linux-kernel - Re: [PATCH] thp+memcg-numa: fix BUG at include/linux/mm.h:370!

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Message-ID: <AANLkTimEmv66taMnmNqTHHtoYu4bGAz3BRGbF0ncB40L@mail.gmail.com>
Date:	Tue, 15 Mar 2011 00:25:32 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Hugh Dickins <hughd@...gle.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH] thp+memcg-numa: fix BUG at include/linux/mm.h:370!

On Mon, Mar 14, 2011 at 5:08 PM, Hugh Dickins <hughd@...gle.com> wrote:
> THP's collapse_huge_page() has an understandable but ugly difference
> in when its huge page is allocated: inside if NUMA but outside if not.
> It's hardly surprising that the memcg failure path forgot that, freeing
> the page in the non-NUMA case, then hitting a VM_BUG_ON in get_page()
> (or even worse, using the freed page).
>
> Signed-off-by: Hugh Dickins <hughd@...gle.com>
Reviewed-by: Minchan Kim <minchan.kim@...il.com>

Thanks, Hugh.
-- 
Kind regards,
Minchan Kim
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