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| author |   Mathieu Poirier <mathieu.poirier@linaro.org> | 2019-07-19 15:59:55 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2019-07-25 15:55:01 +0200 |
| commit | f9a25f776d780bfa3279f0b6e5f5cf3224997976 (patch) | |
| tree | 8b1fa082ea0a57b11fbee5fc91e208442fcafd0f /include/linux/sched | |
| parent | sched/core: Streamle calls to task_rq_unlock() (diff) | |
| download | linux-dev-f9a25f776d780bfa3279f0b6e5f5cf3224997976.tar.xz linux-dev-f9a25f776d780bfa3279f0b6e5f5cf3224997976.zip | |
cpusets: Rebuild root domain deadline accounting information
When the topology of root domains is modified by CPUset or CPUhotplug
operations information about the current deadline bandwidth held in the
root domain is lost.
This patch addresses the issue by recalculating the lost deadline
bandwidth information by circling through the deadline tasks held in
CPUsets and adding their current load to the root domain they are
associated with.
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
[ Various additional modifications. ]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bristot@redhat.com
Cc: claudio@evidence.eu.com
Cc: lizefan@huawei.com
Cc: longman@redhat.com
Cc: luca.abeni@santannapisa.it
Cc: rostedt@goodmis.org
Cc: tj@kernel.org
Cc: tommaso.cucinotta@santannapisa.it
Link: https://lkml.kernel.org/r/20190719140000.31694-4-juri.lelli@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/sched')
| -rw-r--r-- | include/linux/sched/deadline.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/sched/deadline.h b/include/linux/sched/deadline.h index 0cb034331cbb..1aff00b65f3c 100644 --- a/include/linux/sched/deadline.h +++ b/include/linux/sched/deadline.h @@ -24,3 +24,11 @@ static inline bool dl_time_before(u64 a, u64 b) { return (s64)(a - b) < 0; } + +#ifdef CONFIG_SMP + +struct root_domain; +extern void dl_add_task_root_domain(struct task_struct *p); +extern void dl_clear_root_domain(struct root_domain *rd); + +#endif /* CONFIG_SMP */ |