linux-kernel - Re: [PATCH 00/16] Refreshed page-flags patchset

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Message-ID: <alpine.DEB.2.20.1509241111590.21022@east.gentwo.org>
Date:	Thu, 24 Sep 2015 11:13:22 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Hugh Dickins <hughd@...gle.com>,
	Dave Hansen <dave.hansen@...el.com>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Steve Capper <steve.capper@...aro.org>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.cz>,
	Jerome Marchand <jmarchan@...hat.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 00/16] Refreshed page-flags patchset

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?
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