[ANNOUNCE] Open Fabrics Verbs Working Group (OFVWG) meeting next week - 2/7/2017 at 11:00PST

[ANNOUNCE] Open Fabrics Verbs Working Group (OFVWG) meeting next week - 2/7/2017 at 11:00PST

[Liran Liss]

Hi all,

Yes, it has been some time since the last meeting...
We would like to solicit a discussion next week on an API proposal for binding RDMA completion vectors to CPUs.

We will use the usual time slot at 11:00PST.
See details below.

Regards,
--Liran


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Re: [ANNOUNCE] Open Fabrics Verbs Working Group (OFVWG) meeting next week - 2/7/2017 at 11:00PST

[Bart Van Assche]

On Thu, 2017-02-02 at 22:17 +0000, Liran Liss wrote:
> We would like to solicit a discussion next week on an API proposal
> for binding RDMA completion vectors to CPUs.

Hello Liran,

Are you aware that Christoph Hellwig's patch series for automatically
spreading IRQs over CPUs has been accepted upstream some time ago? See
also pci_alloc_irq_vectors_affinity() in drivers/pci/msi.c. Is the scope
of this meeting to modify that existing functionality or are you perhaps
looking for an API that allows to query the mapping chosen by
pci_alloc_irq_vectors_affinity()?

Thanks,

Bart.--
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Re: [ANNOUNCE] Open Fabrics Verbs Working Group (OFVWG) meeting next week - 2/7/2017 at 11:00PST

[Christoph Hellwig]

On Thu, Feb 02, 2017 at 10:17:35PM +0000, Liran Liss wrote:
> Hi all,
> 
> Yes, it has been some time since the last meeting...
> We would like to solicit a discussion next week on an API proposal for binding RDMA completion vectors to CPUs.

Please have the discussion on the mailing list.  I have a large patch
series I need to rebase for 4.11 that I will post soon, which wires up
the RDMA drivers to use the new IRQ level MSI-X vector assignment code
and exposes it to RDMA ULPs.
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RE: [ANNOUNCE] Open Fabrics Verbs Working Group (OFVWG) meeting next week - 2/7/2017 at 11:00PST

[Liran Liss]

> From: Bart Van Assche [mailto:Bart.VanAssche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org]

> Are you aware that Christoph Hellwig's patch series for automatically spreading
> IRQs over CPUs has been accepted upstream some time ago? See also
> pci_alloc_irq_vectors_affinity() in drivers/pci/msi.c. Is the scope of this meeting
> to modify that existing functionality or are you perhaps looking for an API that
> allows to query the mapping chosen by pci_alloc_irq_vectors_affinity()?
>

Hi Bart, Christoph,

We want to discuss an extension to user-space Verbs, so I think that this has no
direct relation to Christoph's ongoing work.

Obviously, it would impact the ABI, so if the general idea makes sense we will
continue on the list...

 > Thanks,
> 
> Bart.
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