Re: [PATCH] jump_label: jump_label for boot options.

[Jason Baron]

On Thu, Dec 01, 2011 at 11:53:53AM +0900, KAMEZAWA Hiroyuki wrote:
> I tried to use jump_label for handling memcg's boot options which sets
> global variable true/false and never changes after boot. And found jump_table
> is larger than expected. This patch is a trial to allow to place jump_table
> in .init section. How do you think ?
> 

Remeber too, that 'static_branch()' is inherently biased. That is, the
'false' path is assumed to be the the most likely path. Thus, the 'true'
path is move out-of-line. Thus, if the 'true' branch is potentially
used all the time, we would want to make sure that the savings of not
having to check a variable is still worth it. I should probably rename
static_branch() -> 'static_branch_default_false()' to make that clear.

Maybe we need an unbiased static_branch() too, but I'm not sure excatly
how to implement it...

Thanks,

-Jason
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/