linux-kernel - Re: [PATCH 11/14] irq: add support for allocating (and affinitizing) sets of IRQs

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Date:   Tue, 30 Oct 2018 11:22:34 -0600
From:   Keith Busch <keith.busch@...el.com>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-block@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 11/14] irq: add support for allocating (and affinitizing)
 sets of IRQs

On Tue, Oct 30, 2018 at 11:09:04AM -0600, Jens Axboe wrote:
> Pretty trivial, below. This also keeps the queue mapping calculations
> more clean, as we don't have to do one after we're done allocating
> IRQs.

Yep, this addresses my concern. It less efficient than PCI since PCI
can usually jump straight to a valid vector count in a single iteration
where this only subtracts by 1. I really can't be bothered to care for
optimizing that, so this works for me! :)