[yocto] Accelerate kernel module built in eSDK?

[richard.purdie at linuxfoundation.org]

On Fri, 2018-12-28 at 18:19 +0800, Zhaolong Zhang wrote:
> Hi Experts,
> 
> Building out-of-tree kernel modules in eSDK will trigger a new
> rebuilding of kernel, which consumes lots of time.
> Is it possible to cache the do_shared_workdir() task in sstate-cache
> and ship it within eSDK? And how?
> 
> Or is there other method to accelerate?
> 
> Thanks in advance.

It is possible but it means creating a tarball of all the kernel source
and build artefacts. Usually its just as quick to extract new kernel
source and build it than it is to store this and extract it. The sstate
object would be huge.

Cheers,

Richard