Re: [PATCH] binder: Use kmem_cache for binder_thread

Greg KH
2019-08-29T06:42:34Z

On Thu, Aug 29, 2019 at 01:49:53PM +0800, Peikan Tsai wrote:
> Hi,

No need for that in a changelog text :)

> The allocated size for each binder_thread is 512 bytes by kzalloc.
> Because the size of binder_thread is fixed and it's only 304 bytes.
> It will save 208 bytes per binder_thread when use create a kmem_cache
> for the binder_thread.

Are you _sure_ it really will save that much memory? You want to do
allocations based on a nice alignment for lots of good reasons,
especially for something that needs quick accesses.

Did you test your change on a system that relies on binder and find any
speed improvement or decrease, and any actual memory savings?

If so, can you post your results?

thanks,

greg k-h