[RFC v2 6/7] Make GRUB a task's flag

Luca Abeni
2016-04-01T15:19:18Z

Signed-off-by: Luca Abeni <luca.abeni@unitn.it>
---
include/uapi/linux/sched.h | 1 +
kernel/sched/core.c | 3 ++-
kernel/sched/deadline.c | 3 ++-
3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/sched.h b/include/uapi/linux/sched.h
index cc89dde..9279562 100644
--- a/include/uapi/linux/sched.h
+++ b/include/uapi/linux/sched.h
@@ -48,5 +48,6 @@
* For the sched_{set,get}attr() calls
*/
#define SCHED_FLAG_RESET_ON_FORK 0x01
+#define SCHED_FLAG_RECLAIM 0x02

#endif /* _UAPI_LINUX_SCHED_H */
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 4158d1f..3224132 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3822,7 +3822,8 @@ recheck:
return -EINVAL;
}

- if (attr->sched_flags & ~(SCHED_FLAG_RESET_ON_FORK))
+ if (attr->sched_flags &
+ ~(SCHED_FLAG_RESET_ON_FORK | SCHED_FLAG_RECLAIM))
return -EINVAL;

/*
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 647d779..b56f76f 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -834,7 +834,8 @@ static void update_curr_dl(struct rq *rq)

sched_rt_avg_update(rq, delta_exec);

- delta_exec = grub_reclaim(delta_exec, rq);
+ if (unlikely(dl_se->flags & SCHED_FLAG_RECLAIM))
+ delta_exec = grub_reclaim(delta_exec, rq);
dl_se->runtime -= delta_exec;

throttle:
--
2.5.0