linux-kernel - Re: [RFC][PATCH 03/10] zsmalloc: introduce zs_can

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Message-ID: <20150604041911.GI1951@swordfish>
Date:	Thu, 4 Jun 2015 13:19:11 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH 03/10] zsmalloc: introduce zs_can_compact() function

On (06/04/15 12:50), Minchan Kim wrote:
> > On (06/04/15 12:30), Minchan Kim wrote:
> > > 
> > > What scenario do you have a cocern?
> > > Could you describe this example more clear?
> > 
> > you mean "how is this even possible"?
> 
> No I meant. I couldn't understand your terms. Sorry.
> 
> What free-objs class capacity is?
> page1 is zspage?
> 
> Let's use consistent terms between us.
> 
> For example, maxobj-per-zspage is 4.
> A is allocated and used. X is allocated but not used.
> so we can draw a zspage below.
> 
>         AAXX
> 
> So we can draw several zspages linked list as below
> 
> AAXX - AXXX - AAAX
> 
> Could you describe your problem again?
> 
> Sorry.

My apologies.

yes, so:
-- free-objs class capacity -- how may unused allocated objects
we have in this class (in total).
-- page1..pageN -- zspages.

And I think that my example is utterly wrong and incorrect. My mistake.
Sorry for the noise.

	-ss
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