Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5df0287e authored by Yinghai Lu's avatar Yinghai Lu Committed by Andi Kleen
Browse files

[PATCH] x86-64: Extend clear_irq_vector 



Clear the irq releated entries in irq_vector, irq_domain and vector_irq
instead of clearing irq_vector only. So when new irq is created, it
could reuse that vector. (actually is the second loop scanning from
FIRST_DEVICE_VECTOR+8). This could avoid the vectors are used up
with enough module inserting and removing

Cc: Eric W. Biedierman <ebiederm@xmission.com>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-By: default avatarYinghai Lu <yinghai.lu@amd.com>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
parent 3760dd6e

arch/x86_64/kernel/io_apic.c

+17 −1
Original line number Diff line number Diff line
@@ -750,6 +750,22 @@ static int assign_irq_vector(int irq, cpumask_t mask, cpumask_t *result) 
	return vector;

}



static void __clear_irq_vector(int irq)

{

	cpumask_t mask;

	int cpu, vector;



	BUG_ON(!irq_vector[irq]);



	vector = irq_vector[irq];

	cpus_and(mask, irq_domain[irq], cpu_online_map);

	for_each_cpu_mask(cpu, mask)

		per_cpu(vector_irq, cpu)[vector] = -1;



	irq_vector[irq] = 0;

	irq_domain[irq] = CPU_MASK_NONE;

}



void __setup_vector_irq(int cpu)

{

	/* Initialize vector_irq on a new cpu */
@@ -1837,7 +1853,7 @@ void destroy_irq(unsigned int irq) 
	dynamic_irq_cleanup(irq);



	spin_lock_irqsave(&vector_lock, flags);

	irq_vector[irq] = 0;

	__clear_irq_vector(irq);

	spin_unlock_irqrestore(&vector_lock, flags);

}