Subject: Re: [PATCH 1/1] vhost: Protect the virtqueue from being cleared whilst still in use

From: "Michael S. Tsirkin" <[email-masked]>
Date: Tue, 8 Mar 2022 06:05:24 -0500

On Tue, Mar 08, 2022 at 09:57:57AM +0100, Greg KH wrote:
> > > And what happens if the mutex is locked _RIGHT_ after you checked it?
> > > You still have a race...
> > 
> > No, we miss a warning that one time.  Memory is still protected.
> 
> Then don't warn on something that doesn't matter.  This line can be
> dropped as there's nothing anyone can do about it, right?

I mean, the reason I wanted the warning is because there's a kernel
bug, and it will break userspace. warning is just telling us this.
is the bug reacheable from userspace? if we knew that we won't
need the lock ...

-- 
MST