linux-kernel - Re: [PATCH 6/7] hugetlb: hugepage migration core

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Message-ID: <alpine.DEB.2.00.1007061100530.4938@router.home>
Date:	Tue, 6 Jul 2010 11:02:04 -0500 (CDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
cc:	Andi Kleen <andi@...stfloor.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>,
	Wu Fengguang <fengguang.wu@...el.com>,
	"Jun'ichi Nomura" <j-nomura@...jp.nec.com>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 6/7] hugetlb: hugepage migration core

On Tue, 6 Jul 2010, Naoya Horiguchi wrote:

> Hmm, this chunk need to be fixed because I had too specific assumption.
> The list passed to migrate_pages() has only one page or one hugepage in
> page migration kicked by soft offline, but it's not the case in general case.
> Since hugepage is not linked to LRU list, we had better simply skip
> putback_lru_pages().

Maybe write a migrate_huge_page() function instead? The functionality is
materially different since we are not juggling things with the lru.

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