Date: Tue, 15 Jan 2008 11:10:35 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
       Marcelo Tosatti <marcelo@kvack.org>,
       Daniel Spang <daniel.spang@gmail.com>, Rik van Riel <riel@redhat.com>,
       Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [RFC][PATCH 3/5] add /dev/mem_notify device
Message-Id: <20080115111035.d516639a.kamezawa.hiroyu@jp.fujitsu.com>
In-Reply-To: <20080115100029.1178.KOSAKI.MOTOHIRO@jp.fujitsu.com>
References: <20080115092828.116F.KOSAKI.MOTOHIRO@jp.fujitsu.com>
	<20080115100029.1178.KOSAKI.MOTOHIRO@jp.fujitsu.com>
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On Tue, 15 Jan 2008 10:01:21 +0900
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> wrote:

> +	if (pressure) {
> +		nr_wakeup = max_t(int, atomic_read(&nr_watcher_task)>>4, 100);
> +		atomic_long_set(&last_mem_notify, jiffies);
> +		wake_up_locked_nr(&mem_wait, nr_wakeup);
> +	}
What is this for ? and Why ?
Are there too many waiters ?

Thanks
-Kame

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