linux-kernel - Re: [RFC PATCH 0/3] Sharing MSIX irq for tx/rx queue pairs

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Date:	Mon, 05 Jan 2015 12:09:36 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Jason Wang <jasowang@...hat.com>, mst@...hat.com,
	virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org
Cc:	Jason Wang <jasowang@...hat.com>
Subject: Re: [RFC PATCH 0/3] Sharing MSIX irq for tx/rx queue pairs

Jason Wang <jasowang@...hat.com> writes:
> Hi all:
>
> This series try to share MSIX irq for each tx/rx queue pair. This is
> done through:
>
> - introducing virtio pci channel which are group of virtqueues that
>   sharing a single MSIX irq (Patch 1)
> - expose channel setting to virtio core api (Patch 2)
> - try to use channel setting in virtio-net (Patch 3)

Hi Jason,

        Is "channel" a term you created yourself, or something I was
just unaware of?  irq_group would seem more obvious, if the former.

> For the transport that does not support channel, channel paramters
> were simply ignored. For devices that does not use channel, it can
> simply pass NULL or zero to virito core.
>
> With the patch, 1 MSIX irq were saved for each TX/RX queue pair.

It seems fairly straightforward.

Acked-by: Rusty Russell <rusty@...tcorp.com.au>

Thanks,
Rusty.
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