Re: [CRIU] x86: Hardware breakpoints are not always triggered

From: Paolo Bonzini
Date: Sun Jan 31 2016 - 06:02:01 EST

On 29/01/2016 23:21, Andrew Vagin wrote:
> On Thu, Jan 28, 2016 at 02:42:25PM -0800, Andrey Wagin wrote:
>> On Thu, Jan 28, 2016 at 10:33:28PM +0100, Paolo Bonzini wrote:
>>> On 28/01/2016 09:31, Andrey Wagin wrote:
>>>> I tried to print drX registers after a break-point. Looks like they
>>>> are set correctly.
>>> Can you try this KVM patch?
>> Looks like it fixes a case when reproducers are running only in VM.
> Actually Oleg's reproducer detects the bug with this patch when they are
> rinning only in VM.

That's actually a good thing, because the patch was a long shot and I
had no clue _why_ it would have fixed the bug. Oleg's reproducer
spanning host and a VM actually gives me an idea of what is going on,
I'll try to reproduce this week.