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authorMarcelo Tosatti <mtosatti@redhat.com>2015-03-23 20:21:51 -0300
committerMarcelo Tosatti <mtosatti@redhat.com>2015-03-23 20:22:48 -0300
commit0a4e6be9ca17c54817cf814b4b5aa60478c6df27 (patch)
tree461ed6cace26da5c75d1c01982fde2f3ccc5d4fa /include/linux/sched.h
parent58d2930f4ee335ab703d768cb0318331fc1bb62c (diff)
x86: kvm: Revert "remove sched notifier for cross-cpu migrations"
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> CC: stable@kernel.org # 3.11+
Diffstat (limited to 'include/linux/sched.h')
-rw-r--r--include/linux/sched.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 6d77432e14ff..be98910cc1e2 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);