RE: [PATCH -v2 -mm] add extra free kbytes tunable

[Satoru Moriya]

On 10/13/2011 01:35 AM, KAMEZAWA Hiroyuki wrote:
> 
> I don't read full story but....how about adding a new syscall like
> 
> ==
> sys_mem_shrink(int nid, int nr_scan_pages, int flags)
> 
> This system call scans LRU of specified nodes and free pages on LRU.
> This scan nr_scan_pages in LRU and returns the number of successfully
> freed pages.
> ==
> 
> Then, running this progam in SCHED_IDLE, a user can make free pages while
> the system is idle. If running in the highest priority, a user can keep
> free pages as he want. If a user run this under a memcg, user can free
> pages in a memcg. 

This is interesting. We can make userspace kswapd as we like with
this syscall. But it seems harder to be accepted...

Regards,
Satoru--
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