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

Rob Landley
2013-04-24T06:49:50Z

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@landley.net>
> Signed-off-by: Minchan Kim <minchan@kernel.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@landley.net>

Rob