diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2015-03-23 20:21:51 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-06 22:03:36 +0200 |
| commit | 3fbb83fdcd2be33c3091f2c1094c37b5054da9f8 (patch) | |
| tree | fd5e79a8ac235c4abdc04327db076fd93425bb14 /include | |
| parent | bbe33d7992b2dd4a79499aeb384a4597b73451eb (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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -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 a419b65770d6..51348f77e431 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -176,6 +176,14 @@ extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load); 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); |