diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2015-03-23 20:21:51 -0300 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2015-05-05 11:09:30 +0100 |
| commit | 4d552c7917b10965817ed60d9fca16d300637382 (patch) | |
| tree | 78f220d1ea369ce9c0b6e8d03cffac809f793c6b /include/linux | |
| parent | d84753e0d715f04e3985b0e51db3fe62d818b941 (diff) | |
x86: kvm: Revert "remove sched notifier for cross-cpu migrations"
commit 0a4e6be9ca17c54817cf814b4b5aa60478c6df27 upstream.
The following point:
2. per-CPU pvclock time info is updated if the
underlying CPU changes.
Is not true anymore since "KVM: x86: update pvclock area conditionally,
on cpu migration".
Add task migration notification back.
Problem noticed by Andy Lutomirski.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/sched.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index c5cc872b351d..4bab946551e9 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -174,6 +174,14 @@ extern unsigned long this_cpu_load(void); extern void calc_global_load(unsigned long ticks); extern void update_cpu_load_nohz(void); +/* Notifier for when a task gets migrated to a new CPU */ +struct task_migration_notifier { + struct task_struct *task; + int from_cpu; + int to_cpu; +}; +extern void register_task_migration_notifier(struct notifier_block *n); + extern unsigned long get_parent_ip(unsigned long addr); extern void dump_cpu_task(int cpu); |