Re: [PATCH v6 07/11] VFS hot tracking: Add a /proc interface to control memory usage

Dave Hansen
2013-11-11T22:16:01Z

On 11/06/2013 05:45 AM, Zhi Yong Wu wrote:
> Introduce a /proc interface hot-mem-high-thresh and
> to cap the memory which is consumed by hot_inode_item
> and hot_range_item, and they will be in the unit of
> 1M bytes.

You don't seem to have any documentation for this, btw... :(

> + .procname = "hot-mem-high-thresh",

*Always* put units on these. I know you mention it in a code comment,
but please also include it in the proc filename too.

In general, why do you have to control the number of these statically?
Shouldn't you just define a shrinker and let memory pressure determine
how many of these we allow to exist?