linux-kernel - Re: 5.0-rc1 KVM inspired "BUG: Bad page state in process" spew

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Message-ID: <20190114154619.GA5141@linux.intel.com>
Date:   Mon, 14 Jan 2019 07:46:20 -0800
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Mike Galbraith <efault@....de>
Cc:     Adam Borowski <kilobyte@...band.pl>, kvm <kvm@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: 5.0-rc1 KVM inspired "BUG: Bad page state in process" spew

On Sat, Jan 12, 2019 at 07:43:02AM +0100, Mike Galbraith wrote:
> On Wed, 2019-01-09 at 11:26 -0800, Sean Christopherson wrote:
> > 
> > I'll try to bisect.
> 
> Good luck with that.  I gave it a go, but that apparently invalidated
> the warrantee of my vm image :)

This is fixed in v5.0-rc2 by commit ba422731316d ("mm/mmu_notifier:
mm/rmap.c: Fix a mmu_notifier range bug in try_to_unmap_one").

Nested VMs are great for bisecting KVM issues :)