linux-kernel - Re: [PATCH] zram: update zram to use zpool

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Message-ID: <20160615231732.GJ17127@bbox>
Date:	Thu, 16 Jun 2016 08:17:32 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Geliang Tang <geliangtang@...il.com>
CC:	Nitin Gupta <ngupta@...are.org>,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Dan Streetman <ddstreet@...e.org>,
	Vitaly Wool <vitalywool@...il.com>,
	<linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>
Subject: Re: [PATCH] zram: update zram to use zpool

On Wed, Jun 15, 2016 at 10:42:07PM +0800, Geliang Tang wrote:
> Change zram to use the zpool api instead of directly using zsmalloc.
> The zpool api doesn't have zs_compact() and zs_pool_stats() functions.
> I did the following two things to fix it.
> 1) I replace zs_compact() with zpool_shrink(), use zpool_shrink() to
>    call zs_compact() in zsmalloc.
> 2) The 'pages_compacted' attribute is showed in zram by calling
>    zs_pool_stats(). So in order not to call zs_pool_state() I move the
>    attribute to zsmalloc.
> 
> Signed-off-by: Geliang Tang <geliangtang@...il.com>

NACK.

I already explained why.
http://lkml.kernel.org/r/20160609013411.GA29779@bbox