linux-kernel - Re: v4.6 kernel BUG at mm/rmap.c:1101!

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Message-ID: <20160525094734.GJ1789@lahna.fi.intel.com>
Date:	Wed, 25 May 2016 12:47:34 +0300
From:	Mika Westerberg <mika.westerberg@...ux.intel.com>
To:	Andrea Arcangeli <aarcange@...hat.com>
Cc:	"Kirill A. Shutemov" <kirill@...temov.name>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Subject: Re: v4.6 kernel BUG at mm/rmap.c:1101!

On Mon, May 23, 2016 at 05:18:55PM +0200, Andrea Arcangeli wrote:
> > diff --git a/mm/rmap.c b/mm/rmap.c
> > index 8a839935b18c..0ea5d9071b32 100644
> > --- a/mm/rmap.c
> > +++ b/mm/rmap.c
> > @@ -1098,6 +1098,8 @@ void page_move_anon_rmap(struct page *page,
> >  
> >  	VM_BUG_ON_PAGE(!PageLocked(page), page);
> >  	VM_BUG_ON_VMA(!anon_vma, vma);
> > +	if (IS_ENABLED(CONFIG_DEBUG_VM) && PageTransHuge(page))
> > +		address &= HPAGE_PMD_MASK;
> >  	VM_BUG_ON_PAGE(page->index != linear_page_index(vma, address), page);
> >  
> >  	anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON;
> 
> Reviewed-by: Andrea Arcangeli <aarcange@...hat.com>

My desktop survived overnight without crash so I guess this is

Tested-by: Mika Westerberg <mika.westerberg@...ux.intel.com>

Thanks.