linux-kernel - Re: [PATCH v3 2/5] zero-filled pages awareness

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Date:	Mon, 18 Mar 2013 17:50:23 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Wanpeng Li <liwanp@...ux.vnet.ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Seth Jennings <sjenning@...ux.vnet.ibm.com>,
	Konrad Rzeszutek Wilk <konrad@...nok.org>,
	Minchan Kim <minchan@...nel.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/5] zero-filled pages awareness

On Fri, Mar 15, 2013 at 10:34:17AM +0800, Wanpeng Li wrote:
> Compression of zero-filled pages can unneccessarily cause internal
> fragmentation, and thus waste memory. This special case can be
> optimized.
> 
> This patch captures zero-filled pages, and marks their corresponding
> zcache backing page entry as zero-filled. Whenever such zero-filled
> page is retrieved, we fill the page frame with zero.
> 
> Acked-by: Dan Magenheimer <dan.magenheimer@...cle.com>
> Signed-off-by: Wanpeng Li <liwanp@...ux.vnet.ibm.com>

This patch applies with a bunch of fuzz, meaning it wasn't made against
the latest tree, which worries me.  Care to redo it, and the rest of the
series, and resend it?

thanks,

greg k-h
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