linux-kernel - Re: [RFC V1 08/13] vduse: flush workers on suspend

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Message-ID: <3c417ae0-16af-4c63-aca7-6f4a7578cb04@oracle.com>
Date: Wed, 17 Jan 2024 15:31:16 -0500
From: Steven Sistare <steven.sistare@...cle.com>
To: Jason Wang <jasowang@...hat.com>
Cc: virtualization@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Si-Wei Liu <si-wei.liu@...cle.com>,
        Eugenio Perez Martin <eperezma@...hat.com>,
        Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
        Dragos Tatulea
 <dtatulea@...dia.com>, Eli Cohen <elic@...dia.com>,
        Xie Yongji <xieyongji@...edance.com>
Subject: Re: [RFC V1 08/13] vduse: flush workers on suspend

On 1/10/2024 10:09 PM, Jason Wang wrote:
> On Thu, Jan 11, 2024 at 4:40 AM Steve Sistare <steven.sistare@...cle.com> wrote:
>>
>> To pass ownership of a live vdpa device to a new process, the user
>> suspends the device, calls VHOST_NEW_OWNER to change the mm, and calls
>> VHOST_IOTLB_REMAP to change the user virtual addresses to match the new
>> mm.  Flush workers in suspend to guarantee that no worker sees the new
>> mm and old VA in between.
>>
>> Signed-off-by: Steve Sistare <steven.sistare@...cle.com>
> 
> It seems we need a better title, probably "suspend support for vduse"?
> And it looks better to be an separate patch.

Will do - steve