linux-kernel - Re: [PATCH] mm: mempolicy: skip non-migratable VMAs when setting MPOL_MF

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Message-ID: <568D33F0.7080302@redhat.com>
Date:	Wed, 6 Jan 2016 10:34:08 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Liang Chen <liangchen.linux@...il.com>, linux-mm@...ck.org
Cc:	mgorman@...e.de, akpm@...ux-foundation.org,
	n-horiguchi@...jp.nec.com, linux-kernel@...r.kernel.org,
	Gavin Guo <gavin.guo@...onical.com>
Subject: Re: [PATCH] mm: mempolicy: skip non-migratable VMAs when setting
 MPOL_MF_LAZY

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On 01/06/2016 09:18 AM, Liang Chen wrote:
> MPOL_MF_LAZY is not visible from userspace since 'commit
> a720094ded8c ("mm: mempolicy: Hide MPOL_NOOP and MPOL_MF_LAZY from
> userspace for now")' , but it should still skip non-migratable
> VMAs.

The changelog could use a better description of exactly
what the issue is, and why calling change_prot_numa
on a non-migratable VMA is causing problems.

> Signed-off-by: Liang Chen <liangchen.linux@...il.com> 
> Signed-off-by: Gavin Guo <gavin.guo@...onical.com>

For the code itself:

Acked-by: Rik van Riel <riel@...hat.com>

Please resubmit with a better changelog.
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