diff options
| author | Dima Zavin <dima@android.com> | 2010-09-28 17:24:51 -0700 |
|---|---|---|
| committer | Colin Cross <ccross@android.com> | 2010-10-04 12:08:04 -0700 |
| commit | cbb658990449df002eb9775f0b5ad104a7114b5f (patch) | |
| tree | 4030eccaa8635fe2043f9c15c584b8e140955a24 /include | |
| parent | 3cfc28bd7cdb071d4c6b27c7a6aa84023ac211b6 (diff) | |
sched: normalize sleeper's vruntime during group change
If you switch the cgroup of a sleeping thread, its vruntime does
not get adjusted correctly for the difference between the
min_vruntime values of the two groups.
This patch adds a new callback, prep_move_task, to struct sched_class
to give sched_fair the opportunity to adjust the task's vruntime
just before setting its new group. This allows us to properly normalize
a sleeping task's vruntime when moving it between different cgroups.
More details about the problem:
http://lkml.org/lkml/2010/9/28/24
Cc: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Dima Zavin <dima@android.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sched.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index cc9c126397fd..6e3dd4fef93c 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1073,6 +1073,7 @@ struct sched_class { #ifdef CONFIG_FAIR_GROUP_SCHED void (*moved_group) (struct task_struct *p, int on_rq); + void (*prep_move_group) (struct task_struct *p, int on_rq); #endif }; |