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From: Jason Wang <jasowang@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>, Eli Cohen <elic@nvidia.com>
Cc: eperezma <eperezma@redhat.com>,
	virtualization <virtualization@lists.linux-foundation.org>
Subject: Re: [Patch v1 3/3] vdpa/mlx5: Add multiqueue support
Date: Tue, 17 Aug 2021 13:06:19 +0800	[thread overview]
Message-ID: <607ee628-4b64-e5e5-7dfc-bf06f4e873c0@redhat.com> (raw)
In-Reply-To: <CACGkMEvu9tUWPkYqLoDzJ0gR=5RMstMhcU+OkhFtHn7TB5Ki6Q@mail.gmail.com>


在 2021/8/17 上午11:55, Jason Wang 写道:
>>>>> I think that could work. I will code this and update.
>>> It works fine when I am working with your version of qemu with support
>>> for multi queue.
>>>
>>> The problem is that it is broken on qemu v6.0.0. If I register my vdpa
>>> device with more than 2 data virtqueues, qemu won't even create a
>>> netdevice in the VM.
> Qemu should hide MQ feature in this case but looks like it doesn't.
>
> Will have a look.


So it looks to me current Qemu code doesn't take care about the case 
when a feature (e.g MQ):

1) supported by the vhost
2) enabled via the command line
3) but not supported by the Qemu

Not sure it's worth to bother.

Thanks


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  parent reply	other threads:[~2021-08-17  5:06 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20210809140800.97835-1-elic@nvidia.com>
     [not found] ` <20210809140800.97835-2-elic@nvidia.com>
2021-08-10  3:56   ` [Patch v1 1/3] vdpa/mlx5: Remove redundant header file inclusion Jason Wang
     [not found] ` <20210809140800.97835-3-elic@nvidia.com>
2021-08-10  4:32   ` [Patch v1 2/3] vdpa/mlx5: Add support for control VQ and MAC setting Jason Wang
     [not found]     ` <20210810071757.GC9133@mtl-vdi-166.wap.labs.mlnx>
2021-08-10  8:36       ` Jason Wang
     [not found] ` <20210809140800.97835-4-elic@nvidia.com>
2021-08-10  4:38   ` [Patch v1 3/3] vdpa/mlx5: Add multiqueue support Jason Wang
     [not found]     ` <20210811075347.GC56418@mtl-vdi-166.wap.labs.mlnx>
2021-08-11  8:37       ` Jason Wang
     [not found]         ` <20210811110401.GB64192@mtl-vdi-166.wap.labs.mlnx>
2021-08-12  3:19           ` Jason Wang
     [not found]             ` <20210812045535.GA99755@mtl-vdi-166.wap.labs.mlnx>
2021-08-12  6:47               ` Jason Wang
     [not found]                 ` <20210812070151.GA103566@mtl-vdi-166.wap.labs.mlnx>
2021-08-12  7:04                   ` Jason Wang
     [not found]                     ` <20210812095035.GA105096@mtl-vdi-166.wap.labs.mlnx>
2021-08-16  4:16                       ` Jason Wang
     [not found]                         ` <20210816054746.GA30532@mtl-vdi-166.wap.labs.mlnx>
2021-08-16  5:58                           ` Jason Wang
     [not found]                             ` <20210816165659.GA51703@mtl-vdi-166.wap.labs.mlnx>
2021-08-16 17:47                               ` Parav Pandit via Virtualization
2021-08-16 19:36                               ` Michael S. Tsirkin
2021-08-17  3:55                                 ` Jason Wang
2021-08-17  4:03                                   ` Parav Pandit via Virtualization
2021-08-17  4:19                                     ` Jason Wang
     [not found]                                       ` <20210817052644.GB74703@mtl-vdi-166.wap.labs.mlnx>
2021-08-17  5:48                                         ` Jason Wang
     [not found]                                           ` <20210817060136.GA75939@mtl-vdi-166.wap.labs.mlnx>
2021-08-17  8:57                                             ` Jason Wang
2021-08-18  3:01                                               ` Jason Wang
2021-08-17  5:06                                   ` Jason Wang [this message]
     [not found]                                   ` <20210817052406.GA74703@mtl-vdi-166.wap.labs.mlnx>
2021-08-17  5:47                                     ` Jason Wang

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