linux-kernel - Re: [PATCH v6 0/5] zram/zsmalloc promotion

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Message-ID: <CAA_GA1da3jkOO9Y3+L6_DMmiH8wsbJJ-xcUxUK_Gh2SYPPbjoA@mail.gmail.com>
Date:	Thu, 15 Aug 2013 08:18:46 +0800
From:	Bob Liu <lliubbo@...il.com>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Luigi Semenzato <semenzato@...gle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <axboe@...nel.dk>,
	Seth Jennings <sjenning@...ux.vnet.ibm.com>,
	Nitin Gupta <ngupta@...are.org>,
	Konrad Rzeszutek Wilk <konrad@...nok.org>,
	Linux-Kernel <linux-kernel@...r.kernel.org>,
	Linux-MM <linux-mm@...ck.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Mel Gorman <mgorman@...e.de>
Subject: Re: [PATCH v6 0/5] zram/zsmalloc promotion

On Thu, Aug 15, 2013 at 12:17 AM, Minchan Kim <minchan@...nel.org> wrote:
> Hi Luigi,
>
> On Wed, Aug 14, 2013 at 08:53:31AM -0700, Luigi Semenzato wrote:
>> During earlier discussions of zswap there was a plan to make it work
>> with zsmalloc as an option instead of zbud. Does zbud work for
>
> AFAIR, it was not an optoin but zsmalloc was must but there were
> several objections because zswap's notable feature is to dump
> compressed object to real swap storage. For that, zswap needs to
> store bounded objects in a zpage so that dumping could be bounded, too.
> Otherwise, it could encounter OOM easily.
>

AFAIR, the next step of zswap should be have a modular allocation layer so that
users can choose zsmalloc or zbud to use.

Seth?

-- 
Regards,
--Bob
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