Re: The swap partition's size is too big for BSP?

[Richard Purdie <richard.purdie@linuxfoundation.org>]

On Mon, 2011-07-04 at 13:35 +0800, Cui, Dexuan wrote:
> In meta/recipes-core/initrdscripts/files/init-install.sh, we have 
> 
> # 5% for the swap
> swap_ratio=5               # dexuan: this variable is not used at all!
> ...
> swap_size=$((disk_size*5/100)) 
> 
> This algorithm seems too wasty -- e.g., for a CrownBay box with a 160GB disk, we would create a 8GB swap partition while the box has only 1GB memory.
> 
> What's the proper swap size?
> This link http://www.cyberciti.biz/tips/linux-swap-space.html discussed this and I think the below algorithm seems suitable for us:
> 
> Systems with 2GB of ram or less require the same size of swap space
> Systems with 2GB to 4GB of ram require a minimum of 2GB of swap space 
> Systems with 4GB to 16GB of ram require a minimum of 4GB of swap space 
> Systems with 16GB to 64GB of ram require a minimum of 8GB of swap space 
> Systems with 64GB to 256GB of ram require a minimum of 16GB of swap space 
> 
> Any comment?

Looks like a much better idea to me, I'll take patches :)

For reference if you want to do suspend to disk (swap) you need a lot of
swap space btw. Still no where near that much though!

Cheers,

Richard