linux-kernel - Re: UBIFS and page migration (take 3)

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Message-ID: <20160517091228.GB23943@infradead.org>
Date:	Tue, 17 May 2016 02:12:28 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Vlastimil Babka <vbabka@...e.cz>
Cc:	Richard Weinberger <richard@....at>,
	Christoph Hellwig <hch@...radead.org>,
	linux-fsdevel@...r.kernel.org, linux-mtd@...ts.infradead.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	boris.brezillon@...e-electrons.com,
	maxime.ripard@...e-electrons.com, david@...ma-star.at,
	david@...morbit.com, dedekind1@...il.com, alex@...tthing.co,
	akpm@...ux-foundation.org, sasha.levin@...cle.com,
	iamjoonsoo.kim@....com, rvaswani@...eaurora.org,
	tony.luck@...el.com, shailendra.capricorn@...il.com,
	kirill.shutemov@...ux.intel.com, hughd@...gle.com,
	mgorman@...hsingularity.net
Subject: Re: UBIFS and page migration (take 3)

On Mon, May 16, 2016 at 03:03:55PM +0200, Vlastimil Babka wrote:
> On 05/16/2016 02:44 PM, Richard Weinberger wrote:
> >MM folks, do we have a way to force page migration?
> 
> On NUMA we have migrate_pages(2).

Do we have existing sets of it?  Otherwise it would be good to find
a way to wire it up for xfstests so that we enforce migratepage
is called.  Once I get some time I'll see how often we end up
calling migratepage for a normal QA run.