Re: [PATCH v2 2/2] mm, slab: Show last shrink time in us when slab/shrink is read

From: Christopher Lameter
Date: Thu Jul 18 2019 - 07:39:35 EST

On Wed, 17 Jul 2019, Waiman Long wrote:

> The show method of /sys/kernel/slab/<slab>/shrink sysfs file currently
> returns nothing. This is now modified to show the time of the last
> cache shrink operation in us.

What is this useful for? Any use cases?

> CONFIG_SLUB_DEBUG depends on CONFIG_SYSFS. So the new shrink_us field
> is always available to the shrink methods.

Aside from minimal systems without CONFIG_SYSFS... Does this build without