On 11/07/2016 07:47 PM, Christoph Hellwig wrote:
From: Christogh Hellwig <hch@xxxxxx>
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: Christogh Hellwig <hch@xxxxxx>
---
drivers/pci/msi.c | 4 ++--
include/linux/interrupt.h | 4 ++--
kernel/irq/affinity.c | 46 +++++++++++++++++++++++++---------------------
3 files changed, 29 insertions(+), 25 deletions(-)
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index c58d3c2..1761b8a 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -558,7 +558,7 @@ msi_setup_entry(struct pci_dev *dev, int nvec, bool affinity)
u16 control;
if (affinity) {
- masks = irq_create_affinity_masks(dev->irq_affinity, nvec);
+ masks = irq_create_affinity_masks(nvec, NULL);
if (!masks)
pr_err("Unable to allocate affinity masks, ignoring\n");
}
@@ -697,7 +697,7 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
int ret, i;
if (affinity) {
- masks = irq_create_affinity_masks(dev->irq_affinity, nvec);
+ masks = irq_create_affinity_masks(nvec, NULL);
if (!masks)
pr_err("Unable to allocate affinity masks, ignoring\n");
}
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 092adfb..bca8f1c 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -290,7 +290,7 @@ extern int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m);
extern int
irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify);
-struct cpumask *irq_create_affinity_masks(const struct cpumask *affinity, int nvec);
+struct cpumask *irq_create_affinity_masks(int nvec, const struct irq_affinity *affd);
int irq_calc_affinity_vectors(int maxvec, const struct irq_affinity *affd);
#else /* CONFIG_SMP */
@@ -325,7 +325,7 @@ irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify)
}
static inline struct cpumask *
-irq_create_affinity_masks(const struct cpumask *affinity, int nvec)
+irq_create_affinity_masks(int nvec, const struct irq_affinity *affd)
{
return NULL;
}
diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c
index 8d92597..17360bd 100644
--- a/kernel/irq/affinity.c
+++ b/kernel/irq/affinity.c
@@ -51,16 +51,16 @@ static int get_nodes_in_cpumask(const struct cpumask *mask, nodemask_t *nodemsk)
/**
* irq_create_affinity_masks - Create affinity masks for multiqueue spreading
- * @affinity: The affinity mask to spread. If NULL cpu_online_mask
- * is used
- * @nvecs: The number of vectors
+ * @nvecs: The total number of vectors
+ * @affd: Description of the affinity requirements
*
* Returns the masks pointer or NULL if allocation failed.
*/
-struct cpumask *irq_create_affinity_masks(const struct cpumask *affinity,
- int nvec)
+struct cpumask *
+irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd)
{
- int n, nodes, vecs_per_node, cpus_per_vec, extra_vecs, curvec = 0;
+ int n, nodes, vecs_per_node, cpus_per_vec, extra_vecs, curvec;
+ int affv = nvecs - affd->pre_vectors - affd->post_vectors;
nodemask_t nodemsk = NODE_MASK_NONE;
struct cpumask *masks;
cpumask_var_t nmsk;
Check for NULL affd?
Cheers,
Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare@xxxxxxx +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG Nürnberg)
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