netdev - Re: [PATCH vhost 01/17] virtio_ring: introduce vring_need_unmap

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Message-ID: <CACGkMEsi4B7Rz7Uu-3sTEH=9XRBRDmNSacZkVt6zxaC-FbYqhg@mail.gmail.com>
Date: Wed, 31 Jan 2024 17:12:07 +0800
From: Jason Wang <jasowang@...hat.com>
To: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
Cc: virtualization@...ts.linux.dev, Richard Weinberger <richard@....at>, 
	Anton Ivanov <anton.ivanov@...bridgegreys.com>, Johannes Berg <johannes@...solutions.net>, 
	"Michael S. Tsirkin" <mst@...hat.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Hans de Goede <hdegoede@...hat.com>, 
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
	Vadim Pasternak <vadimp@...dia.com>, Bjorn Andersson <andersson@...nel.org>, 
	Mathieu Poirier <mathieu.poirier@...aro.org>, Cornelia Huck <cohuck@...hat.com>, 
	Halil Pasic <pasic@...ux.ibm.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>, Alexei Starovoitov <ast@...nel.org>, 
	Daniel Borkmann <daniel@...earbox.net>, Jesper Dangaard Brouer <hawk@...nel.org>, 
	John Fastabend <john.fastabend@...il.com>, Benjamin Berg <benjamin.berg@...el.com>, 
	Yang Li <yang.lee@...ux.alibaba.com>, linux-um@...ts.infradead.org, 
	netdev@...r.kernel.org, platform-driver-x86@...r.kernel.org, 
	linux-remoteproc@...r.kernel.org, linux-s390@...r.kernel.org, 
	kvm@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH vhost 01/17] virtio_ring: introduce vring_need_unmap_buffer

On Tue, Jan 30, 2024 at 7:42 PM Xuan Zhuo <xuanzhuo@...ux.alibaba.com> wrote:
>
> To make the code readable, introduce vring_need_unmap_buffer() to
> replace do_unmap.
>
>    use_dma_api premapped -> vring_need_unmap_buffer()
> 1. false       false        false
> 2. true        false        true
> 3. true        true         false
>
> Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>

Acked-by: Jason Wang <jasowang@...hat.com>

Thanks