[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [RFC PATCH 02/10] sched: rt: save IRQ state during locking
With XEN preemption enabled, scheduler functions can be called with IRQs disabled (for example, at end of IRQ handler), so we should save and restore IRQ state in schedulers code. Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx> --- xen/common/sched/rt.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/xen/common/sched/rt.c b/xen/common/sched/rt.c index c24cd2ac32..e1711a8edc 100644 --- a/xen/common/sched/rt.c +++ b/xen/common/sched/rt.c @@ -1318,7 +1318,8 @@ static void rt_context_saved(const struct scheduler *ops, struct sched_unit *unit) { struct rt_unit *svc = rt_unit(unit); - spinlock_t *lock = unit_schedule_lock_irq(unit); + unsigned long flags; + spinlock_t *lock = unit_schedule_lock_irqsave(unit, &flags); __clear_bit(__RTDS_scheduled, &svc->flags); /* not insert idle unit to runq */ @@ -1335,7 +1336,7 @@ rt_context_saved(const struct scheduler *ops, struct sched_unit *unit) replq_remove(ops, svc); out: - unit_schedule_unlock_irq(lock, unit); + unit_schedule_unlock_irqrestore(lock, flags, unit); } /* @@ -1460,9 +1461,10 @@ static void repl_timer_handler(void *data){ struct list_head *runq = rt_runq(ops); struct list_head *iter, *tmp; struct rt_unit *svc; + unsigned long flags; LIST_HEAD(tmp_replq); - spin_lock_irq(&prv->lock); + spin_lock_irqsave(&prv->lock, flags); now = NOW(); @@ -1525,7 +1527,7 @@ static void repl_timer_handler(void *data){ if ( !list_empty(replq) ) set_timer(&prv->repl_timer, replq_elem(replq->next)->cur_deadline); - spin_unlock_irq(&prv->lock); + spin_unlock_irqrestore(&prv->lock, flags); } static const struct scheduler sched_rtds_def = { -- 2.29.2
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