[Devel] [PATCH RH9] irq/proc: add cond_resched to show_interrupts

[Pavel Tikhomirov]

This should decrease the possibility to trigger soft-lockup in
show_interrupts(). E.g. in case waiting for irq_desc->lock spinlock adds
up across several iterations over irqs to more than 2*watchdog_thresh.

https://pmc.acronis.work/browse/VSTOR-88194

Signed-off-by: Pavel Tikhomirov <ptikhomirov at virtuozzo.com>
---
 kernel/irq/proc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 623b8136e9af..7b4c8ff02e57 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -533,6 +533,8 @@ int show_interrupts(struct seq_file *p, void *v)
 	raw_spin_unlock_irqrestore(&desc->lock, flags);
 outsparse:
 	rcu_read_unlock();
+
+	cond_resched();
 	return 0;
 }
 #endif
-- 
2.45.2