linux-kernel - Re: [PATCH v2 7/7] zsmalloc: add fullness into stat

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Message-Id: <20150304165610.5befcdbf2573c66509e77b55@linux-foundation.org>
Date:	Wed, 4 Mar 2015 16:56:10 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Minchan Kim <minchan@...nel.org>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Juneho Choi <juno.choi@....com>, Gunho Lee <gunho.lee@....com>,
	Luigi Semenzato <semenzato@...gle.com>,
	Dan Streetman <ddstreet@...e.org>,
	Seth Jennings <sjennings@...iantweb.net>,
	Nitin Gupta <ngupta@...are.org>,
	Jerome Marchand <jmarchan@...hat.com>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	opensource.ganesh@...il.com
Subject: Re: [PATCH v2 7/7] zsmalloc: add fullness into stat

On Thu, 5 Mar 2015 09:43:31 +0900 Minchan Kim <minchan@...nel.org> wrote:

> Hello Andrew,
> 
> On Wed, Mar 04, 2015 at 02:02:02PM -0800, Andrew Morton wrote:
> > On Wed,  4 Mar 2015 14:01:32 +0900 Minchan Kim <minchan@...nel.org> wrote:
> > 
> > > +static int zs_stats_size_show(struct seq_file *s, void *v)
> > > +{
> > > +	int i;
> > > +	struct zs_pool *pool = s->private;
> > > +	struct size_class *class;
> > > +	int objs_per_zspage;
> > > +	unsigned long class_almost_full, class_almost_empty;
> > > +	unsigned long obj_allocated, obj_used, pages_used;
> > > +	unsigned long total_class_almost_full = 0, total_class_almost_empty = 0;
> > > +	unsigned long total_objs = 0, total_used_objs = 0, total_pages = 0;
> > > +
> > > +	seq_printf(s, " %5s %5s %11s %12s %13s %10s %10s %16s\n",
> > > +			"class", "size", "almost_full", "almost_empty",
> > > +			"obj_allocated", "obj_used", "pages_used",
> > > +			"pages_per_zspage");
> > 
> > Documentation?
> 
> It should been since [0f050d9, mm/zsmalloc: add statistics support].
> Anyway, I will try it.
> Where is right place to put only this statistics in Documentation?
> 
> Documentation/zsmalloc.txt?
> Documentation/vm/zsmalloc.txt?
> Documentation/blockdev/zram.txt?
> Documentation/ABI/testing/sysfs-block-zram?

hm, this is debugfs so Documentation/ABI/testing/sysfs-block-zram isn't
the right place.

akpm3:/usr/src/25> grep -rli zsmalloc Documentation 
akpm3:/usr/src/25> 

lol.

Documentation/vm/zsmalloc.txt looks good.
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