On Sun, 31 Oct 2010, Ben Gamari wrote:
> This will allow distributions to tune this important vm parameter in a more
> self-contained manner.
>
> Signed-off-by: Ben Gamari <[email protected]>
> ---
> Documentation/sysctl/vm.txt | 2 +-
> mm/Kconfig | 11 +++++++++++
> mm/vmscan.c | 2 +-
> 3 files changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt
> index 6c7d18c..792823b 100644
> --- a/Documentation/sysctl/vm.txt
> +++ b/Documentation/sysctl/vm.txt
> @@ -614,7 +614,7 @@ This control is used to define how aggressive the kernel will swap
> memory pages. Higher values will increase agressiveness, lower values
> decrease the amount of swap.
>
> -The default value is 60.
> +The default value is 60 (changed with CONFIG_DEFAULT_SWAPINESS).
>
> ==============================================================
>
> diff --git a/mm/Kconfig b/mm/Kconfig
> index 9c61158..729ecec 100644
> --- a/mm/Kconfig
> +++ b/mm/Kconfig
> @@ -61,6 +61,17 @@ config SPARSEMEM_MANUAL
>
> endchoice
>
> +config DEFAULT_SWAPPINESS
> + int "Default swappiness"
> + default "60"
> + range 0 100
> + help
> + This control is used to define how aggressive the kernel will swap
> + memory pages. Higher values will increase agressiveness, lower
> + values decrease the amount of swap. Valid values range from 0 to 100.
> +
> + If unsure, keep default value of 60.
> +
Perhaps this help text should mention the fact that swapiness setting can
be changed at runtime (regardless of the set default) by writing to
/proc/sys/vm/swappiness ???
--
Jesper Juhl <[email protected]> http://www.chaosbits.net/
Plain text mails only, please http://www.expita.com/nomime.html
Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
On Mon, 1 Nov 2010 21:09:58 +0100 (CET), Jesper Juhl <[email protected]> wrote:
> Perhaps this help text should mention the fact that swapiness setting can
> be changed at runtime (regardless of the set default) by writing to
> /proc/sys/vm/swappiness ???
>
This definitely wouldn't hurt. I'll respin with updated help text.
- Ben
On Mon, Nov 01, 2010 at 04:41:35PM -0400, Ben Gamari wrote:
> On Mon, 1 Nov 2010 21:09:58 +0100 (CET), Jesper Juhl <[email protected]> wrote:
> > Perhaps this help text should mention the fact that swapiness setting can
> > be changed at runtime (regardless of the set default) by writing to
> > /proc/sys/vm/swappiness ???
> >
> This definitely wouldn't hurt. I'll respin with updated help text.
Acked-by: Wu Fengguang <[email protected]>