linux-kernel - Re: [PATCH v2 6/6] add documentation on proc.txt

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Message-Id: <1366786185.18069.160@driftwood>
Date:	Wed, 24 Apr 2013 01:49:45 -0500
From:	Rob Landley <rob@...dley.net>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Rik van Riel <riel@...hat.com>,
	Dave Hansen <dave.hansen@...el.com>,
	Minchan Kim <minchan@...nel.org>
Subject: Re: [PATCH v2 6/6] add documentation on proc.txt

On 04/23/2013 08:41:04 PM, Minchan Kim wrote:
> This patch adds stuff about new reclaim field in proc.txt
> 
> Cc: Rob Landley <rob@...dley.net>
> Signed-off-by: Minchan Kim <minchan@...nel.org>
> ---
> 
> Rob, I didn't add your Acked-by because interface was slight changed.
> I hope you give Acke-by after review again.
> Thanks.
> 
>  Documentation/filesystems/proc.txt | 22 ++++++++++++++++++++++
>  mm/Kconfig                         |  7 +------
>  2 files changed, 23 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/filesystems/proc.txt  
> b/Documentation/filesystems/proc.txt
> index 488c094..1411ad0 100644
> --- a/Documentation/filesystems/proc.txt
> +++ b/Documentation/filesystems/proc.txt
> @@ -136,6 +136,7 @@ Table 1-1: Process specific entries in /proc
>   maps		Memory maps to executables and library files	 
> (2.4)
>   mem		Memory held by this process
>   root		Link to the root directory of this process
> + reclaim	Reclaim pages in this process
>   stat		Process status
>   statm		Process memory status information
>   status		Process status in human readable form
> @@ -489,6 +490,27 @@ To clear the soft-dirty bit
> 
>  Any other value written to /proc/PID/clear_refs will have no effect.
> 
> +The file /proc/PID/reclaim is used to reclaim pages in this process.
> +To reclaim file-backed pages,
> +    > echo file > /proc/PID/reclaim
> +
> +To reclaim anonymous pages,
> +    > echo anon > /proc/PID/reclaim
> +
> +To reclaim all pages,
> +    > echo all > /proc/PID/reclaim
> +
> +Also, you can specify address range of process so part of address  
> space
> +will be reclaimed. The format is following as
> +    > echo addr size-byte > /proc/PID/reclaim
> +
> +NOTE: addr should be page-aligned.

And size in bytes should be a multiple of page size?

> +
> +Below is example which try to reclaim 2 pages from 0x100000.
> +
> +To reclaim both pages in address range,
> +    > echo $((1<<20) 8192 > /proc/PID/reclaim

Would you like to balance your parentheses?

Acked-by: Rob Landley <rob@...dley.net>

Rob--
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