 ret: 0
694 …cpuhp/4-31 [004] 95.545: cpuhp_multi_enter: cpu: 0004 target: 169 step: 143 (virtnet_cpu_online)
695 cpuhp/4-31 [004] 95.546: cpuhp_exit: cpu: 0004 state: 143 step: 143 ret: 0
696 cpuhp/4-31 [004] 95.547: cpuhp_enter: cpu: 0004 target: 169 step: 144 (mce_cpu_online)
697 cpuhp/4-31 [004] 95.548: cpuhp_exit: cpu: 0004 state: 144 step: 144 ret: 0
698 cpuhp/4-31 [004] 95.549: cpuhp_enter: cpu: 0004 target: 169 step: 145 (console_cpu_notify)
699 cpuhp/4-31 [004] 95.550: cpuhp_exit: cpu: 0004 state: 145 step: 145 ret: 0
700 cpuhp/4-31 [004] 95.551: cpuhp_enter: cpu: 0004 target: 169 step: 168 (sched_cpu_activate)
701 cpuhp/4-31 [004] 95.552: cpuhp_exit: cpu: 0004 state: 168 step: 168 ret: 0
702 bash-394 [005] 95.553: cpuhp_exit: cpu: 0004 state: 169 step: 140 ret: 0
756 .. kernel-doc:: include/linux/cpuhotplug.h