On Sun, 6 Nov 2016, Christoph Hellwig wrote:
> drivers/pci/msi.c | 61 ++++++++++++++++++++++++--------------------
> include/linux/interrupt.h | 26 ++++++++++++++++---
> include/linux/pci.h | 14 ++++++----
> kernel/irq/affinity.c | 65 ++++++++++++++++++++++++-----------------------
Can you please split that up in bits and pieces. This change it all patch
is not fun to review.
> 4 files changed, 98 insertions(+), 68 deletions(-)
>
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index bfdd074..c312535 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -551,14 +551,15 @@ static int populate_msi_sysfs(struct pci_dev *pdev)
> }
>
> static struct msi_desc *
> -msi_setup_entry(struct pci_dev *dev, int nvec, bool affinity)
> +msi_setup_entry(struct pci_dev *dev, int nvec, bool affinity,
> + struct irq_affinity *desc)
This should be 'const struct ....'. And can we please name this *affd or
something like that?
> {
> struct cpumask *masks = NULL;
> struct msi_desc *entry;
> u16 control;
>
> if (affinity) {
If we do it right, then we can get rid of the bool and depend on that irq
affinity pointer. We just have to push down the flag evaluation to
pci_alloc_irq_vectors[_affinity].
> --- a/include/linux/interrupt.h
> +++ b/include/linux/interrupt.h
> @@ -232,6 +232,24 @@ struct irq_affinity_notify {
> void (*release)(struct kref *ref);
> };
>
> +/*
> + * This structure allows drivers to optionally specify complex IRQ affinity
> + * requirements.
> + */
> +struct irq_affinity {
> + /*
> + * Number of vectors before the main affinity vectors that should not
> + * have have any CPU affinity:
> + */
Please make that kernel doc.
> + int pre_vectors;
> +
> + /*
> + * Number of vectors after the main affinity vectors that should not
> + * have have any CPU affinity:
> + */
> + int post_vectors;
> +};
> +
> diff --git a/include/linux/pci.h b/include/linux/pci.h
> index 0e49f70..be0abd2 100644
> --- a/include/linux/pci.h
> +++ b/include/linux/pci.h
...
> +#define pci_alloc_irq_vectors(dev, min_vecs, max_vecs, flags) \
> + pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags, NULL)
static inline please
> #endif /* LINUX_PCI_H */
> diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c
> index 17f51d63..151b285 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
> + * @desc: description of the affinity requirements
@affd and sentence starts with an uppercase letter, please.
> * @nvecs: The number of vectors
If you rename the argument then you want to rename this as well.
> *
> * 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(struct irq_affinity *desc,
> + int total_nvec)
Thanks,
tglx
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