linux-kernel - Re: [PATCH v2 0/3] staging: zcache: xcfmalloc support

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Date:	Fri, 9 Sep 2011 13:34:47 -0700
From:	Greg KH <greg@...ah.com>
To:	Seth Jennings <sjenning@...ux.vnet.ibm.com>
Cc:	gregkh@...e.de, devel@...verdev.osuosl.org,
	dan.magenheimer@...cle.com, cascardo@...oscopio.com,
	linux-kernel@...r.kernel.org, dave@...ux.vnet.ibm.com,
	linux-mm@...ck.org, brking@...ux.vnet.ibm.com,
	rcj@...ux.vnet.ibm.com, ngupta@...are.org
Subject: Re: [PATCH v2 0/3] staging: zcache: xcfmalloc support

On Wed, Sep 07, 2011 at 09:09:04AM -0500, Seth Jennings wrote:
> Changelog:
> v2: fix bug in find_remove_block()
>     fix whitespace warning at EOF
> 
> This patchset introduces a new memory allocator for persistent
> pages for zcache.  The current allocator is xvmalloc.  xvmalloc
> has two notable limitations:
> * High (up to 50%) external fragmentation on allocation sets > PAGE_SIZE/2
> * No compaction support which reduces page reclaimation

I need some acks from other zcache developers before I can accept this.

{hint...}

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