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| author |   Luca Abeni <luca.abeni@santannapisa.it> | 2017-05-18 22:13:33 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2017-06-08 10:31:52 +0200 |
| commit | 2d4283e9d583a3ee8cfb1cbb9c1270614df4c29d (patch) | |
| tree | 96171d9010349959766d7339896369c90d9a3544 /kernel/sched | |
| parent | sched/deadline: Do not reclaim the whole CPU bandwidth (diff) | |
| download | wireguard-linux-2d4283e9d583a3ee8cfb1cbb9c1270614df4c29d.tar.xz wireguard-linux-2d4283e9d583a3ee8cfb1cbb9c1270614df4c29d.zip | |
sched/deadline: Make GRUB a task's flag
This patch introduces the SCHED_FLAG_RECLAIM flag to specify
that a DL task is allowed to reclaim unused CPU time (using
the GRUB algorithm).
Tested-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Signed-off-by: Luca Abeni <luca.abeni@santannapisa.it>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Claudio Scordino <claudio@evidence.eu.com>
Cc: Joel Fernandes <joelaf@google.com>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tommaso Cucinotta <tommaso.cucinotta@sssup.it>
Link: http://lkml.kernel.org/r/1495138417-6203-7-git-send-email-luca.abeni@santannapisa.it
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 3 | ||||
| -rw-r--r-- | kernel/sched/deadline.c | 3 |
2 files changed, 4 insertions, 2 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 7abd06400a98..8d1a5a625814 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4195,7 +4195,8 @@ 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 6a0614b9c8d7..61ea3039cdc1 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -985,7 +985,8 @@ 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: |