linux-kernel - Re: [PATCH 02/02] swapon: allow a more flexible swap discard policy

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Date:	Sun, 26 May 2013 12:32:17 -0400
From:	KOSAKI Motohiro <kosaki.motohiro@...il.com>
To:	Rafael Aquini <aquini@...hat.com>
CC:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	akpm@...ux-foundation.org, hughd@...gle.com, shli@...nel.org,
	kzak@...hat.com, jmoyer@...hat.com, kosaki.motohiro@...il.com,
	riel@...hat.com, lwoodman@...hat.com, mgorman@...e.de
Subject: Re: [PATCH 02/02] swapon: allow a more flexible swap discard policy

(5/26/13 12:31 AM), Rafael Aquini wrote:
> Introduce the necessary changes to swapon(8) allowing a sysadmin to leverage
> the new changes introduced to sys_swapon by "swap: discard while swapping
> only if SWAP_FLAG_DISCARD_PAGES", therefore allowing a more flexible set of
> choices when selection the discard policy for mounted swap areas.
> This patch introduces the following optional arguments to the already
> existent swapon(8) "--discard" option, in order to allow a discard type to 
> be selected at swapon time:
>  * once    : only single-time area discards are issued. (swapon)
>  * pages   : discard freed pages before they are reused.
> If no policy is selected both discard types are enabled. (default)
> 
> Signed-off-by: Rafael Aquini <aquini@...hat.com>

Acked-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>



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