linux-kernel - Re: [PATCH] mm,numa,THP: initialize hstate for THP page size

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Message-ID: <52B30E48.9070505@redhat.com>
Date:	Thu, 19 Dec 2013 10:18:32 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Michal Hocko <mhocko@...e.cz>
CC:	Dave Hansen <dave.hansen@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Chao Yang <chayang@...hat.com>,
	linux-mm@...ck.org, aarcange@...hat.com, mgorman@...e.de,
	Veaceslav Falico <vfalico@...hat.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	David Rientjes <rientjes@...gle.com>,
	Michel Lespinasse <walken@...gle.com>
Subject: Re: [PATCH] mm,numa,THP: initialize hstate for THP page size

On 12/19/2013 05:22 AM, Michal Hocko wrote:
> [Adding Dave and Mel]

> copy_huge_page as hugetlb specific thing. It relies on hstate which is
> obviously not existing for THP pages. So why do we use it for thp pages
> in the first place?
> 
> Mel, your "mm: numa: Add THP migration for the NUMA working set scanning
> fault case." has added check for PageTransHuge in migrate_page_copy so
> it uses the shared copy_huge_page now. Dave has already tried to fix it
> by https://lkml.org/lkml/2013/10/28/592 but this one has been dropped
> later with "to-be-updated".
> 
> Dave do you have an alternative for your patch?

Gah, never mind me.  This oops happened on a slightly older tree,
that did not have Dave's patch yet...

Andrew, you can drop the patch. Sorry for the noise.

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