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Date: Thu, 24 Sep 2015 23:25:03 +0300
From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Christoph Lameter <cl@linux.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Hugh Dickins <hughd@google.com>, Dave Hansen <dave.hansen@intel.com>,
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        "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
        Johannes Weiner <hannes@cmpxchg.org>, Michal Hocko <mhocko@suse.cz>,
        Jerome Marchand <jmarchan@redhat.com>,
        Sasha Levin <sasha.levin@oracle.com>, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org
Subject: Re: [PATCH 00/16] Refreshed page-flags patchset
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On Thu, Sep 24, 2015 at 11:13:22AM -0500, Christoph Lameter wrote:
> On Thu, 24 Sep 2015, Kirill A. Shutemov wrote:
> 
> > As requested, here's reworked version of page-flags patchset.
> > Updated version should fit more naturally into current code base.
> 
> This is certainly great for specialized debugging hunting for improper
> handling of page flags for compound pages but a regular debug
> kernel will get a mass of VM_BUG_ON(s) at numerous page flag uses in the
> code. Is that really useful in general for a debug kernel?

As I said before, it was useful for me in few cases.

I can wrap these VM_BUG_ONs under separate config, if it helps.

-- 
 Kirill A. Shutemov