linux-kernel - Re: [PATCH 11/63] mm: Close races between THP migration and PMD numa clearing

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Message-ID: <20130930084735.GA2425@suse.de>
Date:	Mon, 30 Sep 2013 09:52:59 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Rik van Riel <riel@...hat.com>
Cc:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 11/63] mm: Close races between THP migration and PMD numa
 clearing

On Fri, Sep 27, 2013 at 02:26:56PM +0100, Mel Gorman wrote:
> @@ -1732,9 +1732,9 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm,
>  	entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma);
>  	entry = pmd_mkhuge(entry);
>  
> -	page_add_new_anon_rmap(new_page, vma, haddr);
> -
> +	pmdp_clear_flush(vma, address, pmd);
>  	set_pmd_at(mm, haddr, pmd, entry);
> +	page_add_new_anon_rmap(new_page, vma, haddr);
>  	update_mmu_cache_pmd(vma, address, &entry);
>  	page_remove_rmap(page);
>  	/*

pmdp_clear_flush should have used haddr

-- 
Mel Gorman
SUSE Labs
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