linux-kernel - Re: [PATCHv4 0/7] zswap: compressed swap caching

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Message-ID: <20130130043214.GC2580@blaptop>
Date:	Wed, 30 Jan 2013 13:32:14 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Seth Jennings <sjenning@...ux.vnet.ibm.com>
Cc:	Joe Perches <joe@...ches.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Nitin Gupta <ngupta@...are.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Robert Jennings <rcj@...ux.vnet.ibm.com>,
	Jenifer Hopper <jhopper@...ibm.com>,
	Mel Gorman <mgorman@...e.de>,
	Johannes Weiner <jweiner@...hat.com>,
	Rik van Riel <riel@...hat.com>,
	Larry Woodman <lwoodman@...hat.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Dave Hansen <dave@...ux.vnet.ibm.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org
Subject: Re: [PATCHv4 0/7] zswap: compressed swap caching

On Tue, Jan 29, 2013 at 04:49:04PM -0600, Seth Jennings wrote:
> On 01/29/2013 04:14 PM, Joe Perches wrote:
> > On Tue, 2013-01-29 at 15:40 -0600, Seth Jennings wrote:
> >> The code required for the flushing is in a separate patch now
> >> as requested.
> > 
> > What tree does this apply to?
> > Both -next and linus fail to compile.
> 
> Link to build instruction in the cover letter:
> 
> >> NOTE: To build, read this:
> >> http://lkml.org/lkml/2013/1/28/586
> 
> The complexity is due to a conflict with a zsmalloc patch in Greg's
> staging tree that has yet to make its way upstream.
> 
> Sorry for the inconvenience.

Seth, Please don't ignore previous review if you didn't convince reviewer.
I don't want to consume time with arguing trivial things.

Copy and Paste from previous discussion from zsmalloc pathset

> > > On Fri, Jan 25, 2013 at 11:46:14AM -0600, Seth Jennings wrote:
> > >> These patches are the first 4 patches of the zswap patchset I
> > >> sent out previously.  Some recent commits to zsmalloc and
> > >> zcache in staging-next forced a rebase. While I was at it, Nitin
> > >> (zsmalloc maintainer) requested I break these 4 patches out from
> > >> the zswap patchset, since they stand on their own.
> > > 
> > > [2/4] and [4/4] is okay to merge current zsmalloc in staging but
> > > [1/4] and [3/4] is dependent on zswap so it should be part of
> > > zswap patchset.
> > 
> > Just to clarify, patches 1 and 3 are _not_ dependent on zswap.  They
> > just introduce changes that are only needed by zswap.
> 
> I don't think so. If zswap might be not merged, we don't need [1, 3]
> at the moment. You could argue that [1, 3] make zsmalloc more flexible
> and I agree. BUT I want it when we have needs. It would be not too late.
> So [1,3] should be part of zswap patchset.

-- 
Kind regards,
Minchan Kim
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