linux-kernel - Re: [PATCH 0/7] zram/zsmalloc promotion

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Message-ID: <20120821005617.GA14280@bbox>
Date:	Tue, 21 Aug 2012 09:56:17 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Nitin Gupta <ngupta@...are.org>,
	Andrew Morton <akpm@...ux-foundation.org>, axboe@...nel.dk
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Seth Jennings <sjenning@...ux.vnet.ibm.com>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Konrad Rzeszutek Wilk <konrad@...nok.org>
Subject: Re: [PATCH 0/7] zram/zsmalloc promotion

On Thu, Aug 16, 2012 at 10:47:58PM -0700, Nitin Gupta wrote:
> On 08/13/2012 11:22 PM, Minchan Kim wrote:
> > Hi Greg,
> > 
> > On Mon, Aug 13, 2012 at 07:35:30PM -0700, Greg Kroah-Hartman wrote:
> >> On Wed, Aug 08, 2012 at 03:12:13PM +0900, Minchan Kim wrote:
> >>> This patchset promotes zram/zsmalloc from staging.
> >>> Both are very clean and zram is used by many embedded product
> >>> for a long time.
> >>>
> >>> [1-3] are patches not merged into linux-next yet but needed
> >>> it as base for [4-5] which promotes zsmalloc.
> >>> Greg, if you merged [1-3] already, skip them.
> >>
> >> I've applied 1-3 and now 4, but that's it, I can't apply the rest
> > 
> > Thanks!
> > 
> >> without getting acks from the -mm maintainers, sorry.  Please work with
> > 
> > Nitin suggested zsmalloc could be in /lib or /zram out of /mm but I want
> > to confirm it from akpm so let's wait his opinion.
> > 
> 
> akpm, please?

To Nitin
Now both zram/zcache uses zsmalloc so I think second place is under /lib than
/zram if we really want to put it out of /mm but my preference is still
under /mm. If akpm don't oppose, I will do.
(Let's not consider removal of zsmalloc in zcache at the moment because
it's just Dan's trial and it's not realized yet. It's very twisted problem
and I don't expect it will finish soon :( )

To akpm,

I would like to put zsmalloc under /mm because it uses a few field of struct
page freely. IIRC, you pointed out, too. What do you think about it?
If you don't want, I will put zsmalloc under /lib.

To Jens,

I would like to put zram under driver/blocks.
Can I get your Ack?

> 
> > Anyway, another question. zram would be under driver/blocks.
> > Do I need ACK from Jens for that?
> > 
> 
> Added Jens to CC list.
> 
> Thanks,
> Nitin
> 
> --
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-- 
Kind regards,
Minchan Kim
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