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From: Tiwei Bie <tiwei.bie@intel.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>
Cc: zhihong.wang@intel.com, jfreimann@redhat.com, dev@dpdk.org,
	mst@redhat.com, jasowang@redhat.com, wexu@redhat.com,
	Yuanhan Liu <yuanhan.liu@linux.intel.com>,
	Jens Freimann <jfreiman@redhat.com>
Subject: Re: [dpdk-dev] [PATCH v5 03/15] vhost: vring address setup for packed queues
Date: Sat, 30 Jun 2018 10:18:11 +0800	[thread overview]
Message-ID: <20180630021811.GA5533@debian> (raw)
In-Reply-To: <33a0f9cb-d672-826a-2587-5e91b83ade2f@redhat.com>

On Fri, Jun 29, 2018 at 06:34:09PM +0200, Maxime Coquelin wrote:
> On 06/29/2018 05:59 PM, Tiwei Bie wrote:
> > On Fri, Jun 22, 2018 at 03:43:15PM +0200, Maxime Coquelin wrote:
[...]
> > > diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
> > > index 34a614c97..671b4b3bf 100644
> > > --- a/lib/librte_vhost/vhost.h
> > > +++ b/lib/librte_vhost/vhost.h
> > > @@ -84,7 +84,10 @@ struct log_cache_entry {
> > >    * Structure contains variables relevant to RX/TX virtqueues.
> > >    */
> > >   struct vhost_virtqueue {
> > > -	struct vring_desc	*desc;
> > > +	union {
> > > +		struct vring_desc	*desc;
> > > +		struct vring_desc_packed   *desc_packed;
> > > +	};
> > >   	struct vring_avail	*avail;
> > >   	struct vring_used	*used;
> > >   	uint32_t		size;
> > > @@ -122,6 +125,8 @@ struct vhost_virtqueue {
> > >   	struct batch_copy_elem	*batch_copy_elems;
> > >   	uint16_t		batch_copy_nb_elems;
> > > +	uint16_t		used_wrap_counter;
> > > +	uint16_t		avail_wrap_counter;
> > 
> > Not quite sure about this. Do you think it will be
> > better to define wrap counters as bool (as only 0 or
> > 1 are available)?
> 
> I think it should work, but not sure this is cleaner.
> 
> When defining something as bool, I expect to use true or false
> for its assignment, but maybe that's me.
> 
> But I could certainly use uint8_t instead to reduce the size of the
> struct.
> 
> What do you think?

I don't have a strong opinion on this.
Jason suggested me to use bool in my patch [1].
So I wanted to hear your opinion too.

[1] https://lkml.org/lkml/2018/5/29/47

Best regards,
Tiwei Bie

  reply	other threads:[~2018-06-30  2:18 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-22 13:43 [dpdk-dev] [PATCH v5 00/15] Vhost: add support to packed ring layout Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 01/15] vhost: add virtio packed virtqueue defines Maxime Coquelin
2018-06-29 15:47   ` Tiwei Bie
2018-06-29 16:20     ` Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 02/15] vhost: add helpers for packed virtqueues Maxime Coquelin
2018-06-29 15:51   ` Tiwei Bie
2018-06-29 16:21     ` Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 03/15] vhost: vring address setup for packed queues Maxime Coquelin
2018-06-29 15:59   ` Tiwei Bie
2018-06-29 16:34     ` Maxime Coquelin
2018-06-30  2:18       ` Tiwei Bie [this message]
2018-07-01  9:58     ` Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 04/15] vhost: clear shadow used table index at flush time Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 05/15] vhost: make indirect desc table copy desc type agnostic Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 06/15] vhost: clear batch copy index at copy time Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 07/15] vhost: extract split ring handling from Rx and Tx functions Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 08/15] vhost: append shadow used ring function names with split Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 09/15] vhost: add shadow used ring support for packed rings Maxime Coquelin
2018-06-29 16:08   ` Tiwei Bie
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 10/15] vhost: create descriptor mapping function Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 11/15] vhost: add vector filling support for packed ring Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 12/15] vhost: add Rx " Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 13/15] vhost: add Tx " Maxime Coquelin
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 14/15] vhost: add notification " Maxime Coquelin
2018-06-29 16:22   ` Tiwei Bie
2018-06-22 13:43 ` [dpdk-dev] [PATCH v5 15/15] vhost: advertize packed ring layout support Maxime Coquelin

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