linux-kernel - Re: [PATCH mmotm] mm: introduce page_lru_base

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Message-ID: <20090826103358.GA26897@cmpxchg.org>
Date:	Wed, 26 Aug 2009 12:33:58 +0200
From:	Johannes Weiner <hannes@...xchg.org>
To:	Hugh Dickins <hugh.dickins@...cali.co.uk>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH mmotm] mm: introduce page_lru_base_type fix

On Wed, Aug 26, 2009 at 10:53:47AM +0100, Hugh Dickins wrote:
> My usual tmpfs swapping loads on recent mmotms have oddly
> aroused the OOM killer after an hour or two.  Bisection led to
> mm-return-boolean-from-page_is_file_cache.patch, but really it's
> the prior mm-introduce-page_lru_base_type.patch that's at fault.
> 
> It converted page_lru() to use page_lru_base_type(), but forgot
> to convert del_page_from_lru() - which then decremented the wrong
> stats once page_is_file_cache() was changed to a boolean.

Ouch, sorry.  Thanks for your fix.

> Fix that, move page_lru_base_type() before del_page_from_lru(),
> and mark it "inline" like the other mm_inline.h functions.

	Hannes
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