Re: [Xen-devel] [PATCH] x86/mm: disallow mmu hypercalls for a dying domain

[Kouya Shimura <kouya@xxxxxxxxxxxxxx>]

I observed that dom0 kept on issuing a mmu_update hypercall while the
domain is dying. So I don't feel happy with it. 
But I'm ok if the patch is dropped.

Thanks,
Kouya

Keir Fraser writes:
> Since the check is made with no locks held, I don't think any race can be
> completely avoided here. I'm not sure the performance argument holds much
> water either -- this just looks like a pointless extra check.
> 
>  -- Keir
> 
> On 27/11/2009 06:22, "Kouya Shimura" <kouya@xxxxxxxxxxxxxx> wrote:
> 
> > The race condition should be avoided for efficiency.
> > 
> > Signed-off-by: Kouya Shimura <kouya@xxxxxxxxxxxxxx>
> > 
> 

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