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From: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
	Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Sangseok Lee <sangseok.lee@lge.com>,
	Chanho Min <chanho.min@lge.com>,
	Chan Gyun Jeong <chan.jeong@lge.com>
Subject: Re: [PATCH] mm: add NR_ZSMALLOC to vmstat
Date: Thu, 9 Jun 2016 10:40:52 +0900
Message-ID: <20160609014052.GA655@swordfish> (raw)
In-Reply-To: <20160607014340.GB26230@bbox>

Hello Minchan,

On (06/07/16 10:43), Minchan Kim wrote:
[..]
> > > It doesn't support per-zone stat which is important to show
> > > the fragmentation of the zone, for exmaple.
> > 
> > Ah, I see.
> > 
> > *just an idea*
> > 
> > may be zbud and z3fold folks will be interested as well, so may
> 
> First motivation of stat came from fragmentation problem from zsmalloc
> which caused by storing many thin zpages in a pageframe and across two
> pageframes while zswap limits the limitation by design.
> 
> Second motivation is zsmalloc can allocate page from HIGH/movable zones
> so I want to know how distribution zsmalloced pages is.
> However, zbud doesn't.

good points.
well, my "motivation" was "on 64-bit systems high zone is empty,
so those are zones below the high zone that we are interested in".

[..]
> > be more generic name and define... um, my head doesn't work toay..
> > ZALLOC... ZPOOLALLOC... hm.. I think you got the idea.
> 
> Having said that, generic name is better rather than zsmalloc. Thanks.
> I want to use *zspage* which is term from the beginning of zprojects. :)

thanks!

	-ss

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Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-03  2:08 Minchan Kim
2016-06-03  8:01 ` Sergey Senozhatsky
2016-06-03  8:23   ` Minchan Kim
2016-06-03 10:24     ` Sergey Senozhatsky
2016-06-07  1:43       ` Minchan Kim
2016-06-09  1:40         ` Sergey Senozhatsky [this message]

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