netdev - Re: [PATCH mlx5-next] RDMA/mlx5: Don't use cached IRQ affinity mask

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Date:   Mon, 23 Jul 2018 19:53:09 +0300
From:   Max Gurtovoy <maxg@...lanox.com>
To:     Jason Gunthorpe <jgg@...lanox.com>
CC:     Steve Wise <swise@...ngridcomputing.com>,
        'Sagi Grimberg' <sagi@...mberg.me>,
        'Leon Romanovsky' <leon@...nel.org>,
        'Doug Ledford' <dledford@...hat.com>,
        'RDMA mailing list' <linux-rdma@...r.kernel.org>,
        'Saeed Mahameed' <saeedm@...lanox.com>,
        'linux-netdev' <netdev@...r.kernel.org>
Subject: Re: [PATCH mlx5-next] RDMA/mlx5: Don't use cached IRQ affinity mask



On 7/23/2018 7:49 PM, Jason Gunthorpe wrote:
> On Fri, Jul 20, 2018 at 04:25:32AM +0300, Max Gurtovoy wrote:
>>
>>>>> [ 2032.194376] nvme nvme0: failed to connect queue: 9 ret=-18
>>>>
>>>> queue 9 is not mapped (overlap).
>>>> please try the bellow:
>>>>
>>>
>>> This seems to work.  Here are three mapping cases:  each vector on its
>>> own cpu, each vector on 1 cpu within the local numa node, and each
>>> vector having all cpus in its numa node.  The 2nd mapping looks kinda
>>> funny, but I think it achieved what you wanted?  And all the cases
>>> resulted in successful connections.
>>>
>>
>> Thanks for testing this.
>> I slightly improved the setting of the left CPUs and actually used Sagi's
>> initial proposal.
>>
>> Sagi,
>> please review the attached patch and let me know if I should add your
>> signature on it.
>> I'll run some perf test early next week on it (meanwhile I run login/logout
>> with different num_queues successfully and irq settings).
>>
>> Steve,
>> It will be great if you can apply the attached in your system and send your
>> findings.
>>
>> Regards,
>> Max,
> 
> So the conlusion to this thread is that Leon's mlx5 patch needs to wait
> until this block-mq patch is accepted?

Yes, since nvmf is the only user of this function.
Still waiting for comments on the suggested patch :)

> 
> Thanks,
> Jason
>