linux-kernel - Re: [PATCH 5/6] vduse: Support registering userspace memory for IOTLB

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Message-ID: <20220629072825-mutt-send-email-mst@kernel.org>
Date:   Wed, 29 Jun 2022 07:28:53 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Yongji Xie <xieyongji@...edance.com>
Cc:     Jason Wang <jasowang@...hat.com>,
        Liu Xiaodong <xiaodong.liu@...el.com>,
        Maxime Coquelin <maxime.coquelin@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        virtualization <virtualization@...ts.linux-foundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        songmuchun@...edance.com
Subject: Re: [PATCH 5/6] vduse: Support registering userspace memory for IOTLB

On Wed, Jun 29, 2022 at 06:19:31PM +0800, Yongji Xie wrote:
> > No i mean you decrement the lock twice. Question is can two bounce
> > buffers share a page?
> >
> 
> I think we can't. I will find a way to prevent it.
> 
> Thanks,
> Yongji

I guess it doesn't matter much then.

-- 
MST