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Date:   Sat, 20 Jan 2018 10:38:10 +0100
From:   Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
To:     Al Viro <viro@ZenIV.linux.org.uk>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Matthew Wilcox <willy@infradead.org>,
        "Kirill A. Shutemov" <kirill@shutemov.name>,
        Peter Zijlstra <peterz@infradead.org>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
        Mel Gorman <mgorman@techsingularity.net>,
        Tony Luck <tony.luck@intel.com>,
        Vlastimil Babka <vbabka@suse.cz>,
        Michal Hocko <mhocko@kernel.org>,
        "hillf.zj" <hillf.zj@alibaba-inc.com>,
        Hugh Dickins <hughd@google.com>,
        Oleg Nesterov <oleg@redhat.com>,
        Rik van Riel <riel@redhat.com>,
        Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
        Vladimir Davydov <vdavydov.dev@gmail.com>,
        Ingo Molnar <mingo@kernel.org>,
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Subject: Re: [mm 4.15-rc8] Random oopses under memory pressure.
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On Sat, Jan 20, 2018 at 05:24:32AM +0000, Al Viro wrote:
> On Sat, Jan 20, 2018 at 02:02:37AM +0000, Al Viro wrote:
> 
> > Note that those sizes are rather sensitive to lockdep, spinlock debugging, etc.
> 
> That they certainly are: on one of the testing .config I'm using it gave this:
>    1104 sizeof struct page = 56

Yes, I get this already with defconfig.
It's a problem with sparse which ignore the alignment attribute
(in fact all 'trailing' attributes in type declarations).

I'm looking to fix it.

-- Luc Van Oostenryck