linux-kernel - Re: [PATCH 3/3] tools/vm/slabinfo: update struct slabinfo members' types

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Message-ID: <20151112011347.GC1651@swordfish>
Date:	Thu, 12 Nov 2015 10:13:47 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	Joonsoo Kim <iamjoonsoo.kim@....com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Subject: Re: [PATCH 3/3] tools/vm/slabinfo: update struct slabinfo members'
 types

On (11/11/15 12:55), David Rientjes wrote:
[..]
> >  	/* Object size */
> > -	unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
> > +	unsigned int min_objsize = UINT_MAX, max_objsize = 0, avg_objsize;
> >  
> >  	/* Number of partial slabs in a slabcache */
> >  	unsigned long long min_partial = max, max_partial = 0,
> 
> avg_objsize should not be unsigned int.

Hm. the assumption is that `avg_objsize' cannot be larger
than `max_objsize', which is
	`int object_size;' in `struct kmem_cache' from slab_def.h
and
	`unsigned int object_size;' in `struct kmem_cache' from slab.h.


 avg_objsize = total_used / total_objects;


	-ss
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