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Subject[PATCH 1/7] genirq: allow assigning affinity to present but not online CPUs
Date
This will allow us to spread MSI/MSI-X affinity over all present CPUs and
thus better deal with systems where cpus are take on and offline all the
time.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
kernel/irq/manage.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 070be980c37a..5c25d4a5dc46 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -361,17 +361,17 @@ static int setup_affinity(struct irq_desc *desc, struct cpumask *mask)
if (irqd_affinity_is_managed(&desc->irq_data) ||
irqd_has_set(&desc->irq_data, IRQD_AFFINITY_SET)) {
if (cpumask_intersects(desc->irq_common_data.affinity,
- cpu_online_mask))
+ cpu_present_mask))
set = desc->irq_common_data.affinity;
else
irqd_clear(&desc->irq_data, IRQD_AFFINITY_SET);
}

- cpumask_and(mask, cpu_online_mask, set);
+ cpumask_and(mask, cpu_present_mask, set);
if (node != NUMA_NO_NODE) {
const struct cpumask *nodemask = cpumask_of_node(node);

- /* make sure at least one of the cpus in nodemask is online */
+ /* make sure at least one of the cpus in nodemask is present */
if (cpumask_intersects(mask, nodemask))
cpumask_and(mask, mask, nodemask);
}
--
2.11.0
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