linux-kernel - Re: [RFC 2/2] Prevent promotion of page in madvise

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Message-ID: <87tyjavdn2.fsf@gmail.com>
Date:	Sun, 21 Nov 2010 11:34:57 -0500
From:	Ben Gamari <bgamari@...il.com>
To:	Minchan Kim <minchan.kim@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-mm <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
	Minchan Kim <minchan.kim@...il.com>,
	Rik van Riel <riel@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Nick Piggin <npiggin@...nel.dk>
Subject: Re: [RFC 2/2] Prevent promotion of page in madvise_dontneed

On Sun, 21 Nov 2010 23:30:24 +0900, Minchan Kim <minchan.kim@...il.com> wrote:
> Now zap_pte_range alwayas promotes pages which are pte_young &&
> !VM_SequentialReadHint(vma). But in case of calling MADV_DONTNEED,
> it's unnecessary since the page wouldn't use any more.
> 
Is this not against master? If it is, I think you might have forgotten
to update the zap_page_range() reference on mm/memory.c:1226 (in
zap_vma_ptes()). Should promote be true or false in this case? Cheers,

- Ben
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