linux-kernel - Re: [PATCH 20/52] mm, numa: Implement migrate-on-fault lazy NUMA strategy for regular and THP pages

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Date:	Wed, 5 Dec 2012 09:43:58 +0000
From:	Mel Gorman <mgorman@...e.de>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Turner <pjt@...gle.com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Christoph Lameter <cl@...ux.com>,
	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Johannes Weiner <hannes@...xchg.org>,
	Hugh Dickins <hughd@...gle.com>
Subject: Re: [PATCH 20/52] mm, numa: Implement migrate-on-fault lazy NUMA
 strategy for regular and THP pages

On Tue, Dec 04, 2012 at 04:55:13PM -0800, David Rientjes wrote:
> Commit "mm, numa: Implement migrate-on-fault lazy NUMA strategy for 
> regular and THP pages" breaks the build because HPAGE_PMD_SHIFT and 
> HPAGE_PMD_MASK defined to explode without CONFIG_TRANSPARENT_HUGEPAGE:
> 
> mm/migrate.c: In function 'migrate_misplaced_transhuge_page_put':
> mm/migrate.c:1549: error: call to '__build_bug_failed' declared with attribute error: BUILD_BUG failed
> mm/migrate.c:1564: error: call to '__build_bug_failed' declared with attribute error: BUILD_BUG failed
> mm/migrate.c:1566: error: call to '__build_bug_failed' declared with attribute error: BUILD_BUG failed
> mm/migrate.c:1573: error: call to '__build_bug_failed' declared with attribute error: BUILD_BUG failed
> mm/migrate.c:1606: error: call to '__build_bug_failed' declared with attribute error: BUILD_BUG failed
> mm/migrate.c:1648: error: call to '__build_bug_failed' declared with attribute error: BUILD_BUG failed
> 
> CONFIG_NUMA_BALANCING allows compilation without enabling transparent 
> hugepages, so define the dummy function for such a configuration and only 
> define migrate_misplaced_transhuge_page_put() when transparent hugepages 
> are enabled.
> 
> Signed-off-by: David Rientjes <rientjes@...gle.com>

Thanks David. I pushed the equivalent for the balancenuma tree and
should be included in the balancenuma-v10 tag or mm-balancenuma-v10r3
branch at
git://git.kernel.org/pub/scm/linux/kernel/git/mel/linux-balancenuma.git

-- 
Mel Gorman
SUSE Labs
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