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/Linux-v5.15/Documentation/ABI/testing/
Dsysfs-devices-online6 devices whose bus types provide .online() and .offline()
8 of the device's 'offline' field. If that number is 1 and '0'
10 .offline() callback is executed for the device and (if
11 successful) its 'offline' field is updated accordingly. In
14 for the device and (if successful) its 'offline' field is
17 After a successful execution of the bus type's .offline()
Dsysfs-memory-page-offline6 Soft-offline the memory page containing the physical address
9 to soft-offline it, by moving the contents elsewhere or
19 fail the offline. Return value is the size of the
28 Hard-offline the memory page containing the physical
31 kernel will then attempt to hard-offline the page, by
Dusb-uevent7 contain ACTION=offline and ERROR=DEAD.
11 KERNEL[130.428945] offline /devices/pci0000:00/0000:00:10.0/usb2 (usb)
12 ACTION=offline
Dsysfs-devices-system-xen_cpu16 Interface to online/offline Xen physical cpus
19 to online/offline physical cpus, except cpu0 due to several
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
53 # echo offline > /sys/devices/system/memory/memoryX/state
82 For offline memory blocks, it returns by which zone memory
85 the state of an offline memory block to "online". Only one of
Dsysfs-class-remoteproc19 - "offline"
25 "offline" means the remote processor is powered off.
50 return it to the "offline" state.
/Linux-v5.15/drivers/base/
Dcontainer.c24 return cdev->offline ? cdev->offline(cdev) : 0; in container_offline()
31 .offline = container_offline,
Dcpu.c134 .offline = cpu_subsys_offline,
242 cpumask_var_t offline; in print_cpus_offline() local
245 if (!alloc_cpumask_var(&offline, GFP_KERNEL)) in print_cpus_offline()
247 cpumask_andnot(offline, cpu_possible_mask, cpu_online_mask); in print_cpus_offline()
248 len += sysfs_emit_at(buf, len, "%*pbl", cpumask_pr_args(offline)); in print_cpus_offline()
249 free_cpumask_var(offline); in print_cpus_offline()
266 static DEVICE_ATTR(offline, 0444, print_cpus_offline, NULL);
369 cpu->dev.offline = !cpu_online(num); in register_cpu()
/Linux-v5.15/tools/testing/selftests/memory-hotplug/
Dmem-on-off-test.sh53 hotpluggable_memory offline
68 grep -q offline $SYSFS/devices/system/memory/memory$1/state
78 echo offline > $SYSFS/devices/system/memory/memory$1/state
89 echo $FUNCNAME $memory: unexpected offline >&2
117 echo $FUNCNAME $memory: unexpected offline >&2
131 echo $FUNCNAME $memory: unexpected offline >&2
/Linux-v5.15/drivers/thunderbolt/
Dusb4_port.c83 return sysfs_emit(buf, "%d\n", usb4->offline); in offline_show()
106 if (val == usb4->offline) in offline_store()
124 usb4->offline = val; in offline_store()
135 static DEVICE_ATTR_RW(offline);
161 if (!usb4->offline) { in rescan_store()
279 return usb4->offline ? usb4_port_offline(usb4) : 0; in usb4_port_device_resume()
/Linux-v5.15/tools/testing/selftests/cpu-hotplug/
Dcpu-on-off-test.sh46 offline_cpus=`cat $SYSFS/devices/system/cpu/offline`
107 echo $FUNCNAME $cpu: unexpected offline >&2
133 echo $FUNCNAME $cpu: unexpected offline >&2
146 echo $FUNCNAME $cpu: unexpected offline >&2
/Linux-v5.15/mm/kasan/
Dquarantine.c37 bool offline; member
196 if (q->offline) { in kasan_quarantine_put()
345 this_cpu_ptr(&cpu_quarantine)->offline = false; in kasan_cpu_online()
358 WRITE_ONCE(q->offline, true); in kasan_cpu_offline()
/Linux-v5.15/Documentation/admin-guide/
Dcputopology.rst60 offline: CPUs that are not online because they have been
83 offline: 2,4-31,32-63
90 was manually taken offline (and is the only CPU that can be brought
94 offline: 2,4-127,128-143
Dkernel-per-CPU-kthreads.rst24 writing "0" to offline and "1" to online.
99 the CPU offline, then bring it back online. This forces
101 with multiple CPUs, force them all offline before bringing the
103 do not offline any other CPUs, because doing so could force the
115 be de-jittered. (It is OK to force this CPU offline and then
127 be de-jittered. (It is OK to force this CPU offline and then
139 be de-jittered. (It is OK to force this CPU offline and then
184 CPU offline, then bring it back online. This forces recurring
186 CPUs, force them all offline before bringing the first one
188 offline any other CPUs, because doing so could force the timer
/Linux-v5.15/Documentation/translations/zh_CN/core-api/
Dcpu_hotplug.rst110 -r--r--r-- 1 root root 4.0K Dec 21 16:33 offline
115 文件 *offline* 、 *online* 、*possible* 、*present* 代表CPU掩码。每个CPU文件
119 smpboot: CPU 4 is now offline
331 if [ "${ACTION}" = "offline" ]
333 echo "CPU ${DEVPATH##*/} offline"
/Linux-v5.15/Documentation/core-api/
Dcpu_hotplug.rst111 -r--r--r-- 1 root root 4.0K Dec 21 16:33 offline
116 The files *offline*, *online*, *possible*, *present* represent the CPU masks.
121 smpboot: CPU 4 is now offline
136 * Resume from hibernate/suspend. Hibernate/suspend will fail if CPU0 is offline.
145 The offline case
184 operations (CPU online or CPU offline) then the other not-required callback
196 after the CPU has become dysfunctional during a CPU offline operation.
221 on the hotplugged CPU during a CPU offline operation shortly before the
236 hotplugged CPU during a CPU offline operation.
245 CPU online/offline operations
[all …]
Dmemory-hotplug.rst34 the memory block that we attempted to offline.
64 - start_pfn is start_pfn of online/offline memory.
65 - nr_pages is # of pages of online/offline memory.
95 - synchronize against online/offline requests (e.g. via sysfs). This way, memory
/Linux-v5.15/Documentation/fault-injection/
Dnotifier-error-inject.rst44 Example: Inject memory hotplug offline error (-12 == -ENOMEM)::
48 # echo offline > /sys/devices/system/memory/memoryXXX/state
97 These scripts first do simple online and offline tests and then do fault
/Linux-v5.15/drivers/bus/
Dmips_cdmm.c270 bool offline; member
381 if (bus->offline) { in mips_cdmm_setup()
389 bus->offline = false; in mips_cdmm_setup()
634 bus->offline = true; in BUILD_PERDEV_HELPER()
662 bus->offline = false; in mips_cdmm_cpu_online()
/Linux-v5.15/Documentation/filesystems/
Dzonefs.rst190 * A zone may transition to the offline condition (BLK_ZONE_COND_OFFLINE):
191 An offline zone cannot be read nor written. No user action can transition an
192 offline zone back to an operational good state. Similarly to zone read-only
193 transitions, the reasons for a drive to transition a zone to the offline
228 * A zone condition change to read-only or offline also always triggers zonefs
252 file attributes and data modification. For offline zones, all permissions
268 | (default) | offline | 0 no no no no |
272 | | offline | 0 no no no no |
275 | zone-offline | read-only | 0 no no yes no |
276 | | offline | 0 no no no no |
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/Linux-v5.15/net/sunrpc/
Dsysfs.c160 closing, congested, cwnd_wait, write_space, offline, remove; in rpc_sysfs_xprt_state_show() local
178 offline = test_bit(XPRT_OFFLINE, &xprt->state); in rpc_sysfs_xprt_state_show()
192 offline ? "OFFLINE" : "", in rpc_sysfs_xprt_state_show()
282 int offline = 0, online = 0, remove = 0; in rpc_sysfs_xprt_state_change() local
289 offline = 1; in rpc_sysfs_xprt_state_change()
305 if (offline) { in rpc_sysfs_xprt_state_change()
/Linux-v5.15/Documentation/admin-guide/mm/
Dmemory-hotplug.rst172 One can explicitly request to associate an offline memory block with
189 If this feature is disabled, the memory blocks will stay offline until
211 DLPAR on ppc64 ignores the ``offline`` setting and will still online added
231 % echo offline > /sys/devices/system/memory/memoryXXX/state
237 If offlining succeeds, the state of the memory block is changed to be "offline".
250 The state (online/offline/going-offline) of a memory block can be observed
343 When writing, ``online``, ``offline``, ``online_kernel`` and
351 When reading, ``online``, ``offline`` and ``going-offline``
355 belongs to; when a block is offline, shows what zone will
365 For offline memory blocks, the first column shows the
[all …]
/Linux-v5.15/include/linux/
Dcontainer.h19 int (*offline)(struct container_dev *cdev); member
/Linux-v5.15/drivers/staging/fieldbus/Documentation/ABI/
Dsysfs-class-fieldbus-dev44 Whether the fieldbus is online or offline.
47 '0' meaning 'offline'
/Linux-v5.15/Documentation/admin-guide/cgroup-v1/
Dhugetlb.rst117 4. Caveats with HugeTLB cgroup offline.
119 When a HugeTLB cgroup goes offline with some reservations or faults still
123 - the reservation charges remain on the offline HugeTLB cgroup.
131 harder to reparent reservations at offline time.

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