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Re: [Qemu-devel] [PATCH 1/2] Postcopy: Force allocation of all-zero prec


From: Andrea Arcangeli
Subject: Re: [Qemu-devel] [PATCH 1/2] Postcopy: Force allocation of all-zero precopy pages
Date: Thu, 27 Apr 2017 15:47:07 +0200
User-agent: Mutt/1.8.2 (2017-04-18)

On Thu, Apr 27, 2017 at 08:44:03AM +0200, Christian Borntraeger wrote:
> I have started instrumenting the kernel. I can see a set_pte_at for this 
> address
> and I see an (to be understood) invalidation shortly after that which explains
> why I get a fault.

Sounds great that you can see an invalidation shortly after, that is
the real source of the problem. Can you get a stack trace of such
invalidation?

Thanks!
Andrea



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