linux-kernel - Re: [PATCH 6/6] zsmalloc: make zsmalloc portable

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Message-ID: <4F982862.4050302@linux.vnet.ibm.com>
Date:	Wed, 25 Apr 2012 11:37:54 -0500
From:	Seth Jennings <sjenning@...ux.vnet.ibm.com>
To:	Minchan Kim <minchan@...nel.org>
CC:	Nitin Gupta <ngupta@...are.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 6/6] zsmalloc: make zsmalloc portable

Hey Minchan,

Thanks for the patches!

On 04/25/2012 09:32 AM, Nitin Gupta wrote:
> I think Seth was working on this improvement but not sure about the
> current status. Seth?

Yes, I looked at this option, and it is very clean and portable.

Unfortunately, IIRC, with our rate of mapping/unmapping,
flush_tlb_kernel_range() causes an IPI storm that effective
stalls the machine.

I'll apply your patch and try it out.

Thanks,
Seth

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