[RFC v3 6/6] Make GRUB a task's flag

From: Luca Abeni
Date: Mon Oct 24 2016 - 10:07:33 EST


Signed-off-by: Luca Abeni <luca.abeni@xxxxxxxx>
---
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 5f0fe01..e2a6c7b 100644
--- a/include/uapi/linux/sched.h
+++ b/include/uapi/linux/sched.h
@@ -47,5 +47,6 @@
* 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 6706b5f..421a315 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4087,7 +4087,8 @@ static int __sched_setscheduler(struct task_struct *p,
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 cab76e8..8c4c0e0 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -830,7 +830,8 @@ 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:
--
2.7.4