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/linux/drivers/s390/crypto/
H A Dzcrypt_queue.c46 int online = aq->config && !aq->chkstop && zq->online ? 1 : 0; in online_show() local
48 return sysfs_emit(buf, "%d\n", online); in online_show()
58 int online; in online_store() local
60 if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1) in online_store()
63 if (online && (!aq->config || !aq->card->config || in online_store()
66 if (online && !zc->online) in online_store()
104 zcrypt_queue_force_online(struct zcrypt_queue * zq,int online) zcrypt_queue_force_online() argument
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H A Dzcrypt_card.c56 int online = ac->config && !ac->chkstop && zc->online ? 1 : 0; in online_show() local
58 return sysfs_emit(buf, "%d\n", online); in online_show()
68 int online, id, i = 0, maxzqs = 0; in online_store() local
71 if (sscanf(buf, "%d\n", &online) != 1 || online < 0 || online > 1) in online_store()
74 if (online && (!ac->config || ac->chkstop)) in online_store()
77 zc->online = online; in online_store()
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/linux/tools/testing/selftests/cpu-hotplug/
H A Dcpu-on-off-test.sh32 echo "CPU online/offline summary:"
33 online_cpus=`cat $SYSFS/devices/system/cpu/online`
45 echo -e "\t Cpus in online state: $online_cpus"
64 if [ -f $cpu/online ] && grep -q $state $cpu/online; then
82 grep -q 1 $SYSFS/devices/system/cpu/cpu$1/online
87 grep -q 0 $SYSFS/devices/system/cpu/cpu$1/online
92 echo 1 > $SYSFS/devices/system/cpu/cpu$1/online
97 echo 0 > $SYSFS/devices/system/cpu/cpu$1/online
121 echo $FUNCNAME $cpu: unexpected online >
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/linux/Documentation/core-api/
H A Dcpu_hotplug.rst36 other CPUs later online.
41 those CPUs can not be brought online later.
65 Bitmap of all CPUs currently online. Its set in ``__cpu_up()``
73 of them may be online. When physical hotplug is processed by the relevant
106 -r--r--r-- 1 root root 4.0K Dec 21 16:33 online
110 The files *offline*, *online*, *possible*, *present* represent the CPU masks.
111 Each CPU folder contains an *online* file which controls the logical on (1) and
114 $ echo 0 > /sys/devices/system/cpu/cpu4/online
119 bring CPU4 back online::
121 $ echo 1 > /sys/devices/system/cpu/cpu4/online
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H A Dmemory-hotplug.rst26 Generated when memory has successfully brought online. The callback may
64 - start_pfn is start_pfn of online/offline memory.
65 - nr_pages is # of pages of online/offline memory.
165 - synchronize against online/offline requests (e.g. via sysfs). This way, memory
166 block devices can only be accessed (.online/.state attributes) by user
172 device_hotplug_lock when adding memory and user space tries to online that
/linux/tools/testing/selftests/memory-hotplug/
H A Dmem-on-off-test.sh58 hotpluggable_memory online
63 grep -q online $SYSFS/devices/system/memory/memory$1/state
73 echo online > $SYSFS/devices/system/memory/memory$1/state
103 echo $FUNCNAME $memory: unexpected online >&2
184 # Online all hot-pluggable memory
187 echo -e "\t online all hot-pluggable memory in offline state:"
190 echo "offline->online memory$memory"
204 echo -e "\t offline $ratio% hot-pluggable memory in online state"
208 echo "online->offline memory$memory"
223 # Online al
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/linux/tools/testing/selftests/ftrace/test.d/ftrace/
H A Dfunc_hotplug.tc19 # Find online cpu
21 if [ -f $i/online ] && [ "$(cat $i/online)" = "1" ]; then
28 echo "We cannot test cpu hotplug with a single cpu online"
35 : "Set $(basename $cpu) offline/online with function tracer enabled"
38 (echo 0 > $cpu/online)
40 (echo 1 > $cpu/online)
/linux/Documentation/arch/s390/
H A Ddriver-model.rst49 online:
50 An interface to set the device online and offline.
52 notify function under 1.2), piping 0 to online will forcibly delete
77 via the 'online' interface.
93 int online;
161 activated via the 'online' attribute. The driver should finally
171 verified that the device is not already online.
175 de-activated via the 'online' attribute. The driver should shut
185 verified that the device is online.
194 * In online stat
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/linux/Documentation/admin-guide/
H A Dcputopology.rst61 offline: CPUs that are not online because they have been
66 online: CPUs that are online and being scheduled [cpu_online_mask]
69 brought online if they are present. [cpu_possible_mask]
80 being 32. Note also that CPUs 2 and 4-31 are not online but could be
81 brought online as they are both present and possible::
85 online: 0-1,3
92 online.)::
96 online: 0-1,3
/linux/drivers/power/supply/
H A D88pm860x_charger.c107 unsigned online:1; /* usb charger */ member
274 if (vbatt > CHARGE_THRESHOLD && info->online) in stop_charge()
317 (info->online) ? "online" : "N/A", in set_charging_fsm()
323 if (info->online && info->present && info->allowed) { in set_charging_fsm()
344 if (info->online && info->present && info->allowed) { in set_charging_fsm()
355 if (info->online && info->present && info->allowed) { in set_charging_fsm()
366 if (info->online && info->present && info->allowed) { in set_charging_fsm()
377 else if (vbatt > CHARGE_THRESHOLD && info->online) in set_charging_fsm()
389 (info->online) in set_charging_fsm()
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/linux/Documentation/admin-guide/mm/
H A Dmemory-hotplug.rst140 make use of that memory: the memory block has to be "online".
145 The Linux kernel can be configured to automatically online added memory blocks
160 % echo online > /sys/devices/system/memory/memoryXXX/state
164 % echo 1 > /sys/devices/system/memory/memoryXXX/online
179 be "online". If it fails, the state of the memory block will remain unchanged
189 The configured auto-online behavior can be observed via::
193 Auto-onlining can be enabled by writing ``online``, ``online_kernel`` or
196 % echo online > /sys/devices/system/memory/auto_online_blocks
198 Similarly to manual onlining, with ``online`` the kernel will select the
201 Modifying the auto-online behavio
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/linux/tools/testing/selftests/bpf/prog_tests/
H A Dperf_buffer.c54 bool *online; in serial_test_perf_buffer() local
60 err = parse_cpu_mask_file("/sys/devices/system/cpu/online", in serial_test_perf_buffer()
61 &online, &on_len); in serial_test_perf_buffer()
66 if (online[i]) in serial_test_perf_buffer()
95 if (i >= on_len || !online[i]) { in serial_test_perf_buffer()
118 if (i >= on_len || !online[i]) in serial_test_perf_buffer()
146 free(online); in serial_test_perf_buffer()
H A Draw_tp_test_run.c15 bool *online = NULL; in test_raw_tp_test_run() local
22 err = parse_cpu_mask_file("/sys/devices/system/cpu/online", &online, in test_raw_tp_test_run()
58 if (!online[i]) in test_raw_tp_test_run()
85 free(online); in test_raw_tp_test_run()
/linux/tools/testing/selftests/sched_ext/
H A Dhotplug.c18 const char *online_path = "/sys/devices/system/cpu/cpu1/online";
25 static void toggle_online_status(bool online) in toggle_online_status() argument
27 long val = online ? 1 : 0; in toggle_online_status()
33 online ? "online" : "offline", strerror(errno)); in toggle_online_status()
57 /* Testing the offline -> online path, so go offline before starting */ in test_hotplug()
/linux/Documentation/filesystems/xfs/
H A Dxfs-online-fsck-design.rst18 XFS Online Fsck Design
21 This document captures the design of the online filesystem check feature for
25 - To help kernel distributors understand exactly what the XFS online fsck
34 As the online fsck code is merged, the links in this document to topic branches
42 Parts 2 and 3 present a high level overview of how online fsck process works
49 might be built atop online fsck.
112 Each kernel patchset adding an online repair function will use the same branch
118 The online fsck tool described here will be the third tool in the history of
162 while the filesystem is online.
188 | The userspace driver program for the new online fsc
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/linux/Documentation/ABI/testing/
H A Dsysfs-devices-memory47 is read-write. When read, it returns the online/offline
49 the online/offline state of a memory block using the following
52 # echo online > /sys/devices/system/memory/memoryX/state
60 reading the file will return "online"; the zone information
77 For online memory blocks, it returns in which zone memory
85 the state of an offline memory block to "online". Only one of
H A Dsysfs-devices-system-xen_cpu12 What: /sys/devices/system/xen_cpu/xen_cpu#/online
16 Interface to online/offline Xen physical cpus
19 to online/offline physical cpus, except cpu0 due to several
/linux/mm/
H A Dmemory_hotplug.c158 * memory_hotplug.online_policy: configure online behavior when onlining without
162 * "auto-movable": online memory to ZONE_MOVABLE if the configuration
172 "Set the online policy (\"contig-zones\", \"auto-movable\") "
179 * online some memory to ZONE_MOVABLE -- e.g., because hotplugged KERNEL memory
186 "in percent for \"auto-movable\" online policy. Default: 301");
196 "\"auto-movable\" online policy. Default: true");
326 * memory that will be marked online, so this check should only in check_pfn_span()
342 * Return page for the valid pfn only if the page is online. All pfn
376 * get_dev_pagemap() can determine sub-section online status. in pfn_to_online_page()
664 * Online th in online_pages_range()
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/linux/tools/perf/arch/arm/util/
H A Dpmu.c21 struct perf_cpu_map *intersect, *online = cpu_map__online(); in perf_pmu__arch_init() local
43 /* Workaround some ARM PMU's failing to correctly set CPU maps for online processors. */ in perf_pmu__arch_init()
44 intersect = perf_cpu_map__intersect(online, pmu->cpus); in perf_pmu__arch_init()
45 perf_cpu_map__put(online); in perf_pmu__arch_init()
/linux/arch/s390/include/asm/
H A Dphysmem_info.h55 struct physmem_range online[MEM_INLINED_ENTRIES]; member
73 *start = (unsigned long)physmem_info.online[n].start; in __get_physmem_range()
74 *end = (unsigned long)physmem_info.online[n].end; in __get_physmem_range()
90 * for_each_physmem_usable_range - early online memory range iterator
95 * Walks over detected online memory ranges below usable limit.
100 /* Walks over all detected online memory ranges disregarding usable limit. */
/linux/Documentation/driver-api/cxl/linux/
H A Dmemory-hotplug.rst12 1) Default Online Behavior (on/off and zone)
17 Default Online Behavior
19 The default-online behavior of hotplug memory is dictated by the following,
29 2) Online in :code:`ZONE_NORMAL`
30 3) Online in :code:`ZONE_MOVABLE`
/linux/kernel/irq/
H A Dmatrix.c17 bool online; member
81 * irq_matrix_online - Bring the local CPU matrix online
88 BUG_ON(cm->online); in irq_matrix_online()
96 cm->online = true; in irq_matrix_online()
111 cm->online = false; in irq_matrix_offline()
146 if (!cm->online || cm->available <= maxavl) in matrix_find_best_cpu()
167 if (!cm->online || cm->managed_allocated > allocated) in matrix_find_best_cpu_managed()
228 if (cm->online) { in irq_matrix_reserve_managed()
278 if (cm->online) { in irq_matrix_remove_managed()
439 if (cm->online) in irq_matrix_free()
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/linux/Documentation/arch/arm64/
H A Dcpu-hotplug.rst9 CPUs online/offline using PSCI. This document is about ACPI firmware allowing
51 marked as disabled by firmware. Only the CPU's online/offline behaviour is
59 brought online. Firmware can enforce its policy via PSCI's return codes. e.g.
64 ``enabled`` in the MADT GICC structures, but should have the ``online capable``
69 CPUs described as ``online capable`` but not ``enabled`` can be set to enabled
/linux/Documentation/trace/rv/
H A Druntime-verification.rst19 *online* verification of a system, enabling the *reaction* for unexpected
77 Online RV monitors
80 Monitors can be classified as *offline* and *online* monitors. *Offline*
82 reading the trace execution from a permanent storage system. *Online* monitors
83 process the trace during the execution of the system. Online monitors are said
89 file. In contrast, *synchronous online* method can react at the exact moment
97 *synchronous online* monitors will incur on lower overhead.
109 This motivated the development of an in-kernel interface for online monitors.
/linux/arch/mips/kernel/
H A Dpm-cps.c27 * @online: the count of online coupled VPEs
39 typedef unsigned (*cps_nc_entry_fn)(unsigned online, u32 *nc_ready_count);
57 /* Indicates online CPUs coupled with the current CPU */
75 static void coupled_barrier(atomic_t *a, unsigned online) in coupled_barrier() argument
89 while (atomic_read(a) < online) in coupled_barrier()
92 if (atomic_inc_return(a) == online * 2) { in coupled_barrier()
97 while (atomic_read(a) > online) in coupled_barrier()
106 unsigned online, left; in cps_pm_enter_state() local
121 /* Calculate which coupled CPUs (VPEs) are online */ in cps_pm_enter_state()
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