linux-kernel - Re: [PATCH 08/12] vmscan: Setup pagevec as late as possible in shrink_inactive

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Message-ID: <20100615104701.GA31051@infradead.org>
Date:	Tue, 15 Jun 2010 06:47:01 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Mel Gorman <mel@....ul.ie>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org, Dave Chinner <david@...morbit.com>,
	Chris Mason <chris.mason@...cle.com>,
	Nick Piggin <npiggin@...e.de>, Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Christoph Hellwig <hch@...radead.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 08/12] vmscan: Setup pagevec as late as possible in
 shrink_inactive_list()

On Mon, Jun 14, 2010 at 12:17:49PM +0100, Mel Gorman wrote:
>  /*
> + * TODO: Try merging with migrations version of putback_lru_pages
> + */
> +static noinline_for_stack void putback_lru_pages(struct zone *zone,
> +				struct zone_reclaim_stat *reclaim_stat,
> +				unsigned long nr_anon, unsigned long nr_file,
> + 				struct list_head *page_list)
> +{

I hate to nitpick on this, but with noinline_for_stack a prototype
really is unreadbale unless the function identifier goes to the next
line.  Compare the one above with:

static noinline_for_stack void
putback_lru_pages(struct zone *zone, struct zone_reclaim_stat *reclaim_stat,
		unsigned long nr_anon, unsigned long nr_file,
		struct list_head *page_list)

> -static unsigned long shrink_inactive_list(unsigned long nr_to_scan,
> +static noinline_for_stack unsigned long shrink_inactive_list(unsigned long nr_to_scan,
>  			struct zone *zone, struct scan_control *sc,
>  			int priority, int file)

Same here, just even worse due to the spill over ove 80 characters.

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