Re: [PATCH -mm -v3 1/6] mm, swap: Add swap cache statistics sysfs interface

[Rik van Riel]

On Tue, 2017-07-25 at 09:51 +0800, Huang, Ying wrote:
> From: Huang Ying <ying.huang@xxxxxxxxx>
> 
> The swap cache stats could be gotten only via sysrq, which isn't
> convenient in some situation.ÂÂSo the sysfs interface of swap cache
> stats is added for that.ÂÂThe added sysfs directories/files are as
> follow,
> 
> /sys/kernel/mm/swap
> /sys/kernel/mm/swap/cache_find_total
> /sys/kernel/mm/swap/cache_find_success
> /sys/kernel/mm/swap/cache_add
> /sys/kernel/mm/swap/cache_del
> /sys/kernel/mm/swap/cache_pages
> 
What is the advantage of this vs new fields in
/proc/vmstat, which is where most of the VM
statistics seem to live?

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