linux-kernel - Re: [PATCH 0/4] irq: fix support for allocating sets of IRQs

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Date:   Sun, 4 Nov 2018 10:24:53 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Ming Lei <ming.lei@...hat.com>, linux-block@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>,
        Hannes Reinecke <hare@...e.com>,
        Keith Busch <keith.busch@...el.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Long Li <longli@...uxonhyperv.com>
Subject: Re: [PATCH 0/4] irq: fix support for allocating sets of IRQs

On 11/4/18 5:02 AM, Thomas Gleixner wrote:
> Jens,
> 
> On Sat, 3 Nov 2018, Jens Axboe wrote:
> 
>> On 11/2/18 8:59 AM, Ming Lei wrote:
>>> Hi Jens,
>>>
>>> As I mentioned, there are at least two issues in the patch of '
>>> irq: add support for allocating (and affinitizing) sets of IRQs':
>>>
>>> 1) it is wrong to pass 'mask + usedvec' to irq_build_affinity_masks()
>>>
>>> 2) we should spread all possible CPUs in 2-stage way on each set of IRQs
>>>
>>> The fix isn't trivial, and I introduce two extra patches as preparation,
>>> then the implementation can be more clean.
>>>
>>> The patchset is against mq-maps branch of block tree, feel free to
>>> integrate into the whole patchset of multiple queue maps.
>>
>> Thanks Ming, I ran this through my testing, and I end up with the
>> same maps and affinities for all the cases I cared about. I'm going
>> to drop my initial version, and add the three.
> 
> So I assume, that I can pick up Mings series instead.

Yes, let's do that.

> There is another patch pending affecting the irq affinity spreading. Can
> you folks please have a look at it?
> 
> https://lkml.kernel.org/r/20181102180248.13583-1-longli@linuxonhyperv.com

I'll give that a look and test. Thanks for the heads-up.

-- 
Jens Axboe