diff options
| author | Christoph Hellwig <hch@lst.de> | 2016-11-09 02:15:02 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-11-09 08:25:08 +0100 |
| commit | 212bd846223c718b6577d4df16fd8d05a55ad914 (patch) | |
| tree | 3dec4e4929b02753ffba2018ea8849eb8cd29f11 /kernel/irq | |
| parent | genirq/affinity: Introduce struct irq_affinity (diff) | |
| download | linux-212bd846223c718b6577d4df16fd8d05a55ad914.tar.xz linux-212bd846223c718b6577d4df16fd8d05a55ad914.zip | |
genirq/affinity: Handle pre/post vectors in irq_calc_affinity_vectors()
Only calculate the affinity for the main I/O vectors, and skip the pre or
post vectors specified by struct irq_affinity.
Also remove the irq_affinity cpumask argument that has never been used. If
we ever need it in the future we can pass it through struct irq_affinity.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Acked-by: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Link: http://lkml.kernel.org/r/1478654107-7384-3-git-send-email-hch@lst.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/affinity.c | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index 17f51d63da56..8d9259727cb4 100644 --- a/kernel/irq/affinity.c +++ b/kernel/irq/affinity.c @@ -131,24 +131,20 @@ out: } /** - * irq_calc_affinity_vectors - Calculate to optimal number of vectors for a given affinity mask - * @affinity: The affinity mask to spread. If NULL cpu_online_mask - * is used - * @maxvec: The maximum number of vectors available + * irq_calc_affinity_vectors - Calculate the optimal number of vectors + * @maxvec: The maximum number of vectors available + * @affd: Description of the affinity requirements */ -int irq_calc_affinity_vectors(const struct cpumask *affinity, int maxvec) +int irq_calc_affinity_vectors(int maxvec, const struct irq_affinity *affd) { - int cpus, ret; + int resv = affd->pre_vectors + affd->post_vectors; + int vecs = maxvec - resv; + int cpus; /* Stabilize the cpumasks */ get_online_cpus(); - /* If the supplied affinity mask is NULL, use cpu online mask */ - if (!affinity) - affinity = cpu_online_mask; - - cpus = cpumask_weight(affinity); - ret = (cpus < maxvec) ? cpus : maxvec; - + cpus = cpumask_weight(cpu_online_mask); put_online_cpus(); - return ret; + + return min(cpus, vecs) + resv; } |