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| author | Yinghai Lu <yinghai.lu@amd.com> | 2006-12-07 02:14:05 +0100 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-12-07 02:14:05 +0100 |
| commit | 5df0287ecc4f53e68bbd188fa8258b555e6b734f (patch) | |
| tree | 78c390a8527ce17b462c80e4452eb5c72c86974a | |
| parent | 3760dd6efa75c98e223643da2eb7040406433053 (diff) | |
| download | linux-3.10-5df0287ecc4f53e68bbd188fa8258b555e6b734f.tar.gz linux-3.10-5df0287ecc4f53e68bbd188fa8258b555e6b734f.tar.bz2 linux-3.10-5df0287ecc4f53e68bbd188fa8258b555e6b734f.zip | |
[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: Yinghai Lu <yinghai.lu@amd.com>
Signed-off-by: Andi Kleen <ak@suse.de>
| -rw-r--r-- | arch/x86_64/kernel/io_apic.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c index c80081a6ba4..f71461b1f03 100644 --- a/arch/x86_64/kernel/io_apic.c +++ b/arch/x86_64/kernel/io_apic.c @@ -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); } |