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From: Andrea Arcangeli <aarcange@redhat.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Peter Xu <peterx@redhat.com>,
	"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
	qemu-devel@nongnu.org, quintela@redhat.com, lvivier@redhat.com
Subject: Re: [Qemu-devel] [PATCH 1/2] Postcopy: Force allocation of all-zero precopy pages
Date: Thu, 27 Apr 2017 15:47:07 +0200	[thread overview]
Message-ID: <20170427134707.GG3508@redhat.com> (raw)
In-Reply-To: <750be300-6f14-cbef-4b38-f28751e28032@de.ibm.com>

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

  reply	other threads:[~2017-04-27 13:47 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-26 18:37 [Qemu-devel] [PATCH 0/2] Postcopy fix and traces Dr. David Alan Gilbert (git)
2017-04-26 18:37 ` [Qemu-devel] [PATCH 1/2] Postcopy: Force allocation of all-zero precopy pages Dr. David Alan Gilbert (git)
2017-04-26 19:00   ` Christian Borntraeger
2017-04-26 19:04     ` Dr. David Alan Gilbert
2017-04-26 19:37       ` Andrea Arcangeli
2017-04-27  3:20         ` Peter Xu
2017-04-27  6:44           ` Christian Borntraeger
2017-04-27 13:47             ` Andrea Arcangeli [this message]
2017-04-28 13:19               ` Christian Borntraeger
2017-04-28 14:24                 ` Dr. David Alan Gilbert
2017-04-26 19:52       ` Christian Borntraeger
2017-04-26 19:54         ` Christian Borntraeger
2017-04-26 19:35   ` Juan Quintela
2017-04-27  8:03     ` Dr. David Alan Gilbert
2017-04-26 18:37 ` [Qemu-devel] [PATCH 2/2] migration: Extra tracing Dr. David Alan Gilbert (git)
2017-04-26 18:48   ` Christian Borntraeger
2017-05-02 13:17   ` Philippe Mathieu-Daudé
2017-05-04  8:40   ` Juan Quintela

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