Messages in this thread | | | Subject | Re: [PATCH V3 0/5] genirq/affinity: add .calc_sets for improving IRQ allocation & spread | From | Jens Axboe <> | Date | Wed, 13 Feb 2019 07:36:01 -0700 |
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On 2/13/19 3:50 AM, Ming Lei wrote: > Hi, > > Currently pre-caculated set vectors are provided by driver for > allocating & spread vectors. This way only works when drivers passes > same 'max_vecs' and 'min_vecs' to pci_alloc_irq_vectors_affinity(), > also requires driver to retry the allocating & spread. > > As Bjorn and Keith mentioned, the current usage & interface for irq sets > is a bit awkward because the retrying should have been avoided by providing > one resonable 'min_vecs'. However, if 'min_vecs' isn't same with > 'max_vecs', number of the allocated vectors is unknown before calling > pci_alloc_irq_vectors_affinity(), then each set's vectors can't be > pre-caculated. > > Add a new callback of .calc_sets into 'struct irq_affinity' so that > driver can caculate set vectors after IRQ vector is allocated and > before spread IRQ vectors.
Much improved, thanks for doing this work. You can add
Reviewed-by: Jens Axboe <axboe@kernel.dk>
if you want.
-- Jens Axboe
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