apfs/linux-apfs
0
0
Fork 0
mirror of https://github.com/linux-apfs/linux-apfs.git synced 2026-05-01 15:00:59 -07:00
Code Issues Packages Projects Releases Wiki Activity

Add suspend-related notifications for CPU hotplug

Browse Source 
Since nonboot CPUs are now disabled after tasks and devices have been
frozen and the CPU hotplug infrastructure is used for this purpose, we need
special CPU hotplug notifications that will help the CPU-hotplug-aware
subsystems distinguish normal CPU hotplug events from CPU hotplug events
related to a system-wide suspend or resume operation in progress.  This
patch introduces such notifications and causes them to be used during
suspend and resume transitions.  It also changes all of the
CPU-hotplug-aware subsystems to take these notifications into consideration
(for now they are handled in the same way as the corresponding "normal"
ones).

[oleg@tv-sign.ru: cleanups]
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rafael J. Wysocki
2007-05-09 02:35:10 -07:00
committed by Linus Torvalds
parent f37bc2712b
commit 8bb7844286
47 changed files with 152 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/cpu-hotplug.txt
+7 -2
View File
@@ -217,14 +217,17 @@ Q: What happens when a CPU is being logically offlined?
A: The following happen, listed in no particular order :-)
- A notification is sent to in-kernel registered modules by sending an event
CPU_DOWN_PREPARE
CPU_DOWN_PREPARE or CPU_DOWN_PREPARE_FROZEN, depending on whether or not the
CPU is being offlined while tasks are frozen due to a suspend operation in
progress
- All process is migrated away from this outgoing CPU to a new CPU
- All interrupts targeted to this CPU is migrated to a new CPU
- timers/bottom half/task lets are also migrated to a new CPU
- Once all services are migrated, kernel calls an arch specific routine
__cpu_disable() to perform arch specific cleanup.
- Once this is successful, an event for successful cleanup is sent by an event
CPU_DEAD.
CPU_DEAD (or CPU_DEAD_FROZEN if tasks are frozen due to a suspend while the
CPU is being offlined).
"It is expected that each service cleans up when the CPU_DOWN_PREPARE
notifier is called, when CPU_DEAD is called its expected there is nothing
@@ -242,9 +245,11 @@ A: This is what you would need in your kernel code to receive notifications.
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
foobar_online_action(cpu);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
foobar_dead_action(cpu);
break;
}
arch/i386/kernel/cpu/intel_cacheinfo.c
+2
View File
@@ -733,9 +733,11 @@ static int __cpuinit cacheinfo_cpu_callback(struct notifier_block *nfb,
sys_dev = get_cpu_sysdev(cpu);
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
cache_add_dev(sys_dev);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
cache_remove_dev(sys_dev);
break;
}
arch/i386/kernel/cpu/mcheck/therm_throt.c
+2
View File
@@ -137,10 +137,12 @@ static __cpuinit int thermal_throttle_cpu_callback(struct notifier_block *nfb,
mutex_lock(&therm_cpu_lock);
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
err = thermal_throttle_add_dev(sys_dev);
WARN_ON(err);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
thermal_throttle_remove_dev(sys_dev);
break;
}
arch/i386/kernel/cpuid.c
+2
View File
@@ -169,9 +169,11 @@ static int cpuid_class_cpu_callback(struct notifier_block *nfb, unsigned long ac
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
cpuid_device_create(cpu);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
device_destroy(cpuid_class, MKDEV(CPUID_MAJOR, cpu));
break;
}
arch/i386/kernel/microcode.c
+3
View File
@@ -775,10 +775,13 @@ mc_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu)
sys_dev = get_cpu_sysdev(cpu);
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
case CPU_DOWN_FAILED:
case CPU_DOWN_FAILED_FROZEN:
mc_sysdev_add(sys_dev);
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
mc_sysdev_remove(sys_dev);
break;
}
arch/i386/kernel/msr.c
+2
View File
@@ -153,9 +153,11 @@ static int msr_class_cpu_callback(struct notifier_block *nfb,
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
msr_device_create(cpu);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
device_destroy(msr_class, MKDEV(MSR_MAJOR, cpu));
break;
}
arch/ia64/kernel/err_inject.c
+2
View File
@@ -236,9 +236,11 @@ static int __cpuinit err_inject_cpu_callback(struct notifier_block *nfb,
sys_dev = get_cpu_sysdev(cpu);
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
err_inject_add_dev(sys_dev);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
err_inject_remove_dev(sys_dev);
break;
}
arch/ia64/kernel/palinfo.c
+2
View File
@@ -975,9 +975,11 @@ static int palinfo_cpu_callback(struct notifier_block *nfb,
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
create_palinfo_proc_entries(hotcpu);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
remove_palinfo_proc_entries(hotcpu);
break;
}
arch/ia64/kernel/salinfo.c
+2
View File
@@ -582,6 +582,7 @@ salinfo_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu
struct salinfo_data *data;
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
spin_lock_irqsave(&data_saved_lock, flags);
for (i = 0, data = salinfo_data;
i < ARRAY_SIZE(salinfo_data);
@@ -592,6 +593,7 @@ salinfo_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu
spin_unlock_irqrestore(&data_saved_lock, flags);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
spin_lock_irqsave(&data_saved_lock, flags);
for (i = 0, data = salinfo_data;
i < ARRAY_SIZE(salinfo_data);
arch/ia64/kernel/topology.c
+2
View File
@@ -412,9 +412,11 @@ static int __cpuinit cache_cpu_callback(struct notifier_block *nfb,
sys_dev = get_cpu_sysdev(cpu);
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
cache_add_dev(sys_dev);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
cache_remove_dev(sys_dev);
break;
}
arch/powerpc/kernel/sysfs.c
+2
View File
@@ -342,10 +342,12 @@ static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
register_cpu_online(cpu);
break;
#ifdef CONFIG_HOTPLUG_CPU
case CPU_DEAD:
case CPU_DEAD_FROZEN:
unregister_cpu_online(cpu);
break;
#endif
arch/powerpc/mm/numa.c
+3
View File
@@ -252,12 +252,15 @@ static int __cpuinit cpu_numa_callback(struct notifier_block *nfb,
switch (action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
numa_setup_cpu(lcpu);
ret = NOTIFY_OK;
break;
#ifdef CONFIG_HOTPLUG_CPU
case CPU_DEAD:
case CPU_DEAD_FROZEN:
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
unmap_cpu_from_node(lcpu);
break;
ret = NOTIFY_OK;
arch/s390/appldata/appldata_base.c
+2
View File
@@ -567,9 +567,11 @@ appldata_cpu_notify(struct notifier_block *self,
{
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
appldata_online_cpu((long) hcpu);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
appldata_offline_cpu((long) hcpu);
break;
default:
arch/s390/kernel/smp.c
+2
View File
@@ -789,10 +789,12 @@ static int __cpuinit smp_cpu_notify(struct notifier_block *self,
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
if (sysdev_create_file(s, &attr_capability))
return NOTIFY_BAD;
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
sysdev_remove_file(s, &attr_capability);
break;
}
arch/x86_64/kernel/mce.c
+2
View File
@@ -720,9 +720,11 @@ mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
mce_create_device(cpu);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
mce_remove_device(cpu);
break;
}
arch/x86_64/kernel/mce_amd.c
+2
View File
@@ -654,9 +654,11 @@ static int threshold_cpu_callback(struct notifier_block *nfb,
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
threshold_create_device(cpu);
break;
case CPU_DEAD:
case CPU_DEAD_FROZEN:
threshold_remove_device(cpu);
break;
default:
arch/x86_64/kernel/vsyscall.c
+1 -1
View File
@@ -327,7 +327,7 @@ static int __cpuinit
cpu_vsyscall_notifier(struct notifier_block *n, unsigned long action, void *arg)
{
long cpu = (long)arg;
if (action == CPU_ONLINE)
if (action == CPU_ONLINE || action == CPU_ONLINE_FROZEN)
smp_call_function_single(cpu, cpu_vsyscall_init, NULL, 0, 1);
return NOTIFY_DONE;
}
block/ll_rw_blk.c
+1 -1
View File
@@ -3507,7 +3507,7 @@ static int blk_cpu_notify(struct notifier_block *self, unsigned long action,
* If a CPU goes away, splice its entries to the current CPU
* and trigger a run of the softirq
*/
if (action == CPU_DEAD) {
if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) {
int cpu = (unsigned long) hcpu;
local_irq_disable();
drivers/base/topology.c
+3
View File
@@ -126,10 +126,13 @@ static int __cpuinit topology_cpu_callback(struct notifier_block *nfb,
switch (action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
rc = topology_add_dev(cpu);
break;
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
case CPU_DEAD:
case CPU_DEAD_FROZEN:
topology_remove_dev(cpu);
break;
}
drivers/cpufreq/cpufreq.c
+3
View File
@@ -1685,9 +1685,11 @@ static int cpufreq_cpu_callback(struct notifier_block *nfb,
if (sys_dev) {
switch (action) {
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
cpufreq_add_dev(sys_dev);
break;
case CPU_DOWN_PREPARE:
case CPU_DOWN_PREPARE_FROZEN:
if (unlikely(lock_policy_rwsem_write(cpu)))
BUG();
@@ -1699,6 +1701,7 @@ static int cpufreq_cpu_callback(struct notifier_block *nfb,
__cpufreq_remove_dev(sys_dev);
break;
case CPU_DOWN_FAILED:
case CPU_DOWN_FAILED_FROZEN:
cpufreq_add_dev(sys_dev);
break;
}

Some files were not shown because too many files have changed in this diff Show More