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Groups > linux.kernel > #1607858

[RFC v5 6/9] sched/deadline: make GRUB a task's flag

From luca abeni <luca.abeni@santannapisa.it>
Newsgroups linux.kernel
Subject [RFC v5 6/9] sched/deadline: make GRUB a task's flag
Date 2017-03-23 21:00 +0100
Message-ID <toh3Q-72e-21@gated-at.bofh.it> (permalink)
References <toh3P-72e-5@gated-at.bofh.it>
Organization linux.* mail to news gateway

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From: Luca Abeni <luca.abeni@santannapisa.it>

Signed-off-by: Luca Abeni <luca.abeni@santannapisa.it>
Tested-by: Daniel Bristot de Oliveira <bristot@redhat.com>
---
 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 efa88eb..88e108b 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4140,7 +4140,8 @@ 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 e964051..1951379 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -921,7 +921,8 @@ 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

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Thread

[RFC v5 0/9] CPU reclaiming for SCHED_DEADLINE  luca abeni <luca.abeni@santannapisa.it> - 2017-03-23 21:00 +0100
  [RFC v5 8/9] sched/deadline: base GRUB reclaiming on the inactive utilization luca abeni <luca.abeni@santannapisa.it> - 2017-03-23 21:00 +0100
    Re: [RFC v5 8/9] sched/deadline: base GRUB reclaiming on the  inactive utilization Peter Zijlstra <peterz@infradead.org> - 2017-03-27 16:30 +0200
      Re: [RFC v5 8/9] sched/deadline: base GRUB reclaiming on the  inactive utilization Luca Abeni <luca.abeni@santannapisa.it> - 2017-03-27 17:00 +0200
        Re: [RFC v5 8/9] sched/deadline: base GRUB reclaiming on the  inactive utilization Peter Zijlstra <peterz@infradead.org> - 2017-03-27 18:20 +0200
          Re: [RFC v5 8/9] sched/deadline: base GRUB reclaiming on the  inactive utilization luca abeni <luca.abeni@santannapisa.it> - 2017-03-27 19:10 +0200
  [RFC v5 2/9] sched/deadline: improve the tracking of active utilization luca abeni <luca.abeni@santannapisa.it> - 2017-03-23 21:00 +0100
    Re: [RFC v5 2/9] sched/deadline: improve the tracking of active  utilization Peter Zijlstra <peterz@infradead.org> - 2017-03-24 14:30 +0100
    Re: [RFC v5 2/9] sched/deadline: improve the tracking of active  utilization Peter Zijlstra <peterz@infradead.org> - 2017-03-24 14:30 +0100
      Re: [RFC v5 2/9] sched/deadline: improve the tracking of active  utilization luca abeni <luca.abeni@santannapisa.it> - 2017-03-24 22:50 +0100
        Re: [RFC v5 2/9] sched/deadline: improve the tracking of active  utilization Steven Rostedt <rostedt@goodmis.org> - 2017-03-25 03:40 +0100
          Re: [RFC v5 2/9] sched/deadline: improve the tracking of active  utilization Luca Abeni <luca.abeni@santannapisa.it> - 2017-03-27 10:30 +0200
            Re: [RFC v5 2/9] sched/deadline: improve the tracking of active utilization Claudio Scordino <claudio@evidence.eu.com> - 2017-03-27 11:00 +0200
        Re: [RFC v5 2/9] sched/deadline: improve the tracking of active  utilization Juri Lelli <juri.lelli@arm.com> - 2017-03-27 09:20 +0200
          Re: [RFC v5 2/9] sched/deadline: improve the tracking of active  utilization Luca Abeni <luca.abeni@santannapisa.it> - 2017-03-27 10:10 +0200
            Re: [RFC v5 2/9] sched/deadline: improve the tracking of active  utilization Juri Lelli <juri.lelli@arm.com> - 2017-03-27 10:50 +0200
        Re: [RFC v5 2/9] sched/deadline: improve the tracking of active  utilization Luca Abeni <luca.abeni@santannapisa.it> - 2017-03-27 09:40 +0200
    Re: [RFC v5 2/9] sched/deadline: improve the tracking of active utilization Mathieu Poirier <mathieu.poirier@linaro.org> - 2017-03-26 19:40 +0200
      Re: [RFC v5 2/9] sched/deadline: improve the tracking of active  utilization luca abeni <luca.abeni@santannapisa.it> - 2017-03-26 23:10 +0200
  [RFC v5 6/9] sched/deadline: make GRUB a task's flag luca abeni <luca.abeni@santannapisa.it> - 2017-03-23 21:00 +0100
  [RFC v5 7/9] sched/deadline: track the "total rq utilization" too luca abeni <luca.abeni@santannapisa.it> - 2017-03-23 21:00 +0100
  [RFC v5 4/9] sched/deadline: implement GRUB accounting luca abeni <luca.abeni@santannapisa.it> - 2017-03-23 21:00 +0100
  [RFC v5 3/9] sched/deadline: fix the update of the total -deadline utilization luca abeni <luca.abeni@santannapisa.it> - 2017-03-23 21:00 +0100

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