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Subject: Re: BSOD with [PATCH 00/13] mmu_notifier kill invalidate_page
 callback
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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To: =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= <jglisse@redhat.com>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>, Linus Torvalds <torvalds@linux-foundation.org>, Andrew Morton <akpm@linux-foundation.org>, Andrea Arcangeli <aarcange@redhat.com>, Joerg Roedel <jroedel@suse.de>, Dan Williams <dan.j.williams@intel.com>, Sudeep Dutt <sudeep.dutt@intel.com>, Ashutosh Dixit <ashutosh.dixit@intel.com>, Dimitri Sivanich <sivanich@sgi.com>, Jack Steiner <steiner@sgi.com>, =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= <rkrcmar@redhat.com>, linuxppc-dev@lists.ozlabs.org, iommu@lists.linux-foundation.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org

On 30/11/2017 10:33, Fabian GrA 1/4 nbichler 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

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