Re: [PATCH 1/3] Add a new field to struct shrinker

[Michal Hocko <mhocko@kernel.org>]

On Sat 09-07-16 04:43:31, Janani Ravichandran wrote:
> Struct shrinker does not have a field to uniquely identify the shrinkers
> it represents. It would be helpful to have a new field to hold names of
> shrinkers. This information would be useful while analyzing their
> behavior using tracepoints.

This will however increase the vmlinux size even when no tracing is
enabled. Why cannot we simply print the name of the shrinker callbacks?

> 
> ---
>  include/linux/shrinker.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h
> index 4fcacd9..431125c 100644
> --- a/include/linux/shrinker.h
> +++ b/include/linux/shrinker.h
> @@ -52,6 +52,7 @@ struct shrinker {
>  	unsigned long (*scan_objects)(struct shrinker *,
>  				      struct shrink_control *sc);
>  
> +	const char *name;
>  	int seeks;	/* seeks to recreate an obj */
>  	long batch;	/* reclaim batch size, 0 = default */
>  	unsigned long flags;
> -- 
> 2.7.0
> 
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@kvack.org.  For more info on Linux MM,
> see: http://www.linux-mm.org/ .
> Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

-- 
Michal Hocko
SUSE Labs