Re: [PATCH 2/2] KVM, Fix QEMU-KVM is killed by guest SRAO MCE

[Avi Kivity]

On 04/28/2010 05:56 AM, Huang Ying wrote:
>    
> > > Just want to use the side effect of copy_from_user, SIGBUS will be sent
> > > to current process because the page touched is marked as poisoned. That
> > > is, failure is expected, so the return value is not checked.
> > >
> > >        
> > What if the failure doesn't happen?  Say, someone mmap()ed over the page.
> >      
> Sorry, not get your idea clearly. hva is re-mmap()ed? We just read the
> hva, not write, so I think it should be OK here.
>
>    

We don't generate a signal in this case.  Does the code continue to work 
correctly (not sure what correctly is in this case... should probably 
just continue).

There's also the possibility of -EFAULT.

--
error compiling committee.c: too many arguments to function

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