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Re: [RFC][PATCH] memory controller per zone patches take 2 [4/10] calculate mapped ratio for memory [message #23484 is a reply to message #23461]

Mon, 19 November 2007 01:41

KAMEZAWA Hiroyuki
Messages: 463
Registered: September 2006

Senior Member

On Sat, 17 Nov 2007 21:42:06 +0530
Balbir Singh <balbir@linux.vnet.ibm.com> wrote:

> KAMEZAWA Hiroyuki wrote:
> > Define function for calculating mapped_ratio in memory cgroup.
> > 
> 
> Could you explain what the ratio is used for? Is it for reclaim
> later?
> 
Yes, for later.


> > +	/* usage is recorded in bytes */
> > +	total = mem->res.usage >> PAGE_SHIFT;
> > +	rss = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_RSS);
> > +	return (rss * 100) / total;
> 
> Never tried 64 bit division on a 32 bit system. I hope we don't
> have to resort to do_div() sort of functionality.
> 
Hmm, maybe it's better to make these numebrs be just "long".
I'll try to change per-cpu-counter implementation.

Thanks,
-Kame

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[Message index]

		[RFC][PATCH] memory controller per zone patches take 2 [0/10] introduction By: KAMEZAWA Hiroyuki on Fri, 16 November 2007 10:11
		[RFC][PATCH] memory controller per zone patches take 2 [1/10] add scan_global_lru() macro By: KAMEZAWA Hiroyuki on Fri, 16 November 2007 10:14
		Re: [RFC][PATCH] memory controller per zone patches take 2 [1/10] add scan_global_lru() macro By: Balbir Singh on Sat, 17 November 2007 09:03
		[RFC][PATCH] memory controller per zone patches take 2 [2/10] add nid/zid function for page_cgroup By: KAMEZAWA Hiroyuki on Fri, 16 November 2007 10:15
		Re: [RFC][PATCH] memory controller per zone patches take 2 [2/10] add nid/zid function for page_cgro By: Balbir Singh on Sat, 17 November 2007 09:15
		Re: [RFC][PATCH] memory controller per zone patches take 2 [2/10] add nid/zid function for page_cgro By: KAMEZAWA Hiroyuki on Mon, 19 November 2007 01:37
		[RFC][PATCH] memory controller per zone patches take 2 [3/10] add per zone active/inactive counter t By: KAMEZAWA Hiroyuki on Fri, 16 November 2007 10:17
		Re: [RFC][PATCH] memory controller per zone patches take 2 [3/10] add per zone active/inactive count By: Balbir Singh on Sat, 17 November 2007 16:07
		[RFC][PATCH] memory controller per zone patches take 2 [4/10] calculate mapped ratio for memory cgro By: KAMEZAWA Hiroyuki on Fri, 16 November 2007 10:17
		Re: [RFC][PATCH] memory controller per zone patches take 2 [4/10] calculate mapped ratio for memory By: Balbir Singh on Sat, 17 November 2007 16:12
		Re: [RFC][PATCH] memory controller per zone patches take 2 [4/10] calculate mapped ratio for memory By: KAMEZAWA Hiroyuki on Mon, 19 November 2007 01:41
		Re: [RFC][PATCH] memory controller per zone patches take 2 [4/10] calculate mapped ratio for memory By: yamamoto on Thu, 22 November 2007 08:34
		Re: [RFC][PATCH] memory controller per zone patches take 2 [4/10] calculate mapped ratio for memory By: KAMEZAWA Hiroyuki on Thu, 22 November 2007 08:40
		Re: [RFC][PATCH] memory controller per zone patches take 2 [4/10] calculate mapped ratio for memory By: yamamoto on Thu, 22 November 2007 08:46
		Re: Re: [RFC][PATCH] memory controller per zone patches take 2 [4/10] calculate mapped ratio for mem By: KAMEZAWA Hiroyuki on Thu, 22 November 2007 13:31
		[RFC][PATCH] memory controller per zone patches take 2 [5/10] calculate active/inactive balance for By: KAMEZAWA Hiroyuki on Fri, 16 November 2007 10:21
		[RFC][PATCH] memory controller per zone patches take 2 [7/10] calculate reclaim scan number for memo By: KAMEZAWA Hiroyuki on Fri, 16 November 2007 10:24
		[RFC][PATCH] memory controller per zone patches take 2 [8/10] changes in vmscan.c By: KAMEZAWA Hiroyuki on Fri, 16 November 2007 10:25
		Re: [RFC][PATCH] memory controller per zone patches take 2 [8/10] changes in vmscan.c By: Balbir Singh on Sat, 17 November 2007 17:37
		[RFC][PATCH] memory controller per zone patches take 2 [9/10] per-zone-lru for memory cgroup By: KAMEZAWA Hiroyuki on Fri, 16 November 2007 10:25
		Re: [RFC][PATCH] memory controller per zone patches take 2 [9/10] per-zone-lru for memory cgroup By: Balbir Singh on Sat, 17 November 2007 17:51
		Re: [RFC][PATCH] memory controller per zone patches take 2 [9/10] per-zone-lru for memory cgroup By: KAMEZAWA Hiroyuki on Mon, 19 November 2007 01:47
		Re: [RFC][PATCH] memory controller per zone patches take 2 [9/10] per-zone-lru for memory cgroup By: Balbir Singh on Mon, 19 November 2007 06:21
		Re: [RFC][PATCH] memory controller per zone patches take 2 [9/10] per-zone-lru for memory cgroup By: KAMEZAWA Hiroyuki on Mon, 19 November 2007 06:35
		Re: [RFC][PATCH] memory controller per zone patches take 2 [9/10] per-zone-lru for memory cgroup By: Balbir Singh on Mon, 19 November 2007 08:34
		[RFC][PATCH] memory controller per zone patches take 2 [10/10] per-zone-lock for memory cgroup By: KAMEZAWA Hiroyuki on Fri, 16 November 2007 10:27
		[RFC][PATCH] memory controller per zone patches take 2 [6/10] remember reclaim priority for memory c By: KAMEZAWA Hiroyuki on Fri, 16 November 2007 10:23

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