linux-kernel - Re: [PATCH vhost next 06/10] vdpa: Add means to communicate vq status on get_vq

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 16 Jul 2020 17:35:18 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Eli Cohen <eli@...lanox.com>
Cc:     mst@...hat.com, virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, shahafs@...lanox.com,
        saeedm@...lanox.com, Parav Pandit <parav@...lanox.com>
Subject: Re: [PATCH vhost next 06/10] vdpa: Add means to communicate vq status
 on get_vq_state


On 2020/7/16 下午4:21, Eli Cohen wrote:
> On Thu, Jul 16, 2020 at 04:11:00PM +0800, Jason Wang wrote:
>> On 2020/7/16 下午3:23, Eli Cohen wrote:
>>> Currently, get_vq_state() is used only to pass the available index value
>>> of a vq. Extend the struct to return status on the VQ to the caller.
>>> For now, define VQ_STATE_NOT_READY. In the future it will be extended to
>>> include other infomration.
>>>
>>> Modify current vdpa driver to update this field.
>>>
>>> Reviewed-by: Parav Pandit<parav@...lanox.com>
>>> Signed-off-by: Eli Cohen<eli@...lanox.com>
>> What's the difference between this and get_vq_ready()?
>>
>> Thanks
>>
> There is no difference. It is just a way to communicate a problem to
> with the state of the VQ back to the caller. This is not available now.
> I think an asynchronous is preferred but that is not available
> currently.


I still don't see the reason, maybe you can give me an example?

Thanks