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Date:	Sat, 04 Jan 2014 11:31:47 +0800
From:	Bob Liu <>
To:	Linus Torvalds <>
CC:	Sasha Levin <>,
	Andrew Morton <>,
	Wanpeng Li <>,
	Vlastimil Babka <>,
	Michel Lespinasse <>,
	Nick Piggin <>,
	KOSAKI Motohiro <>,
	Rik van Riel <>,
	David Rientjes <>,
	Mel Gorman <>, Minchan Kim <>,
	Hugh Dickins <>,
	Johannes Weiner <>,
	linux-mm <>,
	Linux Kernel Mailing List <>
Subject: Re: [PATCH] mm/mlock: fix BUG_ON unlocked page for nolinear VMAs

On 01/04/2014 04:52 AM, Linus Torvalds wrote:
> On Fri, Jan 3, 2014 at 12:17 PM, Sasha Levin <> wrote:
>> Ping? This BUG() is triggerable in 3.13-rc6 right now.
> So Andrew suggested just removing the BUG_ON(), but it's been there
> for a *long* time.
> And I detest the patch that was sent out that said "Should I check?"
> Maybe we should just remove that mlock_vma_page() thing instead in
> try_to_unmap_cluster()? Or maybe actually lock the page around calling

I didn't get the reason why we have to call mlock_vma_page() in
try_to_unmap_cluster() and I agree to just remove it.

> it?
>              Linus

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