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Subject: Re: BSOD with [PATCH 00/13] mmu_notifier kill invalidate_page callback
To: =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= <jglisse@redhat.com>,
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References: <20170829235447.10050-1-jglisse@redhat.com>
 <20171130093320.66cxaoj45g2ttzoh@nora.maurer-it.com>
From: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <39823aee-4918-f87c-8342-89eff622ee43@redhat.com>
Date: Thu, 30 Nov 2017 12:20:47 +0100
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On 30/11/2017 10:33, Fabian Grünbichler wrote:
> 
> It was reverted in 785373b4c38719f4af6775845df6be1dfaea120f after which
> the symptoms disappeared until this series was merged, which contains
> 
> 369ea8242c0fb5239b4ddf0dc568f694bd244de4 mm/rmap: update to new mmu_notifier semantic v2
> 
> We haven't bisected the individual commits of the series yet, but the
> commit immediately preceding its merge exhibits no problems, while
> everything after does. It is not known whether the bug is actually in
> the series itself, or whether increasing the likelihood of triggering it
> is just a side-effect. There is a similar report[2] concerning an
> upgrade from 4.12.12 to 4.12.13, which does not contain this series in
> any form AFAICT but might be worth another look as well.

I know of one issue in this series (invalidate_page was removed from KVM
without reimplementing it as invalidate_range).  I'll try to prioritize
the fix, but I don't think I can do it before Monday.

Thanks,

Paolo