linux-kernel - Re: [PATCH v1] s390/virtio_ccw: don't allocate/assign airqs for non-existing queues

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Message-ID: <20250407044743-mutt-send-email-mst@kernel.org>
Date: Mon, 7 Apr 2025 04:49:14 -0400
From: "Michael S. Tsirkin" <mst@...hat.com>
To: David Hildenbrand <david@...hat.com>
Cc: Halil Pasic <pasic@...ux.ibm.com>, linux-kernel@...r.kernel.org,
	linux-s390@...r.kernel.org, virtualization@...ts.linux.dev,
	kvm@...r.kernel.org, Chandra Merla <cmerla@...hat.com>,
	Stable@...r.kernel.org, Cornelia Huck <cohuck@...hat.com>,
	Thomas Huth <thuth@...hat.com>, Eric Farman <farman@...ux.ibm.com>,
	Heiko Carstens <hca@...ux.ibm.com>,
	Vasily Gorbik <gor@...ux.ibm.com>,
	Alexander Gordeev <agordeev@...ux.ibm.com>,
	Christian Borntraeger <borntraeger@...ux.ibm.com>,
	Sven Schnelle <svens@...ux.ibm.com>,
	Wei Wang <wei.w.wang@...el.com>
Subject: Re: [PATCH v1] s390/virtio_ccw: don't allocate/assign airqs for
 non-existing queues

On Mon, Apr 07, 2025 at 10:44:21AM +0200, David Hildenbrand wrote:
> > 
> > 
> > 
> > > Whoever adds new feat_X *must be aware* about all previous features,
> > > otherwise we'd be reusing feature bits and everything falls to pieces.
> > 
> > 
> > The knowledge is supposed be limited to which feature bit to use.
> 
> I think we also have to know which virtqueue bits can be used, right?
> 

what are virtqueue bits? vq number?


-- 
MST