Re: [RFC][PATCH 3/5] add /dev/mem_notify device

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From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...>

To: KOSAKI Motohiro <kosaki.motohiro@...>

Cc: <linux-mm@...>, <linux-kernel@...>, Marcelo Tosatti <marcelo@...>, Daniel Spang <daniel.spang@...>, Rik van Riel <riel@...>, Andrew Morton <akpm@...>

Subject: Re: [RFC][PATCH 3/5] add /dev/mem_notify device

Date: Monday, January 14, 2008 - 10:10 pm

On Tue, 15 Jan 2008 10:01:21 +0900
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> wrote:

quoted text> +	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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Messages in current thread:

[RFC][PATCH 0/5] mem notifications v4, KOSAKI Motohiro, (Mon Jan 14, 8:52 pm)

[RFC][PATCH 5/5] /proc/zoneinfo enhancement, KOSAKI Motohiro, (Mon Jan 14, 9:03 pm)

Re: [RFC][PATCH 5/5] /proc/zoneinfo enhancement, Alan Cox, (Tue Jan 15, 6:44 am)

Re: [RFC][PATCH 5/5] /proc/zoneinfo enhancement, KOSAKI Motohiro, (Tue Jan 15, 6:49 am)

[RFC][PATCH 4/5] memory_pressure_notify() caller, KOSAKI Motohiro, (Mon Jan 14, 9:02 pm)

Re: [RFC][PATCH 4/5] memory_pressure_notify() caller, Daniel Spång, (Tue Jan 15, 6:55 pm)

Re: [RFC][PATCH 4/5] memory_pressure_notify() caller, Rik van Riel, (Tue Jan 15, 6:59 pm)

Re: [RFC][PATCH 4/5] memory_pressure_notify() caller, Daniel Spång, (Tue Jan 15, 7:39 pm)

Re: [RFC][PATCH 4/5] memory_pressure_notify() caller, KOSAKI Motohiro, (Tue Jan 15, 9:48 pm)

Re: [RFC][PATCH 4/5] memory_pressure_notify() caller, Daniel Spång, (Wed Jan 16, 7:03 am)

Re: [RFC][PATCH 4/5] memory_pressure_notify() caller, KOSAKI Motohiro, (Wed Jan 16, 11:26 pm)

Re: [RFC][PATCH 4/5] memory_pressure_notify() caller, Daniel Spång, (Fri Jan 18, 6:24 am)

Re: [RFC][PATCH 4/5] memory_pressure_notify() caller, KOSAKI Motohiro, (Fri Jan 18, 6:30 am)

Re: [RFC][PATCH 4/5] memory_pressure_notify() caller, KAMEZAWA Hiroyuki, (Mon Jan 14, 10:06 pm)

Re: [RFC][PATCH 4/5] memory_pressure_notify() caller, KOSAKI Motohiro, (Mon Jan 14, 10:37 pm)

Re: [RFC][PATCH 4/5] memory_pressure_notify() caller, KAMEZAWA Hiroyuki, (Mon Jan 14, 11:00 pm)

Re: [RFC][PATCH 4/5] memory_pressure_notify() caller, KOSAKI Motohiro, (Mon Jan 14, 11:08 pm)

[RFC][PATCH 3/5] add /dev/mem_notify device, KOSAKI Motohiro, (Mon Jan 14, 9:01 pm)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, Pavel Machek, (Tue Jan 15, 6:16 pm)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, KOSAKI Motohiro, (Tue Jan 15, 9:57 pm)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, Marcelo Tosatti, (Wed Jan 16, 12:13 am)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, Pavel Machek, (Wed Jan 16, 7:42 am)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, Daniel Spång, (Wed Jan 16, 7:51 am)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, KOSAKI Motohiro, (Wed Jan 16, 11:04 pm)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, Alan Cox, (Tue Jan 15, 6:46 am)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, KOSAKI Motohiro, (Tue Jan 15, 6:59 am)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, Alan Cox, (Tue Jan 15, 7:20 am)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, Marcelo Tosatti, (Tue Jan 15, 8:05 am)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, Alan Cox, (Tue Jan 15, 9:42 am)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, KOSAKI Motohiro, (Tue Jan 15, 7:48 am)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, Alan Cox, (Tue Jan 15, 9:42 am)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, KOSAKI Motohiro, (Tue Jan 15, 10:43 pm)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, KAMEZAWA Hiroyuki, (Mon Jan 14, 10:10 pm)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, KOSAKI Motohiro, (Mon Jan 14, 10:20 pm)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, Rik van Riel, (Mon Jan 14, 10:56 pm)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, Randy Dunlap, (Mon Jan 14, 9:08 pm)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, KOSAKI Motohiro, (Mon Jan 14, 9:20 pm)

Re: [RFC][PATCH 3/5] add /dev/mem_notify device, KOSAKI Motohiro, (Mon Jan 14, 9:24 pm)

[RFC][PATCH 2/5] introduce wake_up_locked_nr() new API, KOSAKI Motohiro, (Mon Jan 14, 9:00 pm)

[RFC][PATCH 1/5] introduce poll_wait_exclusive() new API , KOSAKI Motohiro, (Mon Jan 14, 8:59 pm)

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