linux-kernel - Re: [PATCH v2] mm:mempolicy: skip VM_HUGETLB and VM

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Message-ID: <alpine.DEB.2.10.1601201532180.18155@chino.kir.corp.google.com>
Date:	Wed, 20 Jan 2016 15:32:35 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Liang Chen <liangchen.linux@...il.com>
cc:	linux-mm@...ck.org, n-horiguchi@...jp.nec.com, riel@...hat.com,
	mgorman@...e.de, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, Gavin Guo <gavin.guo@...onical.com>
Subject: Re: [PATCH v2] mm:mempolicy: skip VM_HUGETLB and VM_MIXEDMAP VMA
 for lazy mbind

On Wed, 20 Jan 2016, Liang Chen wrote:

> VM_HUGETLB and VM_MIXEDMAP vma needs to be excluded to avoid compound
> pages being marked for migration and unexpected COWs when handling
> hugetlb fault.
> 
> Thanks to Naoya Horiguchi for reminding me on these checks.
> 
> Signed-off-by: Liang Chen <liangchen.linux@...il.com>
> Signed-off-by: Gavin Guo <gavin.guo@...onical.com>
> Suggested-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>

Acked-by: David Rientjes <rientjes@...gle.com>